Talking Cans with Allan Gray - Roothy Bushmechanic
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- Опубліковано 31 січ 2017
- httpss://www.roothy.com.au/
I've been hearing a lot of stories lately about the benefits of catch cans, and not just on the modern common rail stuff either. So I stopped in at Terrain Tamer in melbourne to get the full insight on the FlashLube Catch Can from my mate Allan Gray - as usual I ended up doing all the spanner work!
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Blokes like yourselves are real Gems on this You Tube. Great stuff & keep up the good work/info. Cheers
I don’t think there is anyone on this planet that doesn’t love Roothy 👍❤️
Ooooh, maybe you haven't met enough people..... appreciated tho, thanks
Geez keep unscrewing all we'll be here all day!! These two are funny! Catch cans sound like a good idea.
Many years ago a heavy duty mechanic told me "no turbo diesel motor should EVER breath its own fumes"......that was good enough for me....first mod to my BT50 was the catch can, then the secondary fuel filter....
Its not done for performance, it's done because of exhaust emission laws.
Very rare to see people on UA-cam who actually know what they are talking about! Great to see..
I fitted one these catch cans and a flash lube 2nd fuel filter I must say I'm very impressed by both units the catch can is so easy to drain simply just put a empty coke bottle under the drain hose and turn the value and drain it out and they are both wright no blank of plates anywhere and the return hose is still as clean as the day it went on i drain it 5oooks or depending on what I've driving I've done but these units I can't speak highly enough of and easy to fit
Thanks flash lube
A Bex and a magazine! Priceless!
I fitted a mann and hummel provent to my 1hd-ft and its brilliant.
Run one happy as a pig in shit.
RedmistAU
I’ve got the same engine. Is there a specific part number?
Ive fitted the same happy as larry
3:32 clean air, (yep) clean manifold (yep) clean injectors (huh? whoa nellie!!!!!)
Tdi 300 Disco left hand chassis rail catch can / rust prevention. Cleaned the engine up no end.
This is a fantastic idea. I think bus and truck are companies should have these fitted to there vehicles.
Some are fine to blank the egr on. My current vehicle was only fitted with egr for certain markets and so the egr ( if fitted) can be blanked with no problems.
Good
Point.
Ok, "when the filter gets blocked the relief valve lets the pressure out and you can see a dribble of oil" my understanding of crankcase venting is that if there is any restrictions to the venting it will cause a positive pressure in the engine and blow oil out through the seals. So wouldn't a catch can with no filter be better?
Hey John or Al, I live in Vic and may pop out Terrain Tamer for a chat with Al. However, in the interim I just want to pick your brains and experience. I have Navara 2013 D22 I am thinking about putting in a Chip & Exhaust etc and there are so many chips out there, I was just wondering which Chip you would recommend for the Nav? and why? Sorry to be asking stupid questions but I am mechanically challenged.
Running with disabled EGR for the past 5 years, without issues. VW also ran with disabled EGR (until they got caught).
@Jim Barrows hahah preach harder
When I grow up, I want a beard like that
Crackin combination!
can they be fitted to the standard bj40 ?? love the vids by the way
that's a world of knowledge there, and a hole lot of attitude...
I have a flash lube one can you clean filter or just replace
EGR pipes on my car are sooty but not clogged, intake and intercooler full of oil before it meets EGR, and after mixing with crankcase vapours my intake manifolds were FULL of the sticky mess and severely restricting. So I say just leave EGR alone and sort out CCV and Bob's your aunty!
JTL makes a great catch can. Looks factory
Roothy and Alan, jesus i had a horrible time with rebuilding a 2.8litre isuzu for my rodeo a few years ago, it was never right and after thousands of dollars and no success with various diesel mechanics, i gave up. It always ran but it was loud and had oil going thru the turbo like no tommorow. I wish i had gone to TT from the start. I bought a hilux and wrote off all the money spent on the rodeo. RIP.
There is a problem with gas engines building a crust of carbon on intake valve stems, and direct injection gas engines even worse, because the fuel is not in the intake port washing deposits off. There was a youtuber, fordtechmaculoco, who reported that Ford replaced a bunch of cylinder heads under warranty, on the EcoBoost V6's, due to this crust causing poor running on these US engines.
The cause was that the hose entered the manifold near the center cylinder, instead of further upstream. The fix was a device like this catch can.
I read another report that newer GM engines are using piston rings with lower tension on cylinder walls, thus allowing more blowby gases. (The report cited less friction on the rotating assembly was the reason for the thinner rings).
The question is, are there Ford turbo engines widely available down under?
And
I'll bet most modern engines would benefit from a catch can system, gas or diesel.
Just found your channel this week.
John is there one or these for 94 ln106 hilux pls
When you say EGR plate can cause damage, what about VDJ that has been blocked off but remapped. Does this simply mean the remap stops the error code, but can still cause damage ?
Scott Abraham no a remapped ecu or flash tuned/ plug and play won't stop the ECU throwing fault codes unless the data is being manipulated specific to the EGR system.
It can cause damage if the engine was designed to vent pressure and that pressure is now accumulating inside. More likely than not it will blow gaskets than actually serious internal damage.
The Prophecy Cat You should close your mouth as you clearly haven't a clue what your talking about. An egr blocked off causing pressure that will damage an engine", your a moron!
Dave Pw there are some systems like the early DiD Hiluxes that use the EGR system also for boost control. Blanking these will kill your very e pensive variable geometry turbo.
On those the only safe way to disable EGR is to have it tuned out.
Many common rail engines will also throw codes and limp modes with a blank plate unless some electronic method is used to switch of EGR function (tuned out, munji cabke etc) or some plumbing mods to replace the exhaust gas with clean air from between the turbo and inter cooler so the EGR valve sees the flow and pressure changes it expects, then the exhaust manifold can be blocked
@@dave216dx no need ti be so rude, especially when you're just making yourself look stupid,
the ford Ranger egr doubles as an overboost vent too.
You have to map the egr out but leave it capable of venting the turbos overboost via software. Not all vehicles are old bogan fuck trucks from the 2001 mate
@@pugnut403 generally egr recycles mostly at closed to partly open throttle conditions.where the turbo is not in a high boost condition
What about a new Dmax?
How can you damage a motor when you use a blanking plate to block off the EGR?
Aldo Infante You can't!
You can’t.
Only issue I have with this video.
That said, most common rail motors will throw fault codes and go into limp mode if you block EGR, and the DiD Hiluxes use the EGR system as part of their boost control system and can kill turbos with a blank plate. On these you need a custom tune to code EGR off.
Some vehicles you can fool the system with a resistor on a temp sensor, or plug and play systems like Munji cable, and you can also block EGR at the exhaust manifold and plumb the EGR valve to feed clean air from the high pressure side of the turbo between turbo and inter cooler, so the valve sees the flow and pressure differentials it is expecting to see, but only clean filtered air goes into the manifold.
There is NO benefit to the engine from EGR at all. Removing it increases NoX emissions, but reduces other emissions so there are swings and roundabouts.
No, it will not overheat your engine, EGR already switches off at full load when the engine is making the most heat, and if deleting EGR will make your engine overheat at light to medium throttle then there is something major wrong with it...
@@pugnut403 Before getting my 2019 Triton which got a Munji cord in the first week, i had the 2 car game, GQ Patrol rigged up and my 09 Peugeot Partner 1.6hdi.
I blanked the egr and fitted catch can when i bought it at 90,000km and traded it in at 410,000km, never removed the intake or intercooler and kept same power and fuel economy since day 1.
@Aldo Infante The EGR cools the combustion chamber that reduces oxides of nitrogen. But this cooling eliminates the detonation, knock or ping. So other than mechanical damage, it allows the engine to run with higher spark advanced and acts like high octane fuel or fuel with a higher anti-knock value. No EGR at idle or cold coolant, so install a “Flashlube” oil catch can, keeps the exhaust clean, keep the O2 sensors clean and the cats. Otherwise cats heat up, swell, crack and turn sideways blocking your exhaust. You’ll be running poorly like a banana in your tailpipe.
@Jim Barrows what ways is them? apart from going to a dealer with a problem
1990 Volvo 240 red block engine, has an oil separator box as standard, feeds separated oil back to the sump. Is this a bad situation? No PCV valve, just a flame trap from the rocker cover. Just curious as to why this has become an issue the manufacturer's/auto engineers have not considered. Remember these devices are intended to reduce the pollution that we all breath in!!
The Redblock still has a PCV system, that pressure needs to co somewhere.
The oil separator does a good job of reducing the oil that gets into the manifold, and the flame trap stops a backfire setting the sump alight and turning it into a bomb (when it’s not gummed up with oil, pressurising the sump, and popping the rear main or front cam seals...) but that air once separated from the oil, does go into the manifold. The separator box and flame trap replace the conventional PCV valve seen on most engines.
High power turbo redblocks often have large catch cans because that oil separator can’t handle the extra blow by.
I messed with Redblock Volvos for many years, and have cleaned out more flame traps than I would like to think about...
Why does Anthony Hopkins present a car related video?
is it worth putting one on after the cars already done 300k?
mathew Marshall. yes.
Better HP, and MPG. Longer lasting turbos and the life of the engine. When a very good maintenance procedure is followed. I do oil filter fuel filter and undercarriage inspection and lube every 3K miles. That's 4800 kilometers.
I'm picking up my brand new 2019 D-max soon and was wondering if I will void my warranty if I fit a catch can.....any ideas?
Warranty has to prove a catch can caused an oem part failure and if the install is done right you won’t have an issue. I have a Provent 200 on my DMax, best thing you can do. It does NOT void warranty, warranty is there for failure of components and manufacturers know it.
Be careful. A manafacturer can turn around and say, "mate, you modified the engine, the impetus is on you to hire an engineer to author a report to prove it wasn't a contributing factor to the issue". This costs money, and takes time and effort. You'll pay for it in stress as well. Engines don't need catch cans. There is an oil separator as standard with all vehicles which collects oil as it comes out of the crank case.
Can I get one for a 2000 7.3
Would it be wise to install one on a new L5P Duramax 3500HD?
In my opinion yes. Feeding fumes thru a new motor isn't great for anything!
Engine sewage will never be returned to my very finely metered air-fuel ratio to mess with its best cleanest combustion giving the best emissions possible the most possible HP and the greatest MPG. At the expense of clogging the intercooler and the rest of the fresh air manifold, we haven't even talked about what it can do to the very highly machined turbos that spin at incredible speeds. What do you think that can do to the balance of these instruments and consequently the longevity of these crucial parts? Very expensive parts? That requires many man-hours to replace.
Do you use only on diesel or is it needed in petrol engine too?
pieter woodhatch Catch cans are even more common on petrol vehicles. Usually put on race/performance cars. _Slightly_ different effect but same basic idea.
Both of my old 12HT's didn't have this deposit caked up in the intake but my 1HDFTE cetainly did. If it isn't being caused by EGR then why is it happening? Is it because the oil that is in the intake is being heated by the egr gas and then being left as a deposit?
dousty it happens because the oil from the crank breather is mixing with the soot from the egr which causes a thick paste
This thick past also builds up in the theottle body and the intake manifold,it is like vegemite.
Yup as I understand it it’s the combination of both. I’m not sure why they say blanking off the EGR can damage your engine. I don’t approve of blanking off the EGR but surely theoretically blanking off the EGR AND installing a catch can would be the best in terms of reducing deposits.
It is possible to get rid of most crank case pressure infact modern engines have very little pressure build up due to tighter tolerances and better sealing
As for getting rid of it completely look at a modern high performance engine where vacuum is run into the crankcase this not only eliminates pressure in the crankcase but also give a power boost
hi. I just bought the Flash Lube Catch Can. Its on its way to argentina. How do you connect it? my motor is a 3.0L d4d 1kd. Does it go before the EGR ? do you have a diagram for the instalation? thxs
Doesn't go anywhere on the EGR. Where it goes is on the PCV coming out of the top of your rocker cover and the outlet goes into the Air cleaner inlet hose where the PVC hose was previously connected.
Hi John can you use them on petrol motors as well please let me no thanks
You can mate.
Yes
Do you rate a catch can on new cars John? I only do long runs, it has 1500km on it.
Do you run one on the Mahindra?
Yes and yes - the only reason to put oil vapor back through an engine is to meet govt requiremnts - you're just gunking it up eventually. Mahindra took a Terrain Tamer unit but needed some different fittings..
@@JOHNROOTHROOTHY thanks John 👍
Worth putting a catch can on a n/a 1HZ?
This is my issue how come the manufacturers never install this with the vehicle in the first place
2 reasons - it's more servicing and cost, and maybe longevity isn't what purveyors of new vehicles want....
dont for get the water he showed is what the acid in the crankcase is based on. no water = no acid.
what dose it do to the engine if you block plate the egr Allan pls details
It makes the engine last longer and run cleaner....only bit of bullshit in this video.
For a start, Ford ranger/ mazda bt50 and toyota hilux all use the egr in some format for turbo boost control, overboosting without relief = popped turbo and or motor
@@troymash what year Ranger? I have a 13 plate 3.2 which is running fine, been plated for around 7 months. I know the 2015 onwards throws a code if you plate it
How did diesel motors ever last before EGR valves
Mostly the fumes went straight to the ground/road surface with a pipe - just more trumped up crap from the greenies....
Blocking EGR will damage what? I couldn't hear the word very well. Someone to help?
I've blocked my egr about a year ago. My motor is still great.. And today, I went got a oil catch can. Same one. On this video... I'm lost too mate..
I also blocked my NW Pajero diesel EGR about 3 years ago. It was an ex-rental. Has now done 135,000 over 6.7years, and goes like a rocket. Have never had a dash light come on and I tow a caravan occasionally. Only other thing I have done is install a K&N filter which I have done on every vehicle for the last 25 years or so. Am I just lucky?
@@gregsneddon8020 K&Ns leak grit. Use a paper filter. Do not have to remember to clean paper. Just throw it away. Also paper can be removed and bounced on the pavement to remove dust and leaves before needing replacing. Try getting dust and leaves out of a K&N.
Blocked off my egr 2 years ago and no problems
@Jim Barrows how?
GDay from WA 📍🦘
What’s the order number for that Flash ⚡️ Lube can ⁉️ 🍻 8:24
Will these work on gas engines, too?
Yes, if it's breathing it's fumes - remember in the old days (pre '75) cars breathed direct to the ground. All you
're doing is collecting it in a can to drain later.
I've blocked my egr pipe.. And I've got the same oil catch can... I am doing the wrong thing. I'm lost now... I've got a Nissan patrol 3lt comm rail 08
G'day mate, not exactly sure what you have done, but there should be a pipe running from the catch can that connect back to where the EGR pipe was.
@@JOHNROOTHROOTHY I think you are seriously confused here Roothy. The EGR system and the crankcase ventilation system are completely unrelated separate systems. You do not plumb a catch can into the EGR system.
@@alexfletcher1230 G'day mate, yeah you are correct, only used to my old engines where EGR doesn't exist :)
Maybe you can reply to the previous comment and help him out.
@@JOHNROOTHROOTHY I think I can help clarify here:
EGR = Exhaust Gas Re-circulation. It takes a portion of your exhaust gas directly from the manifold pre-turbo at partial throttle, runs it through a cooler and directs it back into the intake. This lowers emissions but can also gunk up the intake. On certain cars the EGR cooler can fail and allow coolant to enter the intake - bad news obviously but nothing to do with a catch can.
PCV = Positive Crankcase Ventilation. This is where the catch can comes in. It takes the fumes that blow by the pistons and into the crankcase then redirects them into the intake to be burnt again, usually taken from the rocker cover. The problem is that these blow by fumes tend to collect oil droplets on the way through the crankcase which then mix with the EGR gasses to form a thick sludge (google blocked diesel manifold and you will see what I mean). The catch can is placed in-between the rocker cover and intake and removes the fine oil droplets from the air. The dirty fumes can then be run back through the intake with minimal contamination.
Diesels are dirty motors, no way of getting around that. You can defeat PCV, EGR and DPF systems, but at the end of the day you and your family are the ones breathing in the carcinogenic fumes produced by your own diesel, so apart from legal issues with the EGR and DPF you should probably leave them alone. But a catch-can is 100% legal so long as you return the cleaned fumes back into the intake.
Hope that helps
B Mon blocking EGR will not hurt your engine, it will make it last longer.
The on,y downsides are an increase in NoX emissions (countered by a drop in other emissions) and the fact that it is illegal.
In every other way it is a positive for the engine.
Any actual examples of engine damage caused by blocking EGR?
That's what I thought...
I can’t work that out either. Only negative thing it does (other than increase emissions) is raise combustion temperature, but shouldn’t be beyond normal high temperatures.
Tim that's great information. Thanks, but it doesn't answer my question. Allen states in this video that EGR blocking "wears out" engines. I'm wanting to hear from anyone who has actually seen this first hand.
Tim thank you for the great info, I am looking at these comments because I am going to be doing an EGR delete on my 2.8 CRD jeep... As far as I can tell, removing and blocking the system completely is standard for those who no longer need to pass emissions, but there is a small debate about engine pressure which your comments have helped me feel better about. QUESTION though, do you know if have a catch can or provent system would be redundant for a diesel with a deleted EGR or would it help clean the system out further? Thanks for your knowledge in advance!
Dont hold your breath
So is this the same as provent 100? What hp they rated to? Also see option for metal filter are they the same?
George Plimmer closer to a provent 200.
Not hp but i imagine volume of air flow.
hope there is no restriction with a filter in there
Looks like a smaller provent!
Nissan Patrol GR 3.0 Di Turbo very similar to provent.
This and provent are the only ones I would use.
It's videos like this that cause me such consternation. Roothy recommends catch cans, John Cadogan says they're bullshit. Who do I believe!?
Got a lot of respect for JC but he's sponsored by new car sales, and catch cans are for people who keep their vehicles long term.
@@JOHNROOTHROOTHY Thanks for the reply Roothy. I've been following you for years, respect your POV. I'm still torn and confused though. 😢
why are you talking about EGR on a catch can video? 2 different systems
EGR allows fine diesel exhausts particulate to enter the inlet manifold that would mix with oily vapour that creates crud. So they’re inter-related.
Ok but if a catch can is so important, why don't the manufacture just include them?
primarily cost, and your ordinary car owner would have to empty it on a regular basis and dispose of the oil correctly depending on the ambient driving temp of the prevailing season.
I think Isuzu do on some Trucks
Drew they do
Lol. Allan Gray sounds like a rip off mechanic! 3 to 4 thousand dollars every 40k!
Watching that metal watch band around the hot battery terminal and the car frame. Not a good idea. Whoops, looks like leather but still metal buckle.
ProVent 200....
Don't want to disrespect you too guru's but a blanking plate with a 10mil hole in it works fine. No one is more fussy than me with my motor & it has never run so clean & cool since doing this mod. I am still going to install a catch can too just to be doubly sure but am very happy with the plate. Are you guys making money off the Flash Lube cans? You seem to be pushing em pretty hard. Good vids though.
Agghh! John, don't just tell us the advantages, tell us some of the disadvantages too. Sounds like your still a slave to the advertising BS like when you were with 4wd action. 😔
Catch cans are GREAT if you're the mechanical type and are always maintaining the filter element and draining the residual oil... Not so great for the average Joe that isn't savvy.
Disadvantages...
Catch cans will definitely effect manufacture warranty on any new vehicle! Just like any after market products you install on a vehicle. No matter who installs it, If that after market accessory is found to have been the cause of an engine problem or failure of any part. No warranty! Fact.
Catch cans do cause problems if they're not serviced or installed correctly. One big problem I've seen happen to a few unfortunate people is forgetting to close the drain tap at the bottom of the catch can. This will cause the turbo to suck unfiltered air through the drain hose into the catch can and straight into the air intake of the engine! Usually causing turbo failure and at worst case scenario, engine failure. Fact. Don't ask me how I know. 😔
Quality catch cans do a great job if you're good enough to look after them but you'll still eventually have carbon particals from the EGR valve blocking the intake manifolds... But yeah, it will take a lot longer to gunk up with a quality catch can, as you don't have as much oily vapour mixing with the carbon gasses.
Blocking the EGR valve is highly illegal and irresponsible but you'll probably find that a lot of people in the 4wd industry still do it anyway. Fact. 😉
For those people that have blocked their EGR valves, it's really not worth going to the expense and risk of an oil catch can. Oily vapours on their own without EGR gasses won't build up at all.. The only issues with oily vapours is the mess it can make in your intercooler. It's very easy to clean your intercooler out compared to an intake manifold.
And if you're the irresponsible type and not worried about your health or legalities of blocking thee EGR valve, then just vent your PCV vapours to atmosphere as well. 😉 Venting to atmosphere can still be done through a catch can and then vented into your chassis rails... Savings the environment and adding a bit of rust protection to your chassis. 👍
Unfortunately this is still deemed illegal. So only for off road purposes people! 😉
Still Luv ya Roothy. 👍
Good points. Also catch cans do not catch 100% of the oil. Some gets by. Bet that screws up your intake, turbo, intercooler, valves anyway.
Steve Burns it's not hard to maintain a catch can lmao
Well that's totally incorrect information. The EGR returns unburnt soot back into inlet and can at times be fairly gritty. Blocking the EGR is by far the best for the engine. A simple example is if you exhale your breathe into a Ballon and keep breathing it along with a few clean breaths inbetween we all know what happens. Inhale and exhale normally and there's no problem. I understand you can't admit to illegal fitment of a blanking plate but to tell others it's bad for an engine is crazy. and honestly I'm disappointed to hear what I thought was a great old school mechanic carry on with such garbage.
catch cans are a con as well
@@mikewatt1376 why do you say that Mike?
Exactly.
Try eating 10% of your own shot each week and tell me how you feel.
Why make your engine do it 🤯🤦🏻♂️
Mhhh, don't know about this one... They do not make any money on removing the egr... Alan is a bit pushy, but hè knows alot more than me.
Maby he is trying to be politically correct,someone with his so called knowledge should know better,to stop engine lights comeing on all you need to do is drill a small hole in the blanking plate,this will let a small amouny of gas through to keep the sensor happy.
BIG GIBBER You can buy em with the hole in em. They work great, I've proved it, my motor is as clean as new.
Bulls#$t blanking an EGR can damage your engine.
Never heard of 1 case.
The EGR valves the problem.
Indeed newer diesels are more difficult with more sensors and DPF.
EGR Blanking or removal adds longevity to your engine.
Fact !!
The catch cans looks good.
I like the other guy... "come one then or we'll be here all day...' Geez, get to the point man. We know the problem, that's why we are watching the vid. We are looking for the solution.
BLOCK EGR--------DAMAGE THE MOTOR. WHAT A CRAP!!!!!!!!! These guys should grow up and do some research
using a catchcan that is for a max 100kw engine on the 200+kw motor??? how can you say that you are an expert???
70-80k kms between change. lol the engine wont last that long
You do know that cans work on airflow and not Kw. Don't you?
i have lost all respect to roothy all due the the fact he never explains the aftermath of a working EGR i understand some legal reasons ,,,but he forgot to mention about how dirty the engine oil runs with an active EGR
EGR valves are crap,they do no good for the engine why woul you want to ump all that crap back into your engine,its all to do with polution.I blanked mine off with no problems,the throttle body and intake manifold are much cleaner,and l have also fitted a catch can.
BIG GIBBER I second that comment. I blocked my 79 series with a 10mil hole in the plate no problem at all, running like a dream & everything clean as a new one. Just because these guys won't fit em don't mean they don't work. Probably making money on the cans.
drilling in a hole in the blanking plate isn't actually a full EGR delete ..drilling in a hole only alows enough to trick sensors this stops any engine check lights my understanding if your going to delete the EGR make sure its a full delete
deanoobaby Having a 10mil hole tricks the sensors & even with a hole stops 90% of crude entering, so i will take that over the hassel of a full delete. Just add a catch can to be sure also.
that's what I had said ..nearly all the vehicles I have owned I have fully deleted the EGR some are harder than others ...the 10 mm hole is only a restriction to be honest I have never needed to drill in a hole as I have tricked sensors by other ways ...depending on the quality of the catch can this can also be a curtain percentage of catching oil unless it a high end catch can ...if the engine also runs a turbo ..a turbo can also bypass slights amount of oil (nature of the system ) ..a catch can will not catch this oil from a turbo ....a 10mm hole seems rather large compared to the normal size of 3/16 hole
Hilario’s..... what bullshit. These muppets know more than the engineers who designed the engine. Just leave as standard and won’t have any of these issues they themselves are creating
For environmental reasons you are 100% correct that egr is necessary to reduce nox. In terms of engine longevity you are absolutely full of shit. EGR introduces soot particles (fine pieces of carbon that act as sand) passed through your your motor and coats the entire motor in soot.
Yes that's true but exhaust gas is dry. You'll never see an exhaust manifold blocked. Because exhaust gas which was directed to the combustion chamber by egr is dry and won't be build up soot. But when it meets with oil fume coming from crankcase ventilation then things became ugly. Then dry exhaust gas and oil fume build up like shit. That's why the oil catch can is highly recommended. No oil fume no carbon build up. So easy.
mate even with a good catch provent flashlube etc take ya manifold off ands it a joke 40000kms from new etc etc egr just fucks ya engine in total you know it old graham knows it ya just can’t publicly say it $$$$ see 79 series fitted with catch cans and pulling out 300ml of oil plus on services etc.. remapping the egr to not work is only way and no damage to motor what’s so ever down the track.. yeh egr work for emimision but along the way they fuck so much other engine problems along the way FULL STOP
Too much talking not enough mechanical work. Thumbs down