Hi guyz,
Here is the tensioner info, hope it helps...
Timing Chain tensioner
Time = 30 minutes Task=Easy
A low pitched rattling from the engine, which may be temperature related, usually is caused by the hydraulic tensioner used to tension the timing chain. This can be checked by listening to the timing cover with a screwdriver held against the ear, although the noise can be more pronounced inside the cabin compared to the general racket in the engine bay!
Tensioner and cap in-situ
The tensioner is located on the RHS of the head and is fitted with a 19mm head cap (see above). The job is a direct swap, takes less than 5 minutes and the part is inexpensive from BMW (~£35, $40). A redesigned part was used in the M44 and is useable in the M42:
Timing Chain tensioner part # (new type) : 1131 1 743 187
Timing Chain tensioner washer part #: 07 11 9 963 355
The swap simply requires the removal of the cap and old tensioner. I found the easiest way to get to it was from underneath with a torque wrench or extended tommy bar - but some may need to access it from above (removing the washer reservoir will help). Some oil will come out too. Take the old tensioner out from the cap and install the new one in an identical manner. Check the washer on the cap (its the same as the washer on the oil sump drain plug) and reinstall.
Start the engine and run it at ~3000 rpm for about 20-30 seconds. You will hear the noise of the chain running on the nylon guides but it will disappear. You can see in the photo how the new tensioner is compressed before use. When the engine is started, the oil pressure pushes it out.
Also see photo's on the E30 Network technical page.
Topic: BMW m42 gasket set? (Read 4453 times)