Topic: Re: 820 valve setting
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The setting isn't that critical. Better a little extra clearance than too little.
The purpose of that little bit of clearance is to ensure that the valves still close as the engine and all components heat up and grow. Your cam rolls around and opens and closes the valves... So think about it. The purpose of that gap being to be certain the valves close... how much difference is .005 gonna make and what will it effect?
In these big old things I really can't think of any component that extra clearance isn't a better thing or lesser of the evils as compared to too little clearance.
Anywho... regardless. Shoot for the .02 and you'll be fine. Odds are you'll vary a little in your readings anyway. And cam bearing clearances that won't be apparent when rolling over and checking without a real load will give variation. Better to be certain that valve closes and get all the compression and avoid frying a valve and seat than to come up short on clearance.
Have a good one...
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