Broke my exhaust manifold bolt [Archive] - Forum


View Full Version : Broke my exhaust manifold bolt

08-27-2008, 07:43 PM
I was taking my exhaust manifold bolts off, and the one snapped off. What do I do, attempt to drill it out... lol risky operation... im kinda lost here... would it be faster just to pull the heads considering im replacing headgasket?

08-27-2008, 07:52 PM
i would imagine soo since it has to come off anyways.

08-27-2008, 08:18 PM
Front or rear mani? When I swapped mine I snapped one of the crossover pipe bolts, but then I sprayed them all with pen oil and they came off like cutting butter.

08-28-2008, 04:40 AM
i sprayed all my manifold bolts with pb blaster, but the front one snapped.

08-28-2008, 06:07 AM
If you can somehow get it out (plyers or something) and need a new one I can help ya out

08-28-2008, 08:16 AM
no the bolt broke in my heads... no way i can get plyers in there. Idk if drilling that out is safe.

08-28-2008, 08:24 AM
I would think that drilling it would be your only option. The heads are aluminum so I'm sure yout not the first guy this has happened to.

08-28-2008, 09:16 AM
need more input on this.. any ideas what i should do

08-28-2008, 09:35 AM
Try this?

For stuck or very hard to loosen bolts you may need some special penetrating oil that will help loosen stuck bolts. If that doesn’t work, you may need to invest in a propane or oxy-fuel torch. Heat the stuck bolt until it starts to glow, while it’s glowing tap it somewhat hard with a hammer, by heating it and tapping it, it should help loosen the bonds that hold the bolt in place. After the bolt cools try removing it. If for whatever reason it still won’t come out, try more penetrating oil.
-If you happen to break a bolt head off and the rest of the bolt is still in the block or whatever, there is a way to get it out without having to drill and re-tap. If you go to your local hardware store there are some special spiral bits (called easy outs) that look like drill bits with a reverse threading. All you need to do to get the broken bolt out is first drill down about a 1/4” through the broken bolt with a smaller drill bit, insert the correct size easy out into the drilled bolt, hit the top of the easy out lightly with a hammer, then while holding the easy out with a wrench or something similar start loosening the bolt.

08-28-2008, 10:12 AM
Thanks, I'm going to try that.

08-29-2008, 08:17 AM
^ That is the correct way of doing it in the alumi heads.

It would also be easier while its attached to the car.

08-30-2008, 12:16 PM
get a 90 degree drill and a screw extractor,thats what im doing