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Posted by: larss Sep 26 2014, 08:14 AM

For a stock 1,7 with new valve guides is there a known inner dia specification?
Or lets say the valve stem is 7,95mm is there a clearance to the inner dia of the guide to aim for?

Looking for recommendation on both inlet and outlet valve guides.

Thanks

/Lars S

Posted by: pilothyer Sep 26 2014, 09:03 AM

The factory specs for the intake valve stem OD is 7.94 to 7.95 with the valve guide ID being 8.00 to 8.02 with a wear limit of 8.06.
The exhaust valve stem OD is 8.91 to 8.92 with the guide ID of 9.00 to 9.02 with a wear limit of 9.06.
You want the stem to fit in such a way as to allow no tipping

Posted by: larss Sep 26 2014, 11:21 AM

Many thanks Pilothyer!


/Lars S