Head Gasket Procedure - wr426
Posted September 04, 2012 - 06:49 AM
My bad, rebuilt tranny and didnt tighten head to spec. The bolts on the right side of head could be tightened about 1/2 a turn? Suspect head bolts under cam area loose too?
No coolant in oil.
Any advice on rebuilding the head again? Have a used yz426 head as back up if mine is warped. I learned my lesson and appreciate any procedure to follow.
Posted September 04, 2012 - 06:51 AM
Posted September 04, 2012 - 12:33 PM
Posted September 05, 2012 - 04:45 AM
Posted September 05, 2012 - 11:21 AM
Apply moly disulfide grease (moly assembly lube) to the threads and under the bolt head. Torque to 22 ft. lbs. Remove the bolts and re-apply moly grease. Torque to 14 ft. lbs then an additional 1/4 turn each, and then again an additional 1/4 turn each (a total of 1/2 turn past 14 ft lbs). Done
Edited by bg10459, September 05, 2012 - 11:22 AM.
Posted September 15, 2012 - 06:13 AM
I ended up downloading a manual for $8 and all set, bike back together with the right torque and pattern.
If anyone needs to know, the main head bolts get fastened to 32 ft/lbs.....but tighten down in increments:
The 4 bolts get fastend as follows:
#1 stator side - rear
#2 clutch side - front
#3 stator side - front
#4 clutch side - rear