Leaky radiator fluid.


4 replies to this topic
  • iceee187

Posted December 06, 2011 - 05:41 PM

#1

2006 yz 450 high comp piston, full exhaust, non oem top end gaskets.
Ofter a rebuild I have fluid coming out of the front cyclinder head flange. leaking a drop a second. very notciable. Everything is in spec of tightness. could my head gasket be blown some how. Its a tuck offraod gasket. ask and I can give u more details.

  • grayracer513

Posted December 06, 2011 - 07:40 PM

#2

Check for a coolant leak at the joint between the head and the tube where radiator hose connects to the top end.

How did you do your cylinder head torque?

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  • iceee187

Posted December 07, 2011 - 02:42 AM

#3

there is no leakage from the head gasket anwhere, it seems to still be coming from the front flange. Just put a OEM oring in the front top head cylinder head rad intake flange.
I did a 22 ft lb then a 180 degree turn on the bolts???

  • iceee187

Posted December 07, 2011 - 02:43 AM

#4

its a 14.1 comp piston???

  • grayracer513

Posted December 07, 2011 - 08:06 AM

#5

I did a 22 ft lb then a 180 degree turn on the bolts???

That would be overtightened. You're supposed to pretorque to 22 ft/lb, then loosen the bolt and retorque to 14 ft/lb, THEN turn each bolt another 180 in 90 degree steps.

Read:

http://www.thumperta...ad.php?t=972816

As far as the leak, if it persists from the outlet tube, inspect the socket the tube sits in as well as the tube and the O-ring for damage.





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