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Old 06-18-2016, 03:17 PM   #26
Curbdog17
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Re: GM LS Broken Exhaust Manifold Bolt Fix (step by step with pics)"

Thanks for the tip. You just helped me out a ton.
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Old 06-18-2016, 08:53 PM   #27
GASoline71
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Re: GM LS Broken Exhaust Manifold Bolt Fix (step by step with pics)"

Sweet! Glad it was of some help!

Gary
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My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread.

The Rebuild of Creeping Death after the wreck

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I would never rebuild a 305.
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I love using vacuum gauges as part of the carb tuning process. I hook the gauge to the inside of my garbage can and leave it there.
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Remember Murphys 2nd law of mechanical relationships... "OPPOSING COMPONENTS ATTEMPTING TO OCCUPY THE SAME SPACE, AT THE SAME TIME, GENERALLY END UP OCCUPYING ADJOINING SPACE AT THE BOTTOM OF THE OIL PAN"
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Old 12-28-2016, 12:52 PM   #28
binford
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Re: GM LS Broken Exhaust Manifold Bolt Fix (step by step with pics)"

Looks like I get to replace the last two bolts on my 6.0

I've done the welding thing before on axle studs that have broken on 4x4's.
I used an arc welder with a 312 stainless rod, which is similar to missile rod. with a 115,000 psi tensile strength so it wont twist off. It's a fast freeze rod, so you can weld a bit at a time and stack the weld like stacking dimes.
once I have created a new stud to attach a nut to, I switch to a regular 7018 rod.

Taping the washer in place is an awesome idea as it protects the aluminum head from the heat of the weld.
My local welding shop does not carry 312 in mig wire.

I better practice up welding on some 3/8 bolts before going live on my motor
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Old 10-06-2018, 07:55 AM   #29
richards72chevy
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Re: GM LS Broken Exhaust Manifold Bolt Fix (step by step with pics)"

Great write up.I may have missed it some where in the read but shouldn't an old spark plug be put in there and exhaust port covered up to prevent bb's from going in there?
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Old 10-06-2018, 12:15 PM   #30
Macdaddy1
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Re: GM LS Broken Exhaust Manifold Bolt Fix (step by step with pics)"

My 5.3 had 4 exhaust bolts that broke off. I drilled and extracted three of them and the 4th I had to use a helicoil. Next time I am using the welder.
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