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Old 07-06-2005, 11:21 PM   #1 (permalink)
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any tips for removing a stubborn, stripped exhaust manifold bolt

I am trying to remove the exhaust manifold off of my 352. One side has never been removed in 40+ years. I got 3 of the 5 off and stripped the other 2 with my air gun. I heated up both bolts with map gas and got one off. The other one won't budge and I have stripped the heck out of it and keep heating it up and try removing with pipe wrench, vice grips, plyers, but no luck.

Any other ideas? I have seen guys weld something to it, to remove, but I am not a welder.

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[ This Message was edited by: fakesnake on 7/7/05 11:21am ]

[ This Message was edited by: fakesnake on 7/7/05 11:22am ]
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Old 07-06-2005, 11:47 PM   #2 (permalink)
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any tips for removing a stubborn, stripped exhaust manifold bolt

do you need the manifold, if u dont just take a grinder to it and take the head off. or get a smaller size socket that you dont need anymore and force it on then try removing it again
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Old 07-06-2005, 11:51 PM   #3 (permalink)
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any tips for removing a stubborn, stripped exhaust manifold bolt

what they do is weld on a NUT to the head of the bolt maybe a bigger one and they get on that to get it off
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Old 07-07-2005, 12:11 AM   #4 (permalink)
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any tips for removing a stubborn, stripped exhaust manifold bolt

hit it on the end like a nail. The shock will usually help jar the threads free. After that, get it hot, and hit it with a good rust breaking penetrating oil. Most the guys I know swear by Kroil.

Hit it again for good measure.

WElding a nut on the end is a good idea if its an option, as it gives you a fresh biting surface. IF ya cant, do the above, lock some vice grips on it, and it should go.

If all else fails, call a weld shop, they are experts.
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Old 07-07-2005, 12:12 AM   #5 (permalink)
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any tips for removing a stubborn, stripped exhaust manifold bolt

I am selling my old engine and need the manifold for my other engine.

I was thinking maybe I should file the sides of bolt head and see if I could get a smaller socket on. It is basically a round bolt head now.


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[ This Message was edited by: fakesnake on 7/7/05 12:12pm ]
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Old 07-07-2005, 07:12 AM   #6 (permalink)
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any tips for removing a stubborn, stripped exhaust manifold bolt

If the engine is out: Just grind the head off the bolt, remove the manifold, and you will have more bolt to work with. Since you are not a welder; then you can try a pipe wrench. If this does not work: grind the bolt flush with the head, center punch it, drill it and use an eze-out to remove it.

As stated above; a sharp blow with a hammer, Aero-Kroil, and heat helps.
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Old 07-07-2005, 07:43 AM   #7 (permalink)
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any tips for removing a stubborn, stripped exhaust manifold bolt

cut the head off ,then slide the manifold off over the remaining bolt, than ,after the rest of the bolt,is exposed, heat the bolt cherry red,which will enlarge ,the bolt, let it cool till its ,able to touch, and like other guy said ,hit it straight like a nail, than with your pipe wrench ,twist it out, KROIL penitrating oil soked overnight won't hurt. hope it works,as used to for me bill
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Old 07-07-2005, 10:33 AM   #8 (permalink)
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any tips for removing a stubborn, stripped exhaust manifold bolt

SEARS sell a great tool that removes stripped nuts and bolts...it looksl ike a socket, threads itself on an is tapered on the inside, they work really nice. Come in alot of diffrent sizes. Get the small kit its like 19.99 comes with 5 different sizes.
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Old 07-07-2005, 09:17 PM   #9 (permalink)
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any tips for removing a stubborn, stripped exhaust manifold bolt

Yep! Love the craftsman stripped bolt removers. They look like a rounded hex socket that has been twisted. Work wonders, because the tighter you pull, the more the little things bite.
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Old 07-08-2005, 12:06 AM   #10 (permalink)
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any tips for removing a stubborn, stripped exhaust manifold bolt

Fakesnake, if you dont get the manifold off, let me know. I have my old exhaust manifolds you can have. They are off of a 1970 390.


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Old 07-08-2005, 07:56 AM   #11 (permalink)
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any tips for removing a stubborn, stripped exhaust manifold bolt

After fighting with the old bolts on my 460 (I tried everything mentioned above), I vote for cut it off, drill it our and out in a thread insert.
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Old 07-08-2005, 09:51 AM   #12 (permalink)
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any tips for removing a stubborn, stripped exhaust manifold bolt

I usually start applying penetrating oil a few days before removing the bolt... some in the morning before heading off to work and some at night.

Once I started doing that, most of my problems went away!
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Old 07-08-2005, 11:51 AM   #13 (permalink)
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any tips for removing a stubborn, stripped exhaust manifold bolt

Yeah, the Craftsman stripped-bolt remover kit is one of the best purchases I've ever made. It works great.

Gary
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Old 07-08-2005, 01:37 PM   #14 (permalink)
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any tips for removing a stubborn, stripped exhaust manifold bolt

Good Day
First thing I want to know, is which one it is? If it's one of the top ones, then heating the cylinder head up at the thread area of the bolt,usually does the trick. You might need to heat the manifold were the bolt passes through, they do rust in. BUT if it's the lower ones, that's a different story.
I would heat the bolt head, cherry red, and the side of the manifold towards the cylinder head and see if the heat will transfer to the threads in the head. DON'T try and remove the bolt though while it's still red, let it cool just a minute and try it. It may take several tries. Yes to the use of the Craftman Stripped Bolt Removers!
Good Luck, I Know, I've been Here, Ray
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Old 07-08-2005, 04:18 PM   #15 (permalink)
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any tips for removing a stubborn, stripped exhaust manifold bolt

Put me down as a fan of the Craftsman rounded bolt remover too. Those jewels are worth their weight in gold.

I have only had to drill out one manifold bolt after numerous jobs...and that was on one of the 3 1988 Turbo Coupe T-birds I've had...and I'm certain that was due to an improper grade of bolt being installed along the way.

Penetraint in advance....a little heat....and the Craftsman Kit is a sure fired winner.
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