924martinirossi

I replaced the cam shaft assembly and the lifter chattter is still there. What are the chances that both assemblys would produce the same noise. Also I beleive there is a ball and spring valve inside the head (near #1 cylinder) that might be stuck and also could be what is causing oil not to pressurize the lifters.

Also does anyone know to test a lifter to see if it is functional before installing it?

All suggestion welcomed.

I was going to autocross this weekend, but think I better get the noise problem solved first.

Michael

Yabo

make sure its not loose exhaust manifold.

seb928s

You can test a lifter by pushing down on the center of it. If it moves then it's a bad lifter.

BMWM3PORSCHE944

I had all of mine replaced. Man it made the BIGGEST difference. From rattling like a machine gun to purring like a tiger cub....

924martinirossi

New exhaust and manifold gaskets replaced along with studs and new copper nuts.

Nope, it's not the manifold.

924martinirossi

Next question:

Will driving the car due any "serious" damage?

Michael

Peckster

It depends on what's causing it. Old lifters won't. Low oil pressure might. What do you mean by cam shaft assembly?

924martinirossi

Camshaft assembly is the part that bolts on top of the head and contains the lifters and cam.


Oil pressure is 5 bar on start-up and drops to 3 bar when the temp reaches the second mark.

Swagger93

I had a really bad tick from a few lifters on my 9000. I pulled the motor, put a turbo on it, put the motor back in and it now makes no noise. I didn't take anything apart on the engine, didn't even pull the valve cover.

Turbos are a good, multi-purpose tool.

Hehe.

924martinirossi

Pulled off the cam assembly this morning and found two bad lifters. The button can be pushed down very easy.

seb928s

Yep those are the bad ones. Replace with a known good ones and you are set.

924martinirossi

Got it all back together and the noise has disapeared!