Quote:
Originally Posted by ol'George
With .020 clearance it will be slightly noisy.
.020 is really not all that much as some of the old chevy solid lifter engines ran as much as .030 with no ill effects......
.....Best to run it till it needs to come apart for rings/overhaul.
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No.
I strongly disagree.
Quote:
Originally Posted by ol'George
The valves on those twins have no easy adjustment.
To decrease clearance you have to seat the valve deeper into the head, or replace the valve.
To increase the clearance, the valve stems need to be ground.
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This, however, is correct!
Quote:
Originally Posted by dvogtvpe
one thing also to consider is the change in the intake opening and closing position. anyone who has spent time with a dial indicator and a degree wheel can understand the affects of 2 degrees of timing in how an engine runs. We often close up the exhaust lash in stockers to help with torque.
increasing the intake lash would also have and adverse affect on the split overlap at tdc. since its an opposed engine I would run the same lash on each side. loose lash can also hammer on the lifters and the cam. everything wears , the looser it is the more it wears . if you have it apart yet I'd replace the valve
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Right answer.
Quote:
Originally Posted by Sam Mac
OK we now have a whole new situation to deal with. Just my 2 cents but the rebuilder needs to replace the valve that has too much clearance.
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Solution!
