416 head studs?

[Joecool1264]

Should a 10:1 J&E 416 be pulling the head studs out / blowing head gaskets? I'm on my second head gasket. First one was a fiber/metal, this one is a cometric with three thin sheets of metal. I torqued to 25 & then 35 in a crossbolt patten. Everthing was clean dry and flat too. It feels like they are torquing down, I know someone out there knows whats going on or has had this problem.

[Honda#4]

With that comp they should'nt pull out but maybe the studs were bad to begin with

[zrpilot]

It has been my experience that 400EX head studs will pull the threads loose in the cylinder anytime that the cylinder gets too hot breaking down the aluminum. Pre-detonation could be one cause of this. I have heard that getting the head too hot during re-sleeve can also cause this. Lastly over-torqueing the head studs, obvious.

[Ruby Soho]

mic the studs and see if there in spec

[TRXRacer1]

Originally posted by Honda#4
With that comp they should'nt pull out but maybe the studs were bad to begin with It's extremely rare to have a bad stud, it's the aluminum they sit in. The stock studs can take just about all the abuse you can toss at them if you plant them properly.

[Honda#4]

Ur right TRXracer1 I forgot about that, but anyhow It's time to Helicoil them now

[Joecool1264]

Well I put it back together, well see. Thanks for the info. I'll do heli-coils and HD studs if they go again.

[zrpilot]

Originally posted by Joecool1264
Well I put it back together, well see. Thanks for the info. I'll do heli-coils and HD studs if they go again.

FYI, if you drill them for Heli-coils, you can't install HD studs.

[TRXRacer1]

Originally posted by Joecool1264
Well I put it back together, well see. Thanks for the info. I'll do heli-coils and HD studs if they go again. You only need one or the other. Heli-coils and stock studs should be plenty.

[Joecool1264]

Stock if I can. Which is better?