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EFV-8 Club Forum / 1940 Ford Discussion / cracked exhaust manifold

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Discussion Topic: cracked exhaust manifold

40fordor

12-19-2022 @ 10:14 AM

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Posts: 116
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I need to remove and replace the right side manifold. i am worried that a bolt may break off since it seems to be very tight. Are manifold bolts prone to break? If it breaks what is required to remove it? Will the engine require removal or maybe the fender? I already have an original replacement manifold.

Barney

12-19-2022 @ 3:55 PM

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Hi 40 fordor,

I'm guessing you're not lucky enough to have a stud scr*w*d into the head with a nut on the outside. It may help to attempt removing the bolt when the engine is warm. You may try to tighten the bolt very slightly, then loosen very slightly, tighten very slightly, etc. Patience, patience. It's a virtue, ya know.

Barney

ford38v8

12-19-2022 @ 3:58 PM

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Yep, they break. Heat it cherry red and let it cool. Wiggle it in-n-out gradually till you can take a good turn on it.

Alan

42oink

12-20-2022 @ 10:42 AM

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FWIW: WD40! or master blaster. Warm the engine and spray the bolts with wd-40. Go have a cool one. Next day , same routine. third day, give removal a try. If no luck, a couple more days of this and it should come loose. It might even come loose on day two, but the beer is awfully good. 42oink

37RAGTOPMAN

12-21-2022 @ 10:05 AM

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40fordor
BESURE to use a 6 point wrench or socket, so you do not round the bolt heads,
and use PLENTY KB BLASTER
also heat up the exhaust manifold by running to operating temp, and also use a good heat gun,
use work gloves to protect you hands,
and take your time,
I did this and had no problems, repalced all the bolts and nuts with stainless steel
hope this helps 37 Ragtopman
and make sure the manifold you are going to use is not warped, hold on a piece of glass or straight edge and use feeler gauge

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