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09-11-2005, 10:53 PM
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Hummer Veteran
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Join Date: Nov 2003
Location: London, OH, United States
Posts: 62
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This past week I replaced my third manifold bolt. I have now busted 2 heads off the exhaust manifold on the drivers side. And one bolt on the passenger side. Both times its the bolt heads near the back of the motor, cabbin side. In both cases I have had to remove the header, clean the gasket, remove the bolt with vice grips and install new #10 grade bolts. After this the exhaust leak is fixed. I just wonder for how long or why it is happening in the first place?
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Dirts for racing and pavements for getting there!
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09-11-2005, 10:53 PM
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Hummer Veteran
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Join Date: Nov 2003
Location: London, OH, United States
Posts: 62
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This past week I replaced my third manifold bolt. I have now busted 2 heads off the exhaust manifold on the drivers side. And one bolt on the passenger side. Both times its the bolt heads near the back of the motor, cabbin side. In both cases I have had to remove the header, clean the gasket, remove the bolt with vice grips and install new #10 grade bolts. After this the exhaust leak is fixed. I just wonder for how long or why it is happening in the first place?
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Dirts for racing and pavements for getting there!
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09-12-2005, 03:35 AM
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Hummer Authority
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Join Date: Nov 2004
Location: Little Rock, Arkansas
Posts: 1,784
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raptor not likely the problem but, just for safety sake check your motor and tranny mounts. It is a slim chance that the engine is twisting enough to bind manifolds on something. Not likely but, just one thing you can look at.
TAZ
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05 H2 SUV cus. paint, Magnuson SC 6/12lb boost, cowl hood scoop, 12" dash touchscreen, GM elec. fans, HPTuners.com tuning soft., Dynatech headers dual catback exhaust Jet Hot chrome front to back Flowmaster Super 40's, Diamo 8 Karat rims & 325X60-20" Toyo, 4 OEM Captain seats Katzkins leather, rear console computer inside running all AV/NAV etc., Infinity component system 3 amps Tsunami Caps, rear flip down 12" monitor, headrest monitors, overhead console boost, fuel pressure, & A/F ratio gauges
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09-12-2005, 03:38 AM
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Hummer Messiah
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Join Date: Apr 2003
Location: Virginia Beach
Posts: 37,474
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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by HUMMERcustoms.com/TAZ:
raptor not likely the problem but, just for safety sake check your motor and tranny mounts. It is a slim chance that the engine is twisting enough to bind manifolds on something. Not likely but, just one thing you can look at.
TAZ </div></BLOCKQUOTE>There's not much else that could cause that problem. Unless the manifold bolts are being over torqued (yes, that may lead to stripping the heads..).
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