m42 knocking

[series88]

Mine was a bad oil pump

[timofeylbelarus]

yes i did change that bolt to a longer one that's supposed to go with the new guide, i will get the video as soon as possible, just been really busy with work.

[jntar]

To me that sounds like valve/hydraulic lifter ticking. It could also be a rod bearing, but it's not so much a knock like most damaged rod bearing sound.

The lifter issue can be due to oil starvation or wear. Generally from oil starvation. This may be worth reading.

http://www.m42club.com/forums/showthread.php?t=594

[roguetoaster]

Of course it could always be the chain system. When you redid the system did you use the updated DS long chain guide? If so people often forget to change the upper bolt and this can cause the bolt to come loose, which could of course be stuck somewhere and grinding on the chain. However, the video will give us a chance to really diagnose the issue.

[timofeylbelarus]

ok i will check that thank you

[gr8skyr]

There is an oil pick up tube ( don't know the technical name) inside the oil pan that can come lose on the M42. Happened to my buddy's. Will knock because engine is starving for oil. Take your oil pan off and see if everything is as it should be. On his, the bracket that holds the tube, or the tube itself was in peices at the bottom of the oil pan. Got it fixed up and it ran perfect. Pretty easy if that is it.

[timofeylbelarus]

i will try to get a video tomorrow

[timofeylbelarus]

http://www.youtube.com/watch?v=rXVS6VPqGzI

[timofeylbelarus]

my m42 is making a weird knocking noise that sounds like its coming from the valve cover, i have rebuilt the timing case almost a year ago, and it ran perfectly fine,
sounds sort of like this but you can't hear it at idle