Mitsubishi Pajero Engine Failure Part 1 - Generation 4 Pajero / Montero / Shogun
Traveling Banker (choppa)
29,014 views
Engine issue with 3.2 4M41 common rail diesel in 2008 NS Mitsubishi Generation 4 Pajero / Montero / Shogun
Taking off from the lights on the way home from work and lost engine power. There was no big bang, but it was smoking like a chimney and felt like it was running on 3 cylinders. Dipstick was pushed out of the sump and oil everywhere under the bonnet.
I suspected a cracked piston from the outset and this video covers the troubleshooting process I went through to determine the problem and cause:
• Compression test (remove upper inlet manifold and glow plugs)
• Injector inspection (remove rocker cover and injector)
• Inlet ports inspection (remove lower inlet manifold)
• Bottom end inspection (sump removal)
• Exhaust ports inspection (remove EGR cooler, turbo, exhaust manifold)
• Cylinder inspection (remove timing chain sprockets, camshafts, cylinder head)
In the end, I decided to replace the failed engine with a low mileage NX (pre-DPF) engine, which I’ll cover in part 2
Disclaimer:
Working on cars can be hazardous.
The content in this video is for entertainment purposes only.
Any service steps and specifications shown is not intended to be a substitute for experience and professional services.
Please do your own due diligence and do not rely solely, if at all, on anything shown in this video
20 Comments
One thing I noticed was your earth cable on your NS is still in the factory position. There was a Mitsubishi service bulletin that went around (I believe) to swap it to the intake side. I moved mine over and to my surprise it reduced the in-cabin engine noise considerably.
What is the coolant hose tool you have. Does it fit all sizes? Is it homemade?
Looks like you used a strap to hold the chain up as you removed the head. I remember seeing in the service manual that Mitsubishi has a special service/dealer tool which bolts-in and holds the chain up for you, but you’d probably have to fabricate up a steel bracket as they normally don’t sell tools like that to the general public.
Absolutely fantastic detail. Can’t wait to watch part 2.
What were the symptoms before the catastrophic? Also with a mechanical mind, I am sure you cared well about this vehicle, and how did you end up in this situation?
Not bloeing smoke and runs good on highway.
But at idle i can hear a tinging noise from around number 1 injector . I put a stethescope on number 1 injector pipe and the tinging noise is much louder through this . Plus in my opinion it has some blow by more than normal . Others have said its normal. But i can feel it easily if i hold my hand at 300mm above the filler cap with cap off. So im not sure where to start on this thing.
Btw how did yours crack a piston?
Excellent video mate thanks
If you have any advice on mine please throw me some hints
Mitsubishi Pajero Engine Failure Part 1 - Generation 4 Pajero / Montero / Shogun
Traveling Banker (choppa)
29,014 views
Engine issue with 3.2 4M41 common rail diesel in 2008 NS Mitsubishi Generation 4 Pajero / Montero / Shogun
Taking off from the lights on the way home from work and lost engine power. There was no big bang, but it was smoking like a chimney and felt like it was running on 3 cylinders. Dipstick was pushed out of the sump and oil everywhere under the bonnet.
I suspected a cracked piston from the outset and this video covers the troubleshooting process I went through to determine the problem and cause:
• Compression test (remove upper inlet manifold and glow plugs)
• Injector inspection (remove rocker cover and injector)
• Inlet ports inspection (remove lower inlet manifold)
• Bottom end inspection (sump removal)
• Exhaust ports inspection (remove EGR cooler, turbo, exhaust manifold)
• Cylinder inspection (remove timing chain sprockets, camshafts, cylinder head)
In the end, I decided to replace the failed engine with a low mileage NX (pre-DPF) engine, which I’ll cover in part 2
Disclaimer:
Working on cars can be hazardous.
The content in this video is for entertainment purposes only.
Any service steps and specifications shown is not intended to be a substitute for experience and professional services.
Please do your own due diligence and do not rely solely, if at all, on anything shown in this video
I’ve been following you awhile and you do some really excellent Pajero videos and conversions. Doing a couple of videos myself, I know just how hard it is to film every step, correct angles and not skip over things in frustration so kudos to you there again.
One piece of advice that might help someone even more so: do you think you could you put the chapters in the description so YouTube chapters / sections the video correctly to help others search. Eg, Upper / Lower manifold removal, EGR Cooler removal, Turbo removal, Sump removal, Injector removal. Etc.