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Re: Re: Re: Do I need to adjust my valves on an H?
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Posted by Ron in Nebr. on April 03, 2004 at 00:53:59 from (65.172.143.221):
In Reply to: Re: Re: Do I need to adjust my valves on an H? posted by CNKS on April 02, 2004 at 19:37:41:
Not wanting to start an argument here, but if the valves are at .015" hot and they're supposed to be at .018" hot, they're still closing fully. They'd still be closing fully if they only had .005" hot clearance. As long as there is clearance between the rocker arm and the valvestem when the cam is on the base circle, the valves are closed.
The deal is, they won't be closed for quite as long of a time, and, more importantly in some cases, they will be opening farther. Some engines have very little clearance between the valve and the piston at full valve lift and it doesn't take much over specs to have them touch and bend the valve. Doubt the H's were that close, but it's still best to set them to specs(either right on for hot or add .002" for cold.
A good way to set them "hot" and be able to have the temp right is to get everything taken off beforehand and just set the valvecover back on to contain the oil splash, then run the engine with a blanket over the radiator/grill shell so it can't get any air. It'll warm up plenty fast that way and you can get them set/checked before it cools enough to make a difference. Cast iron retains heat for a good amount of time.
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