My advice is always 12 thou on inlets and 15 thou on exhausts. This allows the exhaust to have enough clearance to close up a little when it gets HOT.
Tappet Gap
Started by
micrawavewindow
, Mar 01 2010 09:11 PM
17 replies to this topic
#16
bmcecosse
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Posted 02 March 2010 - 02:32 PM
#17
Guess-Works.com
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Posted 02 March 2010 - 02:38 PM
The tappet clearance is also a product of the rocker ratio...
All the figures above relate to standard rockers ( assume 1.25:1 ratio )
Personally I set clearance @ 14 thou on the above ratio...
All the figures above relate to standard rockers ( assume 1.25:1 ratio )
Personally I set clearance @ 14 thou on the above ratio...
#18
lrostoke
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Posted 02 March 2010 - 02:50 PM
Just out of interest would 14 thou be recommended by the gurus for a 998 on standard valves as well ???? I'm just following Haynes at 0.30 (13 thou) at the moment !!
Although I suspect accounting for wear in the comments and how much drag you call correct on your feeler gauges difference between 13 and 14 thou could be very little ???
Although I suspect accounting for wear in the comments and how much drag you call correct on your feeler gauges difference between 13 and 14 thou could be very little ???
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