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  #1  
Old February 13th, 2021, 19:14
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IslanderOffRoad IslanderOffRoad is offline
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Rocker bolt- hole stripped?

Iím in the middle of a tupy swap on my 01 xj. Head is a rebuilt from Windy City cylinder heads

Finally got the head on and torqued down today, then started installing the pushrods and rockers

Had an issue with one of the bolts for the rockers. Followed the fsm procedure of alternating back and forth to avoid bending the bridge, and one went from righty tighty to righty loosey

Pulled it back apart and a bunch of threads came out with the bolt. Didnít appear or feel like it had cross threaded.

Reached out to Windy City and they said:

Sorry you have an issue. Iím not sure why, we do retap all the bolt holes.
The only thing I can suggest would be to install a helicoil in that hole.

Anyone here has a similar issue? How did you resolve it. I really donít want to pull the head again if I donít have to.
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  #2  
Old February 13th, 2021, 20:01
RCP Phx RCP Phx is offline
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Re: Rocker bolt- hole stripped?

A Heli-coil is about your only solution besides not torqueing the bolts down under a load. You should be "indexing" the cam for each stud.
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  #3  
Old February 13th, 2021, 20:38
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IslanderOffRoad IslanderOffRoad is offline
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Re: Rocker bolt- hole stripped?

Quote:
Originally Posted by RCP Phx View Post
A Heli-coil is about your only solution besides not torqueing the bolts down under a load. You should be "indexing" the cam for each stud.
I followed the procedure in the fsm. No mention of indexing the cam...
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  #4  
Old February 13th, 2021, 22:52
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Re: Rocker bolt- hole stripped?

Before drilling it out I suppose I should see if it makes a difference if I rotate it to tdc since this is cylinder 1. Wonder if it would bite at that point
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  #5  
Old February 14th, 2021, 05:42
RCP Phx RCP Phx is offline
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Re: Rocker bolt- hole stripped?

Quote:
Originally Posted by IslanderOffRoad View Post
I followed the procedure in the fsm. No mention of indexing the cam...
I think that it comes under the category of general common knowledge.

Quote:
Originally Posted by IslanderOffRoad View Post
Before drilling it out I suppose I should see if it makes a difference if I rotate it to tdc since this is cylinder 1. Wonder if it would bite at that point
That's pretty risky.

That's why I changed to studs at my earliest convenience.
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Old February 14th, 2021, 07:01
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Re: Rocker bolt- hole stripped?

Install at least one Heli-Coil and consider doing them all. The aluminum and magnesium military parts we make at work all get Heli-Coils as specified on the blueprint.
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Go ahead and slam the liftgate down on a blanket, and see how long you are laughing.
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  #7  
Old February 14th, 2021, 07:46
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Re: Rocker bolt- hole stripped?

Quote:
Originally Posted by RCP Phx View Post
I think that it comes under the category of general common knowledge.
Gonna disagree with you there but now I know for once I make the repair
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Last edited by IslanderOffRoad; February 14th, 2021 at 08:23.
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Old February 14th, 2021, 07:47
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Re: Rocker bolt- hole stripped?

Quote:
Originally Posted by Tim_MN View Post
Install at least one Heli-Coil and consider doing them all. The aluminum and magnesium military parts we make at work all get Heli-Coils as specified on the blueprint.
Any particular reason for doing them all? Had 0 issues on the other cylinders
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Old February 14th, 2021, 09:34
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Re: Rocker bolt- hole stripped?

How do you know for sure that they didn't mess up any of the other threads ?
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Quote:
Originally Posted by bimmerjeeper


Go ahead and slam the liftgate down on a blanket, and see how long you are laughing.
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  #10  
Old February 14th, 2021, 10:13
Black1990jeep Black1990jeep is offline
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Re: Rocker bolt- hole stripped?

Timeserts are my preferred thread repair method over helicoil.

http://www.timesert.com/

good luck
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  #11  
Old February 14th, 2021, 10:22
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IslanderOffRoad IslanderOffRoad is offline
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Re: Rocker bolt- hole stripped?

Quote:
Originally Posted by Tim_MN View Post
How do you know for sure that they didn't mess up any of the other threads ?
Because they installed with no issue
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  #12  
Old February 14th, 2021, 10:23
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IslanderOffRoad IslanderOffRoad is offline
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Re: Rocker bolt- hole stripped?

Quote:
Originally Posted by Black1990jeep View Post
Timeserts are my preferred thread repair method over helicoil.

http://www.timesert.com/

good luck
I was looking at those but Iím not sure thereís enough of a shoulder on the tower to counter sink
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  #13  
Old February 14th, 2021, 11:09
RCP Phx RCP Phx is offline
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Re: Rocker bolt- hole stripped?

Case savers or time-certs work great in aluminum, but heli-coils work great in cast iron/steel.
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  #14  
Old Yesterday, 21:59
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Re: Rocker bolt- hole stripped?

Got it all together. Helicoil worked and was pretty easy to accomplish. Jeep idles and runs great
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