Suzuki Cylinder Leak Down Test - Part 2 (Are Valves Bent?)
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- Опубліковано 26 сер 2024
- This is a procedure of illustrating a cylinder leak down teak on a 2006 Suzuki Forenza to determine valve damage from a timing belt breakage. This procedure can be applied to any vehicle. I forgot to mention it in this video, but you can also check for piston ring leakage by pulling the dipstick and listening for air leakage out of the dipstick tube. And if you look in the radiator and see bubbles, you've got a blown head gasket.
I should mention that with the cylinder leak-down tester that I'm using, I wanted to show the percentage of air that was being lost. It is not necessary to buy this equipment as you can just install a hose from the compressor and just listen to where the air goes. Thanks for watching and leave your comments!
![How To Perform a Compression Test - [EASY]](http://i.ytimg.com/vi/3VmmL0YAO14/mqdefault.jpg)
Sorry to hear about your head gasket issue. So, I guess you're going to have to pull the head. If you do, be sure to check the head decking for pitting because the coolant has a tendency to put very small holes there. I had some minor pitting and had the machine shop to weld it. Then they came back with a minor machining to clean it up. Oh and you're very welcomed about the videos. I'm glad they will save you lots of money. Good luck on your repair and keep us posted of your results. Thanks!
I have this car, and am having misfire/headgasket issues... these videos are saving me hundreds of dollars and teaching me how my car's engine works. Thank you for your amazing videos!
Got everything apart and back together with no problems. The head was warpped but there was no additional damage, so got that into the machine shop. My friend helped me do the majority of the work, he replaced the timing belt while we were at it. My cam had a lot of wear (according to my friend and his dad), which is sad because I really took care of this car, regular oil changes and easy to moderate acceleration only. Car runs great now, appreciate these videos and your advice!
Excellent work firesickle! I'm glad to hear that everything worked out for you and that the car is running fine now. Thanks for the compliment on the videos and I'm glad that they helped you out!
Excellent Fikarizal! Glad to hear that your diagrams match up. So, you can go ahead and tap into the solenoid wire that I show to make sure that your voltage is correct at that point going to the solenoid. Good luck again on your repair and keep us informed of your progress.
No problem nowanda2nd...I've got just about all the parts in now and will get the head to the local machine shop once everything arrives. I'm looking to replace all the valves, valve guides and valve seals. Of course, the machine shop will check the head deck for warpage, cracks, etc. I'll keep you posted on the cost of parts and the cost for the machine work which shouldn't be that much. As for your last statement about a used engine, either way it's a fair amount of work. Well, ...
After all of the parts and a few extra bucks I payed my friend for his help, the replacement only ran me 600 dollars, which was very reasonable in contrast with the ~2000 dollar estimate a dealer gave me.
Thanks firesickle!!!! Just be sure to take your time and don't rush yourself. You'll have a SUPER great job in the end!!!
Clean and simple explanations. Appreciate it.
Thank you Frank for the comment!
Glad to hear your got her starting good now! There is nothing to reset on the ecu after doing a timing belt and water pump change. Of course for safety, you should remove the negative battery cable when you do this job. The only thing that the manual calls for is a idle relearn procedure which doesn't require a scan tool. I show the steps to perform in my video entitled "Suzuki Forenza Head Installation Part 10 (Running)". This is discussed in the very beginning of the video. Good luck fikarizal
Very thorough and very understandable..two things that are hard to get right when taping mechanic videos.. A++
Good question nowanda2nd! If you remember, I mentioned that both cylinders 1 and 4 fired at the same time, so it seems like I could go ahead and do 4 after I did #1. While the firing of both cylinders is true, this car like many uses a waste-spark ignition system. This means both #1 and #4 fired where #1 would be on compression but #4 would be on the exhaust stroke. So, the exhaust valves on #4 would be open, where on #1 all the valves would be closed since it's on the compression stroke...cont
Thanks stuzman52, your explanation cleared everything.
Thanks again for the great videos, I can't tell how precious these videos are! after watching the first and 2nd one, I couldn't quit watching the rest. And I should also thank your assistant/cameraman who is doing a great job in shooting the video and holding the light...cont
Thanks again! You are a champion amongst men! I will let you know after I get it all apart and have work done.
Wow! $1400 is a lot of money to be saving there firesickle. Not only that, but look at all of the stuff that you learned about your car. Great job firesickle!
Yes, i look up my car manual, the wiring diagram 100% match with forenza.Many thanks sir.
connector which has a wire going down to the solenoid. Measure the voltage at the wire that I'm tapped into while you're cranking the engine and see what your voltage is. This will confirm if your ignition switch is okay. If that's good, then it's time to take a closer look at the starter. I assume that with your car being hard to start, you mean that the solenoid is clicking sometimes or that your engine is turning over slowly. Good luck with your repair and thanks on the comments of the videos
So, that's why I had to turn it 180°, to get the next cylinder up on compression. The firing order as you may remember is 1-3-4-2. To determine how the coils are fired for any ignition system as this, split the firing order in half. For example, take 1 and 3 and write then down, then take 4 and 2 and bring them under 1 and 3. Look at them in a column. You'll see 1-4 and 3-2. That's how the coil packs are firing the cylinders. So, when #1 is on compression, #4 is on exhaust. Same for others.
I appreciate the kind words about the videos. Remember, these are for you and others, and if I can improve on something, or if I'm not clear on an explanation, let me know. Thanks again nowanda2nd!
One last thing nowanda2nd. I showe this method on a four cylinder engine of using 180° of crank rotation. If you have a 6 cylinder, then it would be 720°/6 or 120° of the crank. Or if you have an 8 cylinder, then it would be 720°/8 or 90° of the crank. Pretty simple eh! If you would like to know more about ignition systems or other electrical/electronics, let me know and I'll put some videos together using an oscilloscope and can discuss waveforms. Take care!
Very good Stein. Of course now, 42 is never too old, lol...
I own an 06 Forenza with 112K on it (fortunately had the timing belt replaced right after buying), but had no idea on how a timing belt is replaced and the extent of damages a broken timing belt can cause. I am also curious to know where you had/going to have the head machined, and how much it costs. Some people say it doesn't worth to fix bent valve and suggest buying a new/used motor.
Part 1.My 05 optra the same issue with the exception the belt did not break it jumped due to the fact that part of the water pump pulley came off ( a round washer type shield) it broke in 3 and one part was stuck on the timing pulley at the crank had to dig it off, you can se were the belt was running around it I removed the piece and the timing marks were way off I took the belt off re alighned all the marks and engine still turns rapidly no start so am I to assume bent valves,
If it turns out that the damage is on the upper part of the engine (head), then I would get the head fixed (valves, seals, etc). Now, if it turns out that the piston(s) got damaged, broken, etc., of course with the valves bent, then another engine would be cheaper. Otherwise, you'll have to rebuild everything and the cost would be up there. Oh, I appeciate you subscribing and if you see something that I can improve on, let me know. Smiling...I'll let the camera lady know of her great job!
Nice video, Thanks for posting on UA-cam.
I'm just curious why didn't you pressure test cylinders 1&4 and then turned the crankshaft 180 degrees and test 2&3? It should do the same or I might be missing a point?
Im using chevrolet optra 1.8,but i believe the engine looks like same ur forenza..sometime my car hard to start,btw battery still new and altenator is ok..im suspected the starter.do u hv any opinion on this matter?btw ur video really great sir..
Hi Fikarizal. The starter motor is located underneath the intake manifold over towards the driver side. If you don't mind, what issues are you having and thanks for watching?
Part 2. This car has 320,000 + km's or around 198,800 mi what would you recomend
So my timing belt pulley broke on my day off which was payday SO I spent my entire paycheck getting the car towed and a new timing belt kit installed only to come pick my car up and find out OH the valves are bent so I payed to have it towed into my driveway. Now I'm just stuck. Hopefully this video as I know it will helps. Thank you
I am surprised Nasrullah that the mechanic didn't check for bent valves since this is an interference engine. Have a great day!
@@stuzman52 you would think but they checked that after the fact
I must ask and thank you for your to respond, but do you think with bent valves the chances of damages in any other area being high and if so what might those problems be?
@@NP.TRU.09 Would have been better to check for bent valves before timing belt replacement, but at least you know now.
@@NP.TRU.09 The biggest issue of course is the valves being bent. But there could also be piston damage where the valves actually hits a piston. I was lucky that I didn't have any damage to pistons. The sure way method is to pull the head and look at the pistons to be sure there is no damage to the pistons. Another issue is that it's possible that a connecting rod could be bent especially if you're traveling at highway speeds when the belt broke. Again, you'll be able to see the difference in heights of the pistons with the head removed. Hopefully, your only damage is to the valves and not any bottom end damage.
How to remember the firing order on a 4-Cylinder:
13's too young
42's too old
yup he tested the wrong cyl
You should do a video on Emissions Control System on how to inspect and replace the Vapor Canister Vent Valve and Purge! Other then that Great vids, very informative. Keep up the educational work.
+Alejandro Almodovar Thanks Alejandro for the suggestion. It wouldn't be on this particular car as I sold it over two years ago.
+stuzman52 Can you show me a diagram of where the EVAP Canister Vent Valve on this vehicle is located?
Here is a link to a free service manual. Although the makes shown are different than a Suzuki, the data should be the same. You can take a look in the 'Service Manual' section. lacetti.com.ua/chevy-man/EN/documents/Nubira-Lacetti/start_Nubira-Lacetti.html
stuzman52 I will check that out and continue doing more research on it. Thank you, You the man!
Hi Fikarizal! If you're sure the battery and alternator is okay and your battery connections are alright, then try this. Do a voltage drop test on your negative battery cable. The positve voltage drop will be impossible because of the starter location. I'm not sure if the wiring diagram is the same on your car as mine, but you can take a look and see. Go to my video named "Suzuki Forenza Head Installation Part 9 (We're Done)" and watch the first six minutes. I show how to tap into a cont)...
Very well explained , and good viewing .
Thanks hunter and glad that you liked the video.
Lo Mejor es Poner La Bayoneta En El Cilindro que Hace Pareja para Comprobar el Cilindro este en su punto muerto superior y en el otro cilindro emparejado poner la manguera y acercar el dedo o el oido y sentir el soplo de la compresión cuando deja de hacer el soplo el cilindro esta completamente sellado en su PMS
Thank you for the comment Carlos and have a great weekend coming up!
awesome videos thanks
You're welcome!
Good video man. But fyi the wires are already labeled and will only reach one way. Too long or too short
where can i find the starter?TQ
134A Freon, still 2?, last one. this was my personal tip :)
How can I fix the tensioner to measure when the strap is new that I can not fix it ¿?
Yunior Marte I don’t understand what you’re saying. Sorry 😟
Hi Terry, hope your well. If you could help me out i would be very appreciative. I have a 2006 Chevy Optra 2.0L automatic (same as suzuki forenza motor you did head on). I have a P0300 random misfire code. I have taken the compression reading from each cylinder (cold) and the readings were off the chart 225psi ??????.........just wondering what the acceptable psi should be. My 2004 optra service manual states >=100psi . Any help would be appreciated as i am stuck at this first step in diagnosing this problem but it seems i may have a bad "BRAND NEW" LISLE 20250 compression tester. Thanks in advance Terry.
CanAm58 maybe lots of carbon on top of the Pistons is the only thing that I can think of. Maybe take a look at your fuel trims and see what's happening there. Also the valve covers on these engines leaks very badly around the spark plug wells to check around that and see if there's any oil seepage which can cause misfires.
Hey Terry thanks for your reply, but just wondering what a normal good PSI reading for this car should be (top level). Is 225 abnormal, i measured my tester(brand new Lisle 20250) with my air compressor and it was spot on upto 125psi (the max i can goto). Do you think the tester could be off above that if its spot on upto 125 ???
CanAm58 just as an estimate maybe 160 to 180. I wouldn't worry too much about it is it sounds like you have some other issues there. 🤔
No me convence la prueba del cilindro #1 Lo Mas Seguro es Que La Carrera Que Estaba en Compresión era la del cilindro #4
Hi. Just wonder if you can tell me what the problem is with my engine. cylinder 3 has only around 25 psi. And the rest 160 psi. The engine is tuned up from 150 hp to 280 hp. And the spear plugs is dry and werry white. Hope you can respond. Thanks from Norway.ua-cam.com/video/YlJduTNkIRQ/v-deo.html
Hi Saab...you could do a leak down test as shown in this video to see if it's the valves or the rings or worse the piston. Either way, you'll have to pull the head to see what's going on. But do the leak down test to see where your problem is.
hello
And hello to you Toyota.
Thanks for your reply. I sent you an email. I had a timing belt break event on Toyota Camry 1999 4.2 Engine (non-interference engine). My mechanic steer me to Reman Engine doing Leak Down test. I learned that he did the leak down test incorrectly. Your video helped me to get insight on this, but it did not save my old engine. I am not a mechanic, but this event/research helped me to learn .
Here is the thread describes the story. Does timing jump cause engine replacement?
www.toyotanation.com/forum/103-3rd-4th-generation-1992-1996-1997-2001/967097-does-timing-jump-cause-engine-replacement.html
Please review and share your insights.
Do you mind sharing published doc/info on "Leak Down Test" "Bent Valves", "timingbelt Break" for 1999 Camry?
Are there any other web resources to learn about it?
Toyota 21061 I read some of the threads and it appears that the mechanic didn't do a correct leak-down test. Since you have a non-interference engine, the timing belt jumping shouldn't have caused any damage to the engine. I know in the threads that cylinders two and three had low compression, but this had to be there before the belt jumped. At this point now since the engine has been replaced, it's hard to say if there was any problem with the engine.
The lead-down test that I show for the Suzuki can apply to all other makes and types of engines. The procedure is the same. It's good to hear that your car is back up and running. If you want to learn more about the mechanics of cars, there's a wealth of information out there. I would recommend two channels for diagnostics and troubleshooting which also discusses how systems work. Of course, I also try to demonstrate how systems work along with diagnostic procedures. The other two channels are 'ScannerDanner' and 'Schrodingers Box'. Good luck on your quest for knowledge in automotive repair.
stuzman52
Thanks.
Hello,
I have a question. If my mechanic send my old engine as core to Reman folks. Will they conduct engine health check? Is it possible to call for this report from Reman folks?
Thanks for your insights.