Heli-Coil Stripped Cam Caps Question

[iNoise]

So im in the process of repairing about 8 cam cap stripped threads in my cylinder head with heli-coils. Not sure how so many got stripped, last time these bolts were touched was 8+ years ago when I installed new cams. Is it possible for the bigger cams to put enough stress on the bolts to cause them to strip?

I guess my question is, should I just go ahead and heli-coil all the bolt holes to be safe or just repair the stripped ones?

Any input is much appreciated.

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[silvreclips]

I would only repair the stripped holes. You must have over torqued them to strip out the threads

 

[Boomdeeze]

I would only repair the stripped holes. You must have over torqued them to strip out the threads

Agreed

 

[motomattx]

They likely pulled the threads out when you removed the bolts.

 

[Goldenugget]

I would just repair the damaged ones. Look into a machine shop doing the repairs so they can get everything located properly. The last thing you want is one of those holes a little off. It may be cheaper than you think.

 

[iNoise]

They likely pulled the threads out when you removed the bolts.

Thats what im thinking, engine sat for 4 years without starting before I broke it down for rebuild.

 

[AWD-Tony]

+1 just the damaged one. Little oil on the bolts when installing, proper torque spec and torque pattern .

 

[Mello]

Gee, I would do them all. It's hard to say if all the threads may or may not be compromised.

 

[ThunderChild]

I would just repair the damaged ones. Look into a machine shop doing the repairs so they can get everything located properly. The last thing you want is one of those holes a little off. It may be cheaper than you think.

This. Had a bunch of studs snap off in a set of Ford modular heads and a couple pull the threads, cost about 50 bux to have them all fixed, and they cleaned the heads for us too.