Recently I helped a friend do an S50 swap into an 88' 325is using the original g260 transmission, and the clutch makes a grinding noise like a nail on a chalk board upon engagement when starting from a stop. The car has the stock M20 single mass flywheel (just machined down on the backside) paired with a Clutch Masters FX100 kit to help cope with the extra torque over a stock m20 clutch. The rest of the time it works fine, such as driving/shifting while moving or even driving aggressively, but engagement upon pulling away from a stop it will make the grind/screech noise (especially when giving extra revs) unless the clutch is carefully engaged without any throttle.
I checked with Clutch Masters and didn't get much help from their customer service. Is it the compound of the disc that would cause the noise? The pressure plate is just a beefed up version of the stock Sachs m20 parts, and the throwout bearing is a stock e30/e36 Sachs unit based on the part number, unless the throwout bearing isn't up the task? The break-in instructions were followed, pilot bearing is new, and clutch hydraulics have been bled to rule those out. As a side note, I had this same issue with my e30 with another example of this same kit, and eventually swapped in an e36 M3 clutch and DMF to get rid of the problem (but using a ZF320 instead).
As a backup option, does anyone know if the 240mm e36 m3 clutch and DMF fit inside a "1346"/325i g260? I saw in a StanceWorks video that they used an e36 M3 clutch in their g260 s52 swap, but wasn't sure if it only works with the deep eta bell housing version versus the 325i single mass version.
I checked with Clutch Masters and didn't get much help from their customer service. Is it the compound of the disc that would cause the noise? The pressure plate is just a beefed up version of the stock Sachs m20 parts, and the throwout bearing is a stock e30/e36 Sachs unit based on the part number, unless the throwout bearing isn't up the task? The break-in instructions were followed, pilot bearing is new, and clutch hydraulics have been bled to rule those out. As a side note, I had this same issue with my e30 with another example of this same kit, and eventually swapped in an e36 M3 clutch and DMF to get rid of the problem (but using a ZF320 instead).
As a backup option, does anyone know if the 240mm e36 m3 clutch and DMF fit inside a "1346"/325i g260? I saw in a StanceWorks video that they used an e36 M3 clutch in their g260 s52 swap, but wasn't sure if it only works with the deep eta bell housing version versus the 325i single mass version.
Comment