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Used pistons swap...B21F 200 1979

posted by  pierre on  Tue Jun 17 17:42 CST 2003
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last visit: Fri Oct 10 10:49 CST 2014
[RELATED]

Thanks for the "heads up", Roland...

I think we can pretty much rule out carbon deposits this time.

The head has 0 km. on it since I rebuilt it. It has mirror-polished combustion
chambers, valves and piston tops. Deposits-wise, it should be immune for a while...

Still, before opening the engine, I'll make sure, one last time, that the knock doesn't stem from something else than the wrist-pin/big-end bushing/piston.

My head has been milled .070", for approx. a 10.75:1 CR, making the engine an "interference" type with the high-lift "K" cam. The bad wrist-pin might be explained by a collision, months ago, between the valves and the pistons. My camshaft had seized and the timing belt was destroyed at crank-up...

Thanks for your kind help.






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