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Why oversize stem, valves? (archive)
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Posted by Dibs on February 20, 2001 at 07:22:15:

In Reply to: Re: TB's/Valves yes, seats part of head.yes! posted by Angus on February 19, 2001 at 21:41:24:

Cool. That's how I've done things with my M20's, but when it came to the S14 - my local dealer gave details of the oversize valve stem valves. But nothing on guides.

Come to think of it - you've got a point, the guides on a S14 head would be no different to that on any other engine (in principle).

Why are the oversize stem valves listed/used? If new guides are fitted and then reamed - surely one could ream to an exact size? 16 valves (of the 1st oversize or even normal) are a shit load of money - I would expect having the guides replaced to be cheaper.

Any thoughts?


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