Hey everybody,
I just had a quick question regarding the engine in the 1981 Corvette. Is it interference or non-interference? I am guessing it is non-interference but wanted to check.
The reason I am asking is because I am considering how important it is to get the timing chain replaced. I understand that the 81 Corvette has a nylon timing gear and that is what concerns me.
The piston 'cut-outs' are not exactly deep, certainly on a stock engine with stock valve lift. Allowing for manufacturers safety margins it would be interesting to get confirmation of 'interference'.
The piston 'cut-outs' are not exactly deep, certainly on a stock engine with stock valve lift. Allowing for manufacturers safety margins it would be interesting to get confirmation of 'interference'.
The cut outs are for clearance with the timing working correctly, if something goes bang then a valve at full lift and piston at TDC will bring them closer together than they would otherwise be in correctly functioning engine.
On an engine like an A Series where the valve is perpendicular to the piston crown you’ve got the whole depth of the combustion chamber before the valve hits a flat top piston. With an inclined valve like the SBC that’s much reduced.
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