PeachParts Mercedes-Benz Forum - View Single Post - need advice with diagnosis

whunter · #3 06-13-2012, 10:26 PM

I am seriously concerned from your description.

Pull the valve cover.
Crank the engine around until the camshaft timing mark is aligned.
Now take pictures of the harmonic balancer, we need to see the timing numbers.

If the base timing is good, it may be a bad timing device, fuel or fuel system issue.

For the moment the possible list is to large.
Brief Example:

* Extreme bad fuel and/or infestation.

* The vacuum pump came apart, dropping pieces between the chain and crankshaft sprocket?

* The timing chain tensioner failed, allowing the chain to skip teeth - loose timing?

* Broken valve guides?

* Failed - damaged timing device?

* Head gasket failure?

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