After getting my cylinder head rebuilt, I installed it and had trouble setting the timing (see my earlier thread). Well to facilitate getting it right I removed the cam followers again (so all the valves stay closed and I can easily rotate the camshaft) and the engine is still hitting something at both TDC no.1, and if i turn it halfway around it jams at TDC No. 2. With all the valves closed, the only thing I can think of is that they milled the head too much and / or didn't reseat the valves sufficiently. The machine shop was recommended by the Mercedes shop I usually go to, so they ought to know what they are doing. But I can't think of any other reason for this interference.

Even if this problem were fixed, what about the prechambers? will they hit the top of the piston? (they're the old flat kind).

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kalpol
79 280SE
82 Fiat Spider 2000
81 Fiat Brava
04 BMW R1150RT
96 Jeep Grand Cherokee