S50 wierd noise. Help Diagnose (vid)

[graphikg]

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

I am putting this on all forums only because I am desperate and want someone to help me find the problem.

The way the motor sounds in the video is how it sounds in person.

[balooshinakus]

Sounds like it could be the lifters to me. I'm not sure at what point it becomes an issue, I have some ticking at the track and it sounds like it's pretty normal with these issues. Yours is ticking a lot more then mine does though.

[Schwarz325]

these cars have hydraulic lifter, i don't think they'd make that much noise. Sounds like your vanos is shot.

[e30m3s54turbo]

Sounds like you bent the valves by over rev.. or mist shifting.

[graphikg]

Sounds like it could be the lifters to me. I'm not sure at what point it becomes an issue, I have some ticking at the track and it sounds like it's pretty normal with these issues. Yours is ticking a lot more then mine does though.

Mine doesnt just tick, mine sounds like a diesel engine. I think it may be something to do with lifters, but doubt that all that noise is just a few lifters.

Sounds like you bent the valves by over rev.. or mist shifting.

The car has been overrevved. But I took the head apart after that - I had the head machined, and checked for lifter issues. The shop stated that they could find nothing wrong with the head even after I told them that it was over-revved. Just to let you know, this sound was exactly the same sound before all the work was done. --- Nothing has changed since replacement of the HG, and resurfacing and checking the head.

these cars have hydraulic lifter, i don't think they'd make that much noise. Sounds like your vanos is shot.

To add to above, I rebuilt the vanos with the beisan systems kit. I should have discounted the vanos as an issue too. I did not want to take the motor apart and put it back together just to think Vanos may be the problem, so I rebuilt it.

[Danny]

Loose spark plugs

[ed94r]

Do you have the early or late style intake cam gear? The later models have thrust washers and springs that the early lack. Mine sounded exactly like yours until I put the late style cam gear..

Ed

[xwill112x]

get a technicians stetho and find where its comming from?

[graphikg]

Ed, can you explain? Are you talking about the cam gear that bolts into the cam and connects with the Vanos gear? Or are you talking about the gear that is wrapped around the secondary chain it shares with the exhaust gear?

How can you tell the difference b/w the cam gears and why would that be the reason for the noise (in your case at least)?

[Fusion]

What's that smoke?
It does sound like Vanos though (yea, I read what you wrote), check http://www.drvanos.com/index.php?opt...d=11&Itemid=10

[ed94r]

It's been a long time but...there was a BMW TSB to replace all early cam gears with later units due to "noise". The cam gear referenced is the Vanos gear on the intake side. The best way to look at it would be on realoem, look up an early 93 Vanos cam gear, then look at the 96+ arrangement. You'll see the difference there between the thrust plates and spacers, and also that the 93 arrangement has been superseded by the later hardware.

Dr. Vanos also sells the update kit for early models. I just bought the parts from BMW. I really think this is what you've got going on.

Ed

[BMW_TUNER]

You Lifter are shot. YOu can rebuild them yourself but it is likely that they took the hit with the over rev. Did the machine shop check the lifters or just the head?

[madjurgen]

How do you rebuild a lifter?

[FredK]

I thought the procedure to test a lifter was to allow them to pump up, pull the VC, then push down on them?

They don't get rebuilt, they just get replaced, as far as I know. That IS a wicked rattle, though.

[graphikg]

More and more, I am thinking lifters. Can the car run for a little like this?