Hi, I've had the head skimmed on my 1985 VW Passat 1800CL. Since doing that I've noticed that the two engine timing marks, one on the fan belt pully and the other on the intermediate camshaft sprocket, which should be aligned with each other cannot be because reducing the head has moved the main camshaft sprocket (on the head) closer to the intemediate camshaft sprocket and since the two are connected with a toothed timing belt aligning them is no longer possible. The head has not been reduced by more than that given in the specification. So my question is should I have used, if such a thing exists, an oversized head gasket to make up for the reduction in the head or shouldent the difference matter. The marks are out by about 3mm.
I'm trying to find out why my engine is running lumpy after having the head skimmed. I've overhauled the ignition and the carburettor without result. Many thanks.
Roger