rkc Posted July 27, 2006 Report Posted July 27, 2006 (edited) This past weekend I installed a used pro design cool head with new o-ring gaskets. I think I did everything proper but during warm ups & retorquing I developed a small leak evident at front left bolt.(above exhaust) My question is when installing longer head bolts I noticed the two longer bolts than the rest(above exhaust) did not bottom out untill threads disappeared(into cylinders without heads on).The other 8 bolts left the same 2 threads exposed just the same as all the stock head bolts.I was wondering if I should turn out front 2 bolt so 2 threads are exposed so o-rings can squish into threads the o-rings are still in good shape except around the bolts they're smashed and have to be replaced I also noticed o-rings around domes were different color (high temp?) can I use any old o-ring of right size? Any thoughts would be appeciated! Edited July 27, 2006 by rkc Quote
DRI4life Posted July 27, 2006 Report Posted July 27, 2006 dont reuse any orings after they have been torqued... i dont really understand your problem but just get a new set of orings, make sure all STUDS are fully torqued.. dont back any of them up two threads, or you will see a real leak lol.... and basicaly start over again.. here is a link that clearly explains how to install a cool head.. (a powerhead is the exact same thing but with a different name on top) clicky clicky Quote
GEEZR Posted July 27, 2006 Report Posted July 27, 2006 DRI4 is right, and make absolutely sure that the o-rings are not "on" the threads. Coolant will somehow find it's way up the studs and puddle up on top of your cool head , I've been there before. Also ,(as I've been told) the reason for the weird color of the o-rings on the domes is because they're a "silicone" based rubber for high temp. applications. Hope that helps somewhat. Quote
locogato11283 Posted July 27, 2006 Report Posted July 27, 2006 i would tighten it up more. 22 foot pounds right?? ive torqued to that before and had leaking. then i just went ahead and hand tightened it down some more and it stopped. thats happened on 2 different heads. if tightening isnt the problem you couldve pinched the o ring that goes around that stud. the depth that stud went down is not an issue... Quote
rkc Posted July 27, 2006 Author Report Posted July 27, 2006 (edited) Thank guys I'll pick up a new set (o-rings)by the weekend I'll go up to 22#s I also didn't put any grease on stud o-rings. Edited July 27, 2006 by rkc Quote
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