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Old 12-04-2012, 07:26 PM
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CALWATERBOY CALWATERBOY is offline
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Location: San Francisco
 
Join Date: Aug 2009
Posts: 10,007
Mein Auto: 2009 E93 N54
Quote:
Originally Posted by galahad05 View Post
What is head R&R?
Remove and Replace the cyl head [with valves] for valve bench cleaning. Might be useful if one were to port the valves, check spray patterns, etc. Excellent for inspection - there's some validity to it, but it's thin ice.
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