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 Exhaust manifold bolt removal tips
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CRM318
Tribal Scout

USA
30 Posts

Posted - 30 Jan 2014 :  09:55:55 AM  Show Profile  Reply with Quote
This weekend, Im attempting to install a new set of headers and I was wondering if anyone had any good tips on removing old bolts. The one that are in there look very old and pitted and look difficult to remove.

1970 Pontiac GTO, Atoll Blue, 400, TH400, 3.73 Safe T Track

cortcomp
Coyote

USA
5338 Posts

Posted - 30 Jan 2014 :  10:50:38 AM  Show Profile  Visit cortcomp's Homepage  Reply with Quote
Make sure to use 6 point socket instead of 12 point. I have learned more than once that 12 point can bite you in the a$$ on stubborn bolts.
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Bill Boyle
Horse Feathers (Charter Member)

USA
4797 Posts

Posted - 30 Jan 2014 :  11:06:46 AM  Show Profile  Visit Bill Boyle's Homepage  Reply with Quote
You'll need to spray some CRC or STP or other brand name rust penetrant on those bolts to loosen them. Give it a while to work, respray as necessary before you try to back them out.

Do use a breaker bar or longer handled ratchet; Don't use a hammer to help the breaker bar get started.

"Dedicated to keeping the classic Pontiac engine alive."

----
400 bored +.030, forged TRW pistons, ported 62 heads, Hedman headers, 2.5 SS dual exhaust X Pypes, Comp 276AH10 cam, Scorpion 1.65 RR, 850 Q-jet, stock intake & tuned HEI; original owner.
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Blued and Painted
Chief PONTIAC

USA
3409 Posts

Posted - 30 Jan 2014 :  12:00:57 PM  Show Profile  Reply with Quote
I like PB blaster or WD40. If the bolt heads are severely eroded, a 14mm 6 point socket will fit snug. The down pipe studs and nuts get more weathering. I have better luck with a 1/2" Impact wrench and a heavy duty extension braking them loose rather than a breaker bar.

To install headers you will probably have to remove the oil filter housing, starter, fan shroud, and of course the engine mount thru bolts. Loosen the trans mount bolts to prevent damage.

Good Luck!


Bull Nose Formula/ 461/ Q-Jet/
TH400/ 3.08 8.5 / R44TS.
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CRM318
Tribal Scout

USA
30 Posts

Posted - 30 Jan 2014 :  2:32:13 PM  Show Profile  Reply with Quote
Thanks guys! Ill give it a shot.

1970 Pontiac GTO, Atoll Blue, 400, TH400, 3.73 Safe T Track
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bnorris_74
Crazy Horse

USA
1442 Posts

Posted - 06 Jul 2014 :  07:15:12 AM  Show Profile  Reply with Quote
TTT
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