ChinaRiders Forums - View Single Post - RX3: Engine Top End Rebuild at 22,450 Miles

rjmorel · 05-01-2017, 01:18 PM

Question about receding valves? What are the causes? Is the valve seat hammering into the aluminum head? Seat hole in head machined to deep allowing it to get hammered in farther till it bottoms out in hole? Seat or valve material to soft so angles wear out prematurely. Running bad gas? Freeway driving where throttle is close to wide open most of the day?
I take it ,it mostly isn't something an owner would do to cause it?
Can't say how my vales are behaving cause I think I went about 7000 miles between last adjustment and it ran fine, but was occasionally dying when coming to a stop on Baja trip. Had CSC adjust them when we got back and runs great at 14,200 miles on it now. Mine was 2nd batch when price went from $2895 to $3495. Still the most fun money I've ever spent. rj

05-01-2017, 01:18 PM	#56
rjmorel Join Date: May 2007 Location: Warshington Posts: 928	Question about receding valves? What are the causes? Is the valve seat hammering into the aluminum head? Seat hole in head machined to deep allowing it to get hammered in farther till it bottoms out in hole? Seat or valve material to soft so angles wear out prematurely. Running bad gas? Freeway driving where throttle is close to wide open most of the day? I take it ,it mostly isn't something an owner would do to cause it? Can't say how my vales are behaving cause I think I went about 7000 miles between last adjustment and it ran fine, but was occasionally dying when coming to a stop on Baja trip. Had CSC adjust them when we got back and runs great at 14,200 miles on it now. Mine was 2nd batch when price went from $2895 to $3495. Still the most fun money I've ever spent. rj __________________ Live Zong, and Prosper
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