Cylinder Head Bolts - JeepForum.com
 
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post #1 of 9 Old 06-24-2010, 06:33 PM Thread Starter
AlexTJ
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Cylinder Head Bolts

I'm rebuilding my 4.7L stroker and I've run into a bit of a problem:

My machinist messed up.

He had to sleeve three head bolt holes on the block because of cracks and he installed 7/16 inserts instead of 1/2 inserts.

Soooo I need to find three head bolts that will work. All three bolts are the longer ones that are on the outside of the valve cover over the intake/exhaust.

Do I have to find a special head bolt? Are the bolts real TTY? Is there a difference in TTY bolts?


'04 TJ RME
RIP '97 TJ Sport:4.7L STROKER:HpDana30 & Ford8.8 4.11:RE4.5"SF:33s
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post #2 of 9 Old 06-24-2010, 09:08 PM
white89YJ
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If it were me I would make my machinist give me the right bolts so the warranty would not be affected.
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post #3 of 9 Old 06-25-2010, 01:39 AM Thread Starter
AlexTJ
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Warranty on what?

'04 TJ RME
RIP '97 TJ Sport:4.7L STROKER:HpDana30 & Ford8.8 4.11:RE4.5"SF:33s
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post #4 of 9 Old 06-25-2010, 05:31 AM
5-90
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Quote:
Originally Posted by AlexTJ View Post
I'm rebuilding my 4.7L stroker and I've run into a bit of a problem:

My machinist messed up.

He had to sleeve three head bolt holes on the block because of cracks and he installed 7/16 inserts instead of 1/2 inserts.

Soooo I need to find three head bolts that will work. All three bolts are the longer ones that are on the outside of the valve cover over the intake/exhaust.

Do I have to find a special head bolt? Are the bolts real TTY? Is there a difference in TTY bolts?
I take it the original screw holes are D&T 1/2"-13? Unless they're going to be re-threaded to 7/16"-14 (which would require a bushing to do so properly,) you're not going to find something that works. Have the machinist knock out the bushings he put in and put in 1/2" bushings as he should have done - and it's his mistake, so there's no point in you paying for it! Period.

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post #5 of 9 Old 07-18-2010, 04:28 PM Thread Starter
AlexTJ
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Quote:
Originally Posted by 5-90 View Post
I take it the original screw holes are D&T 1/2"-13? Unless they're going to be re-threaded to 7/16"-14 (which would require a bushing to do so properly,) you're not going to find something that works. Have the machinist knock out the bushings he put in and put in 1/2" bushings as he should have done - and it's his mistake, so there's no point in you paying for it! Period.
He ended up getting me good, ARP bolts that fit the incorrect bushings he installed. I don't really think it was possible to knock them out the way they were installed (i.e. uber permanent). Engine is assembled anyway so its all good now unless those bolts aren't strong enough. I could only torqure them to about 85 foot pounds responcibly while the others are at 110

'04 TJ RME
RIP '97 TJ Sport:4.7L STROKER:HpDana30 & Ford8.8 4.11:RE4.5"SF:33s
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post #6 of 9 Old 07-20-2010, 03:49 PM
haro504
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i dont know for sure but i would worry about the different torques might worp the head or create a weak area in the head gasket but i dont know for sure. i myself dont like it and would want it done right you probally dident pay him to get it close did he atleast give you some of your money back
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post #7 of 9 Old 07-21-2010, 12:34 AM
ClimbStuff
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Yikes! You should never use different size bolts UNLESS they are extra bolts that are added... but I've only seen that on 4 bangers.
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post #8 of 9 Old 07-28-2010, 02:40 AM Thread Starter
AlexTJ
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Finally started the new stroker up and it leaked coolant between the head and the block right under those three 7/16 head bolts...

Then it blew the head gasket right after the cam break in... We towed it to my machinists shop and I gave him a silent stare 'til he said "alright!"

'04 TJ RME
RIP '97 TJ Sport:4.7L STROKER:HpDana30 & Ford8.8 4.11:RE4.5"SF:33s
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post #9 of 9 Old 07-29-2010, 03:10 PM
haro504
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sorry to hear about that thats alot of work and money to have to redo it what ever happened to taking pride in your work and doing the best you can. he should have known the different torques on head bolts were asking for trouble and corrected it then have him check the head to see if its worped. its probally fine but you dont want to put it back on and find out later
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