HI, I just bought a 1992 W140 with an M104 engine. There is no oil getting to the lifters. Sounds like a tin full of bolts rattling around in there. Lifted the cam cover and no pump up in almost all of the lifters. So, hwere is the oil feed to the hydralic lifters, and what is the best way to clean it out without deconstucting the engine/head to its component parts. Thanks
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Your Wisdom and Advice Needed on M104 - No oil to lifters
- Thread starter MercyMerc
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What's the oil pressure like at idle?
Overall oil level, condition etc.?
Not too familiar with this engine but just thinking of the basics first.
Also found this which might answer your question about the oil path:
I hope the quality of the video content is better than his spelling...
Overall oil level, condition etc.?
Not too familiar with this engine but just thinking of the basics first.
Also found this which might answer your question about the oil path:
I hope the quality of the video content is better than his spelling...
Last edited:
Thank you so much Terry, fanatstic video. Really helped and it gives me an idea how and where I might put some compressed air into blow back through the system and clear anyblockage out. Re your questions, oil pressure is good at idle. New oil and hardly any miles on it since service.
I have learned all of the 24 buckets are dry of oil when cold and hot. Leading me to deduce that it is a critical blockage in the oill pathway.
Apart from putting compressed air through a cam oil opening, probably second bearing from the front of engine, I plan to put diesel oil in and a lifter cleaner and run the car a few hundred miles and see if it cleans it out. Then redrain the oil and refill., Cheers Gary
I have learned all of the 24 buckets are dry of oil when cold and hot. Leading me to deduce that it is a critical blockage in the oill pathway.
Apart from putting compressed air through a cam oil opening, probably second bearing from the front of engine, I plan to put diesel oil in and a lifter cleaner and run the car a few hundred miles and see if it cleans it out. Then redrain the oil and refill., Cheers Gary
Are you getting any oil to the cylinder head? Do you see oil coming from the cam bearings? Did anyone recently replace the head gasket?
Remove the oil cap when the engine is running and confirm oil is pumping up there it will be very visible and splashing around.
Has the car been driven for say 40 minutes? If not this and a lifter oil additive would be the first thing to try before tearing into anything. Some m104s can be like this and make an awful racket until driven for a bit then as long as they don't sit for months after they are normally fine again.
Has the car been driven for say 40 minutes? If not this and a lifter oil additive would be the first thing to try before tearing into anything. Some m104s can be like this and make an awful racket until driven for a bit then as long as they don't sit for months after they are normally fine again.
Hi, and thanks. Car was sitting for several months, the was given an oil change about 4 months ago. Then it sat again. I bought it rattling and drove it home (over 2 hours) and it was probably as bad or slightly worse than when I started out. At the moment, I have the rocker cover off and blew air throgh the cams. all clear. Then I plan to put in lifter cleaner and diesel oil 5-30 w as this apparently has detergents. But first, I will be checking there is oill flowing through the cams with the cover off. Cheers Gary
