Broken manifold bolts....Need help.... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

StormRider · 02-07-2007, 05:29 PM

i am trying to pull my exhaust manifold off of the 350 and got 2 broken bolts.
i tried to spray a ton of WD 40 beforehand and also tried to heat them up but no help....they broke anyways. I went to sears and bought those drill out extractors but they are not working that great. i guess because they're just too tight on the head or something. i feel like the extractor might break if i give it one more turn. also thought about taking the head off with the manifold on but there are 2 bolts behind the middle of the exhaust manifold that don't have enough clearance to come out. anyone got some much needed ideas or suggestions is greatly appreciated.

PanelDeland · 02-07-2007, 05:37 PM

Are the bolts broken off below the bolt head? If so you may be able to pry gently the manifold away from the head.Then a small pipe wrench will fit on the bolt shaft.Heat the bolt and spray WD or a better product(PB Blaster is one) on it you may have some luck rocking the bolt slightly.Tighten just enough to put pressure on it then loosen the same way.This may loosen the rust enough to let the penetrant work it's way into the threads.

bryanw1968 · 02-07-2007, 05:40 PM

Quote:

Originally Posted by PanelDeland

Are the bolts broken off below the bolt head? If so you may be able to pry gently the manifold away from the head.Then a small pipe wrench will fit on the bolt shaft.Heat the bolt and spray WD or a better product(PB Blaster is one) on it you may have some luck rocking the bolt slightly.Tighten just enough to put pressure on it then loosen the same way.This may loosen the rust enough to let the penetrant work it's way into the threads.

Good idea.

corn · 02-07-2007, 07:14 PM

Once you get the manifold off, I bet the bolts will come right out. Ill bet the manifold is warped & holding the bolts...

StormRider · 02-07-2007, 09:08 PM

Thanks PanelDeland I'll try to do that or try and figure something out. I've taken a long enough break from it already...ready to tackle it again....LOL

02-07-2007, 05:29 PM	#1
StormRider Junior Member Join Date: Jan 2007 Location: Charlotte, NC Posts: 243	Broken manifold bolts....Need help.... i am trying to pull my exhaust manifold off of the 350 and got 2 broken bolts. i tried to spray a ton of WD 40 beforehand and also tried to heat them up but no help....they broke anyways. I went to sears and bought those drill out extractors but they are not working that great. i guess because they're just too tight on the head or something. i feel like the extractor might break if i give it one more turn. also thought about taking the head off with the manifold on but there are 2 bolts behind the middle of the exhaust manifold that don't have enough clearance to come out. anyone got some much needed ideas or suggestions is greatly appreciated.

02-07-2007, 05:37 PM	#2
PanelDeland I am a Referee of life. Join Date: Jun 2000 Location: Greensboro N.C. Posts: 13,993	Re: Broken manifold bolts....Need help.... Are the bolts broken off below the bolt head? If so you may be able to pry gently the manifold away from the head.Then a small pipe wrench will fit on the bolt shaft.Heat the bolt and spray WD or a better product(PB Blaster is one) on it you may have some luck rocking the bolt slightly.Tighten just enough to put pressure on it then loosen the same way.This may loosen the rust enough to let the penetrant work it's way into the threads. __________________ The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil"

02-07-2007, 07:14 PM	#4
corn Registered User Join Date: Dec 2003 Location: here Posts: 5,789	Re: Broken manifold bolts....Need help.... Once you get the manifold off, I bet the bolts will come right out. Ill bet the manifold is warped & holding the bolts...

02-07-2007, 09:08 PM	#5
StormRider Junior Member Join Date: Jan 2007 Location: Charlotte, NC Posts: 243	Re: Broken manifold bolts....Need help.... Thanks PanelDeland I'll try to do that or try and figure something out. I've taken a long enough break from it already...ready to tackle it again....LOL __________________ 68 LongStep 350/ 3 Spd (ongoing project) 04 Suburban Z71 (daily driver) 97 C5 Corvette ( sold when 2nd baby came) 90 454SS pick up (sold) 1970 Chevelle Malibu 454 For Sale $8,000. my art website http://www.louietrangallery.com/ my 68 Longstep...No Shortstep Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=296736



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