Quote:
Originally Posted by maslin
It would still run, but a 4 cylinder missing one cylinder is really really rough.
Unless the valve hits just right, breaks off, turns just right to bind the piston and bend a rod. Then it might stop running.
The likelyhood of a valve spring failing is very low, even on the effected engines. The likelyhood of multiple springs failing at the exact same time is basically zero.
Always a good idea to put the VIN in the NHTSA website and make sure there aren’t any outstanding recalls. If it’s at the dealer they will obviously have been taken care of.
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Hmmm...… well, may I clarify. If you pull a COP off of a FA20 engine, you will have a "rough" running engine.
Since (like @
Tcoat pointed out) this engine is an interference type engine, therefore, I would speculate that if a valve spring failed to pull a valve out of the way of a piston head that coming at it and the head of the valve and the head of the piston collide, I wouldn't call the result a "running engine". -
Not like dropping a valve on a 9:1 compression OHV big block V-8, where the combustion chamber might have the space just to play with the piece of broken off valve for a spell.
Is it my med time yet -
humfrz