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*C-10 simplex* · 09-26-2010, 05:00 PM

The only time i revved the engine above 3500 was when i was doing some 1/4 testing and that was only once and it was about 6 months before the engine started acting funny.

a) i'm probably leaning towards improper installation/adjustment of #4's exhaust rocker/lifter also, but just as an outside possibility, i noticed that in the very first picture every valve spring top(not sure of the proper name) has oil on it EXCEPT for #4 exhaust. What's the possibility that the valve got starved of oil and got stuck in the open position thus causing the piston to strike it?

2) What i was trying to get at as far as "cleaning up" and trying to re-use the piston was i could see why now maybe this particular, #4 piston might need to be replaced, but why would all of the pistons need to be replaced/ crank and block machined/heads rebuilt etc. if it's just this one piston?

09-26-2010, 05:00 PM	#6
C-10 simplex Account Suspended Join Date: Dec 2008 Location: indisclosed Posts: 1,515	Re: Let's rebuild a 350 (maybe), PT.1 The only time i revved the engine above 3500 was when i was doing some 1/4 testing and that was only once and it was about 6 months before the engine started acting funny. a) i'm probably leaning towards improper installation/adjustment of #4's exhaust rocker/lifter also, but just as an outside possibility, i noticed that in the very first picture every valve spring top(not sure of the proper name) has oil on it EXCEPT for #4 exhaust. What's the possibility that the valve got starved of oil and got stuck in the open position thus causing the piston to strike it? 2) What i was trying to get at as far as "cleaning up" and trying to re-use the piston was i could see why now maybe this particular, #4 piston might need to be replaced, but why would all of the pistons need to be replaced/ crank and block machined/heads rebuilt etc. if it's just this one piston?