Overtighten bolt

[Fantom_X7]

I'm not sure what to do now. I was bolting on lower gt40 when i heard a thump. I checked torque wrench and it moved to 40lbs. :BangHead: The heads are ported& polished C5AE-B 289 with oversized valves and dual coil springs. I just got them out of the shop for a valve job and resurface and now I have this. :crybaby2: Buying a new set of heads is ABSOLUTELY out of the question. My funds are past due exhausted.

 

[Win]

That's off the Lower Intake manifold right ??

You might have to grind that down and add some washers to get it so it will sit snug.

 

[Fantom_X7]

That's off the Lower Intake manifold right ??

You might have to grind that down and add some washers to get it so it will sit snug.

No it's off of the Cylinder head.

 

[Paul]

Are there enough threads to still bolt the intake down? Otherwise, you'll have to have the head welded and repaired.

Always make sure to lock your torque wrench into place before messing with it. People over-tighten the crap out of stuff all the time.

 

[Fantom_X7]

Are there enough threads to still bolt the intake down? Otherwise, you'll have to have the head welded and repaired.

Always make sure to lock your torque wrench into place before messing with it. People over-tighten the crap out of stuff all the time.

No it'll just spin freely. Just got done testing that and I SNAPPED ANOTHER ONE!!!!!!!

 

[Fantom_X7]

WHY WHY WHY :angry4:

 

[MustangChris]

This thread is like:

 

[MustangChris]

i know i got quoted $20.00 to weld an ear back onto my teskid block... so, at least youre not looking at too big of a problem.

sorry to hear your troubles. i think youll have to remove and repair.

 

[ivan12]

Can you find someone that does mobile welding? If you take the heads off to get repaired, who knows how long it'll take for them to do it, plus the money you'll spend on gaskets. Just an idea

 

[CC'S95GT]

how long are the bolts you are using?
It looks like the bolts are not reaching the bottom of the hole and you only have 2 or 3 threads gripping the head
Are you confusing ft.lbs and in.lbs?
As a last resort if the threads are stripped you might be able to step up to the next size bolt and retap the threads.
I hate when things like that happen

 

[MustangChris]

how long are the bolts you are using?
It looks like the bolts are not reaching the bottom of the hole and you only have 2 or 3 threads gripping the head
Are you confusing ft.lbs and in.lbs?
As a last resort if the threads are stripped you might be able to step up to the next size bolt and retap the threads.
I hate when things like that happen

perhaps a helicoil.

 

[CC'S95GT]

how long are the bolts you are using?
It looks like the bolts are not reaching the bottom of the hole and you only have 2 or 3 threads gripping the head
Are you confusing ft.lbs and in.lbs?
As a last resort if the threads are stripped you might be able to step up to the next size bolt and retap the threads.
I hate when things like that happen

perhaps a helicoil.

I brain farted on that.
The tab still needes to be drilled and rethreaded for the heli coil. If there is enough of the tab left.

 

[MustangChris]

how long are the bolts you are using?
It looks like the bolts are not reaching the bottom of the hole and you only have 2 or 3 threads gripping the head
Are you confusing ft.lbs and in.lbs?
As a last resort if the threads are stripped you might be able to step up to the next size bolt and retap the threads.
I hate when things like that happen

perhaps a helicoil.

I brain farted on that.
The tab still needes to be drilled and rethreaded for the heli coil. If there is enough of the tab left.

true. but after he welds it, the threads will be toast anyways, so helicoil.

 

[Fantom_X7]

how long are the bolts you are using?
It looks like the bolts are not reaching the bottom of the hole and you only have 2 or 3 threads gripping the head
Are you confusing ft.lbs and in.lbs?
As a last resort if the threads are stripped you might be able to step up to the next size bolt and retap the threads.
I hate when things like that happen

The bolts are OEM flanged ones, nothing store purchased.

 

[CC'S95GT]

that's not what I was saying.
It just doesn't look like bolts are going all the way through the tab.
ie: the tab has 7 threads but the bolts are only gripping 3 of them.

 

[Fantom_X7]

that's not what I was saying.
It just doesn't look like bolts are going all the way through the tab.
ie: the tab has 7 threads but the bolts are only gripping 3 of them.

I'm having somebody come and see if they can weld it. After reading what you said, I guess longer bolts should do the trick. Hopefully after it's welded, i can have him re-thread the wholes because im sure it wont line up the way it did before.

 

[Paul]

You don't need longer bolts once it's repaired, just don't overtighten stuff anymore.

 

[Fantom_X7]

You don't need longer bolts once it's repaired, just don't overtighten stuff anymore.

I'll keep that in mind next time i decide to rebuild a 302 or any motor for that matter. I'll post after heads are done.

 

[modo]

to fix that right the head has to come off. make sure you clean anything that is laying in the lifter valley so it doesnt fall down into the crankcase