Painting our 4.0L Jeep Cherokee XJ engine (soon to be a stroked 4.6L)
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- Опубліковано 6 жов 2024
- What's the point of doing a complete rebuild of an engine if you don't give it a great paint job? Davin starts out his work this week on cleaning and prepping our 4.0L Jeep XJ engine block for paint. Then he heads over to Traverse Body & Paint to have some glossy black paint sprayed on it, the new head, new oil pan, and valve cover.
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Seeing the needle gun brought back memories of chipping rust on my first submarine when I was in the Navy.
Good old days of; It moves salute it, does not move paint it." eh? LOL
I thought of deck department on the aircraft carrier I served on (USS RONALD REAGAN CVN-76). I was lucky enough to already be rated when I came aboard, but, as a Legalman, I got to know plenty of undes sailors who passed through our shop on-route to NJP ;)
Came to say the same thing
Ditto Kevin
Were you in ww2?
If you don't have a 3D printer to make plugs for the freeze plug holes, rubberized expansion plugs work just as well.
Removing the casting shrapnel and taping/painting the block before assembly definitely adds at least 10 horsepower.
In the Navy we called that a needle gun. Two things junior sailors spent most of their time doing: Fixing rust and dancing with mops. I also fixed copiers.
Wow right tools make everything easier
Wish you guys would have came out with this series about 1.5 years ago cause that’s when I started the tear down of my jeep’s 4.0 and rebuilt it as a 4.7L stroker haha. Never did something like that before but it was one heck of a cool learning experience to rebuild an engine. Love your channel, keep up the awesome content!!
Also used by some welders! Weld then descales, before grinding!
Needle gun. Lots of Navy veterans have memories of it!
Remember, "any tool is the right tool." ( Red Green)
If the women don't find you handsome. They should at least find you handy.
I'm a man and I can change. If I have to.🤣🤣
Tip from a former pro painter and machinist, engine builder.
Load your paint gun full of WASH THINNER.
Put the air cap on full squirt, NOT a full pattern.
PRIOR TO TAPING OFF THE INSIDES!!!
Shoot the crap out of ALL your parts, both inside and out.
WEAR EYE PROTECTION!!!
Soak the parts down so the WASH THINNER runs off the parts.
The running off WASH thinner will take ALL the dirt and oil with it!!!
WASH THINNER is like regular painting Lacquer thinner
BUT it is very cheap and evaporates almost instantly!
Much faster evaporation than regular lacquer thinner!!!
Sometimes I use straight Acetone...
Same deal.
Either of these concoctions blow off VERY effectively!!!
Blowing off the parts also gets rid of little fuzzies from the shop towels!
I have more painting tricks in my pea sized brain.....
Totally missed the opportunity to paint that sucker AMC Caravelle blue as a tribute to the AMC design of the 4.0! That lump would have looked great in that Green/Blue on that stand being assembled!
As a jeep and amc collector this is awesome to see.I have put a million miles on straight 6's. I'M building a 4.2 litter with a 4.0 head for a jeep cj7. If you want to see the coolest straight 6 look up the amc ppg pace car. I saw it at the amc 100th anniversary car show in Kenosha. It had Porsche fuel injection and a Porsche turbo and made the coolest noise running. Your making this wisconsin boy proud.
You said AMC collecter?My compliments!I've owned many,many Ramblers(all straight sixes) and STILL think they were very pretty automobiles,very utilitarian and easy to work on and maintenance is a breeze!Haven't even seen one in years so it's good to hear of someone interested in AMC!
old fashioned sink stoppers, or corks for small holes work for your masking of freeze plugs too
@0:41... you call it a De-Scaler; in the US Navy, we called them "Needle Guns", hearing protection required!
Spent many, many hours riding a needle gun onboard several Coast Guard ships and steel hulled Search and Rescue boats from 1974-78. That and a Deck Growler were our favorite weapons against rust, sure beat a Chipping Hammer.
Hi Davin, in my opinion nothing is more satisfying and relaxing than enamel painting cast iron parts…sweet work dude, live long and prosper buddy 🖖
Good thinking with that needle scaler,saved time AND left a nice finish!
When I paint an engine, I just bolt everything together, oil Pan through Valve Cover without any gaskets, it saves a lot of time masking everything off
Nice work cleaning up that block… the slag buster/de-scaler worked wonders!
8:03 "Alright well hey, you know the drill. Drop your stocks and grab your shocks, head on out to the shop and get some work done."
That’s how it must be. As I always say, it isn’t because we don’t see it, it don’t have to be perfect !!
I started having flashbacks of the paint chippers while on board the Air Craft Cartier 😬🤪
Thank you for making that video. I am almost up to painting my engine. IT answers a lot of questions!
One thing I learned...leaks are harder to find w gloss black blocks. Otherwise I love it!
Hands down, THE BEST rebuild series on YT!
When I was in the Navy we called those needle guns. We used them for removing paint and rust on the ship.
Man, all that just to paint it black. I was hoping for AMC metallic green. :)
Thanks for the video. I obsess over getting heads and blocks clean.
We called those things needle guns in the Navy!
All that effort…for black. I appreciate the result, but even something with a hint of tint would’ve been nice. I’f you’ve planned the Cherokee to be red, go over the black with a cherry or cranberry Chroma-Illusion topcoat so when you look at the engine, you know it’s not black, but you have to stare at it in the right light to get that waft of red.
I like what Chip Foose says: The engine bay is the jewelry box, and the engine is the jewel. Open the hood and there's the jewels.
It’s a Jeep 4.0 block. The rear main seal will sling enough oil all over everything in short order. It’s not a jewel. It’s a hammer mean to do a job.
I’d love to see the valve cover done like the timing cover. Still looking good.
My Uncle used to say "You got to be smarter than the tools your using." :)
I just watched Sarah-n-tuned do the same thing with a de-scaler on her ranger 4 liter block
Yeah the de-scaler is great for that type of job. Okay, that plug makes sense too. 3D printers are useful, but not for structural unless you have one that does metal.
There are some 3d printers that do print metal. It's a several-step process, but the stuff that can be created? Amazing!
Cool! Nice descaler discovery….
Great idea..work smarter not harder as the old saying goes.
I use small tapered silicone plugs to plug up all the small holes
Oooohhhh, that works really well!
That wedding ring - you still have all your fingers - for now.
Yes, he definitely does need to take it off next time. Or his finger will be off.😣😣
We use something similar in civil engineering. We call it a pin scabbler, absolutely no different in design to what you have. We use it to roughen the surface of concrete it we are pouring against it and want a good joint.
Loving this series of videos! Keep up the good work.
I have seen welders use that tool for knocking off the slag on a weld.
NICE!
WOW!
drain plugs will do the same thing as your printed plastic ones and fit better.
I dunno, the casting imperfections seem trivial and I think add character, like a knot hole.
While I understand the sponsorship with Rock Auto, I really wish you could be using an Edelbrock aluminum cylinder head in this build.
No. I suspect most watching this have older Jeeps and cannot afford a $1,700+ head to fix Chrysler’s mistakes. If you have the cash, go experiment with the stupidly over-priced head and make your own UA-cam video about it. I may even watch it.😁
There's absolutely nothing wrong with the OEM head on a 4.0. It flows just fine.
The only one you need to worry about is the 0330 castings. That series was weak between cylinders 3 & 4, and tended to crack, causing overheating issues.
@@oryzomyspalustris4593 I’m sorry that I triggered you. I happen to like the Edelbrock cylinder head, and do not think it’s over priced. I like how not only does it make more power, but like any aluminum head conversion, it takes away a crap ton of weight and from high up.
Stock engines are fine with stock heads , once you go and stroke it out to 4.6-4.7 or even 4.9 the Edelbrock head just works better.
Speaking as a quality engineer that used to specialize in casting both steel and gray iron. anything on the inside of an engine that could possibly but break off during use would be removed but what you were removing would never have been addressed in the casting cleaning room as long as it didn't interfere with the machining operations. We would have called that burnt on sand.
The problem is “burnt on sand” looks like turkey poop and must be removed for a quality paint job like Devin requires.
black is beautiful but it wont show you were its leaking oil as well
We call it a needle scaler to remove a thin film of concrete buildup that coats concrete trucks
Used a needle gun to remove the paint on the deck of a 580 foot freighter
Spent many an hour as a shipyard worker with the needle gun.
Tell davin to pop the freeze plugs in before paint, and cost them in grease. When done painting, wipe grease out. No paint
Black? Ugh. You missed the chance to paint it a nice Willys turquoise. But black does hide oil leaks quite nicely.
Do y'all plan on running bigger injectors? If so which ones. And do ya plan on using later model intake?
You can cut sparkplug protectors in half and slip em over injectors to prevent predination.
I actually said son of a B!$@* out loud. That's a dam good idea!!! Now I gotta get me one of those tools.
Harbor freight is calling. 😆😆😆
i may be just overlooking the videos, but is there any news on the 440?
Sometimes you just gotta sit under the learning tree.
Ah yes, the tickler
Why not sanding or ultrasounds to clean engine?
Do tou know Tom, David or Carrie wright...Wright... my uncle owned bo beer and deli...
What did you use to spray clean your parts before paint??. Like what type of cleaner or degreaser?…??
Why black? Why not something that shows more detail?
black , Bummer!
Why don't you powder coat?
hey just curious, what are these gigantic radiators for in the paint booth ?
General Kenobi....
second time this week i see this tool used. is this something new?
Not at all, ask any sailor about the joys of a needle gun.
Did you read my comment from last time, where I explain how even with the piston's .025" further down the hole, your compression will still go from 8.8 to 9.5 due to the extra 0.6L of displacement?
Does anyone else see their grandpa in this guy
Notification squad
Excelente 👍✌️ 🌟🌟🌟🇺🇸😶😶
What's up with the intercooler on the wall in the paint booth?
It’s a radiator. It keeps the paint booth efficiently heated and a proper temp maintained for painting and curing.
Ugh, a needle gun. Saw more than one tossed over the side by an angry Coast Guard non-rate.
Yes, this is my first time. No, you are not excesive in that. What is the point of doing it, if you don't take the opportunity to make it better?
Is it okay to create all that metal dust when de-scaling the block after it has already been machined and cleaned?
It would be more inefficient to drive it around back and forth. That needle gun is noisy to put it mildly, so I don't think that machine shop would be so happy to have it done at their place. Besides that giant parts washer has to work for it's keep.
Doing it right isn't always fast cleaning in stages gives you more time to refine something like this. Now I'm not sure if it's baked om sand from years of running or is it casting sand stuck on after the block was originally cast if so bad quality control back then lol.
@@autka_me Isn't that why it should have been de-scaled *before* taking it to the machine shop?
@@clannishkobra8965 I just don't know why Davin didn't de-scale the block before it was taken to Thirlby for machining. Seems like the order of operations should have been degrease > de-scale > machine work > wash > paint. I wouldn't want all those metal and other contaminants around a freshly machined block.
@@ZeGermanHam iirc it was painted and machine shop baked the paint off. So they would have to drive it back to their shop, descale, clean, go back to machine shop. Instead they descaled it and washed in their parts washer.
😒I guess you don’t wanna see any oil leaks with that black paint on your engine. Red or orange or green or blue. Anything but black!
Only ever working with Toyotas, I am completely ignorant of such situations. Why are/were American made things so poor quality?
Metric please.
this is called Scabbing this is due to poor foundry practices one might want to check inside the Casting as this stuff has the ability to travel inside the casting walls and can be fixed when one see this this block should have been rejected and unfortunately Chrysler foundry's were having money problems around the time that casting was made Ask me how i know i saw the casting code and that is one that may have a problem
Its safe to assume you guys know what your doing but still made me cringe seeing all the threaded holes and other openings not masked off for paint.
Eh, they can just put paint stripper in the threads and wash them out with water. Or they could just thread a bolt through it.
Re-tap them after paint. Should always use new fasteners and tap the threads in a rebuild.
I've tried both method :
Have a dummy bolt inside the thread that get painted, and then taken off.
or
Retaping after paint.
Most of the time while unscrewing the painted bolt it chips the paint on the edge of the thread, making a nice little hidden corner for rust to come back to say "hi".
whereas retaping gives a nicer look and no risk of having paint flaking off because the tap cleanly cut through the coat of paint.
So definitely painting and re-taping is better BUT it take wayyyy more time.
@@gapratt4955 That is a way to remove the paint but its needless steps when you can mask off key places that will be used on the block ie: matting surfaces, threaded holes, sealing surfaces, etc...
@@Damien.D valid point made like the humor lol. I grew up spending summers at a family farm where function is over form and antiseize is used liberally when needed.
Black color is not good for this engine.....😒😒😒
That is a hell of a lot of work for what is basically a quite shitty Jeep (imo).
Nice job though, but on a Cherokee... c'mon
Окраска двигателя никак не помогает ему лучше работать, поэтому она бесмыссленна.
1st
So you intend to strip one of the most reliable engines of all time, it's reliability. 🙄🙄🙄
...honest question: please explain the science behind the removal of external casting sand from the block surface affecting engine reliability.
@@jackmosher7561 On the outside it for cosmetic reasons for the loose flash and pockets of trapped sand. Might be some reliability benefit to removing heavy casting flash, casting parting, lines and sharp edges.
@@Airwolf1971 Ye, they are stress points and rust points. I knocked all mine off and smoothed any harsh edges that I see. Inside and out.