If you do replace the lifters, I'd keep the same tray.
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S52 Engine Screeching Noise Issue
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Originally posted by Northern View PostI'd try to blast through whatever crud is there with some carb cleaner or something similarly strong. Soak a bit then blast it through with some compressed air.
Rinse and repeat and hopefully it will come back.
Alternatively you can remove the clip that holds the ball and spring. I'm not sure how tight it's going to be/if you risk damaging the retaining piece - this pic is from one that wasn't seated right from the factory that I managed to work loose with a pick. The ball and spring are tiny so be careful not to lose them
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I put the head back on and started it, same noise. I pressed in on the clutch and it went away. So I knew it had to be in the clutch. I removed the transmission replaced the pilot bearing and throw out bearing, re-installed all the clutch parts. Nothing looked damaged and the only thing not replaced was the clutch fork and the slave cylinder.
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The sound sounds at engine RPM and not 1/2 speed from cams / valve train.
Are your crank hub bolts too long?Last edited by moatilliatta; 07-20-2021, 02:54 AM.
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I know this is a lot of work but have you run the engine with the transmission out of the car? If the noise is still present then remove the clutch disc + PP....still present then remove the flywheel....and go from there.
Still curious what transmission set-up is in the car. Doesn't the back side of the M20/G260 flywheel rub the M5x/S5x oil pan without machining the back of the flywheel slightly?
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Originally posted by mjweimer View PostI know this is a lot of work but have you run the engine with the transmission out of the car? If the noise is still present then remove the clutch disc + PP....still present then remove the flywheel....and go from there.
Still curious what transmission set-up is in the car. Doesn't the back side of the M20/G260 flywheel rub the M5x/S5x oil pan without machining the back of the flywheel slightly?
This is the clutch I have in it https://www.ecstuning.com/b-valeo-pa.../52401220~val/Last edited by Lights; 07-20-2021, 03:52 PM.
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I'm having the same problem and this thread really saved me money i was about to buy another tranny but now i will keep my focus on the flywheel, clutch set up and both pilot and release bearings.
Maybe it is block to transmission alignment problem or clutch to input shaft alignment... Since m5x sets on diffrent angle in e30s.
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Originally posted by ADEN View PostI'm having the same problem and this thread really saved me money i was about to buy another tranny but now i will keep my focus on the flywheel, clutch set up and both pilot and release bearings.
Maybe it is block to transmission alignment problem or clutch to input shaft alignment... Since m5x sets on diffrent angle in e30s.
The other thing I read is the slave cylinder has a push rod that has different lengths for different engines but I can't see how that would be making the noise unless its grinding/ rattling against the clutch fork.
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Originally posted by Lights View Post
I'm thinking the input shaft on the transmission could be messed up or the flywheel and clutch setup won't work. I can't find anywhere about anyone using a M54 330i E46 flywheel and clutch on an S52.
The other thing I read is the slave cylinder has a push rod that has different lengths for different engines but I can't see how that would be making the noise unless its grinding/ rattling against the clutch fork.
For your case push rod thing if it is touching the release bearing you would feel it by gears slipping or car starts moving when your foot at the top of the pedal travel.
If you can get your hands on a used DMF with clutch kit i think m5x came with DMF and read that people who converted to single mass complained some issues including noises.
Last edited by ADEN; 07-21-2021, 12:49 PM.
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Originally posted by ADEN View Post
For your case push rod thing if it is touching the release bearing you would feel it by gears slipping or car starts moving when your foot at the top of the pedal travel.
If you can get your hands on a used DMF with clutch kit i think m5x came with DMF and read that people who converted to single mass complained some issues including noises.
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