 |
|
08-10-2010, 09:10 PM
|
|
Hummer Veteran
|
|
Join Date: Jul 2003
Posts: 44
|
|
Re: Exhaust manifold bolt breaking?
There was a Technical service bulletin on this. They changed the bolt spec because of this problem. The new bolts have a larger head .
|
08-10-2010, 09:30 PM
|
 |
Hummer Professional
|
|
Join Date: Nov 2008
Posts: 261
|
|
Re: Exhaust manifold bolt breaking?
Do you know when they made this change? Just wondering if this is something I should be watching on my 2005.
__________________
2005 H2 SUV - Stealth Gray with Ebony interior - Third row - Exterior tire carrier -
Mirror caps - black bedliner
Roof rack rails - black bedliner
Wheels - Black bedliner on stock wheels
Gas cap lid - still chrome but will soon be black bedliner
Tail light guards - still chrome but will be black bedliner
Grill - Still chrome but will be black bedliner
Hmmmm, is there a pattern developing here?
|
08-10-2010, 09:57 PM
|
|
Hummer Veteran
|
|
Join Date: Jul 2003
Posts: 44
|
|
Re: Exhaust manifold bolt breaking?
I dont have the bulliten anymore, maybe somebody else does.
Look at the heads on your bolts, then go to the dealer and look at the heads on the replacement bolts. If the new bolts have larger heads then whats on your h2, you need to change them.
|
08-13-2010, 01:24 AM
|
|
Elcova Rookie
|
|
Join Date: Feb 2009
Posts: 6
|
|
Re: Exhaust manifold bolt breaking?
I had 2 broken on the right side and 2 broken on the left. The left rear was broken below the surface and it took me a few hours to drill it out and extract it. The other 3 had exposed studs that i ground 2 flats on and used a wrench to get them out. Screw the cheap GM bolts! I installed a set of hardened studs that will never break!
After all of that was done I installed a set of OBX Stainless Long Tubes, stainless high flow cats and stainless all the way out the back. Sounds great, pulls hard and i couldn't be happier!!!
Later,
AO
|
08-29-2010, 10:55 PM
|
 |
Hummer Professional
|
|
Join Date: Sep 2008
Location: Utah
Posts: 293
|
|
Re: Exhaust manifold bolt breaking?
Been there, done this on my ride not too long ago. After breaking several types of bits on trying to drill it out and tap it out, had to pull it and have the bolt melted out and had the hole rethreaded by a fabrication machinist. This one really pissed me off, pretty dissappointed in GM for this one... 
__________________
Sweet looking H2 with not enough mods (2003 Pewter H2, 20" Rockstars, 40"x15.5" Toyo MT's, E&G Extended Flares, Full body tube steel exoskeleton, 5" Skyjacker lift, Amp Research steps, Gobi Roofrack and ladders, Smoked LED's, AFe CAI, Dynatech long tubes and cats, Magnaflow exhaust, Stock tune, 4.88 gears, Chrome Grenade Shifter, interior blacked out, rear captains chairs, Solar Power!!)
|
08-30-2010, 04:27 AM
|
|
Hummer Veteran
|
|
Join Date: Jan 2010
Posts: 48
|
|
Re: Exhaust manifold bolt breaking?
Quote:
|
Originally Posted by Agentorange
I had 2 broken on the right side and 2 broken on the left. The left rear was broken below the surface and it took me a few hours to drill it out and extract it. The other 3 had exposed studs that i ground 2 flats on and used a wrench to get them out. Screw the cheap GM bolts! I installed a set of hardened studs that will never break!
After all of that was done I installed a set of OBX Stainless Long Tubes, stainless high flow cats and stainless all the way out the back. Sounds great, pulls hard and i couldn't be happier!!!
Later,
AO
|
How long have you had those headers on now? I think you can buy those on Ebay right?
Thanks |
09-28-2010, 07:05 AM
|
|
Elcova Rookie
|
|
Join Date: Feb 2009
Posts: 6
|
|
Re: Exhaust manifold bolt breaking?
Quote:
|
Originally Posted by tcalz06
How long have you had those headers on now? I think you can buy those on Ebay right?
Thanks
|
Been on for 1-1/2 months now and all is well. Yes got them on Ebay.
AO |
10-18-2012, 01:56 PM
|
 |
Hummer Veteran
|
|
Join Date: Apr 2012
Location: boston,ma
Posts: 130
|
|
Re: Exhaust manifold bolt breaking?
Any suggestions on what's the best replacement for the bolts?
|
| Thread Tools |
Search this Thread |
|
|
|
| Display Modes |
 Hybrid Mode
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
All times are GMT +1. The time now is 10:29 AM.
|
