Posted by JRSutton on October 18, 2011 at 14:42:04 from (75.130.109.233):
In Reply to: Re: 301 gas issues posted by JRSutton on October 18, 2011 at 14:36:10:
just read through some of the other answers here - the problem isn't if the gap between the rocker and the valve isn't to spec - I agree, that the gap could be huge and it'd still run (worn lifters).
The problem is when the valves themselves wear into the head and there's NO gap at all between the stem and the lifter. Then they can't close tightly - especially once they warm up and expand. Then they can actually leak a little causing all sorts of trouble.
Again - bit of a long shot - but easy and free to test, so I say why not just rule it out.
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