10-03-2006, 10:09 PM
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CC Member
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Join Date: Nov 2000
Location: Dayton,ohio,usa,
Posts: 69
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Not Ranked
Broke 390 FE timming chain, WHY?
I just put together a 390 FE engine. Nothing wild 9.5 to 1 pistons a flat tappet camshaft, single 4bbl, aftermarket intake, and all the rest stock. I drove it for about 100 miles with no trouble. It then quit and I discovered a broken timming chain and the crankshaft timming gear had all the teeth stipped off. the chain was still hanging on the cam gear. The break in the chain was in the part that was hanging on the cam gear. The chain was a stock type of chain with steel gears. The engine had plenty of piston to valve clearance.
What would cause this type of problem and what other damage might there be?
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