Broke a manifold stud.......
Thread Starter
Safety Car
Joined: Dec 2004
Posts: 4,876
Likes: 1
From: Jersey Shore Exit 98
Broke a manifold stud.......
I broke a manifold stud in the enging block. What's the best way to remove it. Its flush w/the block so I can't grip it. Other then drill it out any thoughts.
Thanks
Thanks
Intermediate
Joined: Mar 2005
Posts: 34
Likes: 0
this happened to me before get a drill and drill a straight line in it so it looks like a flat-headed screw, grab a screw driver and unscrew it if its hard, then put a screwdriver bit in a drill and get it out like that...hope this helps
Thread Starter
Safety Car
Joined: Dec 2004
Posts: 4,876
Likes: 1
From: Jersey Shore Exit 98
But I was hoping of an easier way.
Intermediate
Joined: Mar 2005
Posts: 34
Likes: 0
dont ruin a perfect thread get a thin drill bit, and drill holes from one end to the other and then grab a screwdriver and unscrew it out of the thread
(--) drill holes like this then unscrew it using the screw driever or a drill with the right bit
(--) drill holes like this then unscrew it using the screw driever or a drill with the right bit
Le Mans Master
Joined: Oct 2006
Posts: 7,123
Likes: 433
From: Gladstone MO
C3 of Year Finalist (appearance mods) 2019
Is the head/engine out of the car? That would make life easier.
Drill & Tap is just about the only way I can think of. And drill it straight! sown the center. Start with a small bit, go slow use lots of lube on the bit. Drill all the way thru the old bolt, then increase the size of the bit, up to the tap drill size for 3/8. (I think it's 11/32). I've done this too. Begin with about 1/8" bit and go up a couple sizes at a time.. Getting the hole straight and in the center is the key.
I feel your pain
Drill & Tap is just about the only way I can think of. And drill it straight! sown the center. Start with a small bit, go slow use lots of lube on the bit. Drill all the way thru the old bolt, then increase the size of the bit, up to the tap drill size for 3/8. (I think it's 11/32). I've done this too. Begin with about 1/8" bit and go up a couple sizes at a time.. Getting the hole straight and in the center is the key.
I feel your pain
Racer
Joined: Feb 2006
Posts: 299
Likes: 1
From: San Antonio TX
The problem with the bolt/screw removers/taps that you drill and then reverse screw in is they actually spread the bolt and make it harder to take out. Sears Craftsman makes a new type of extractor that actually grab the bolt but doesn't require you to drill into the bolt. No drilling also means no mess to clean up.
Instructor
Joined: Nov 2006
Posts: 130
Likes: 1
From: Wylie TX
I just went through this on the studs for one my driver side exhaust maniflold (one of the studs broke changing a donut gasket). I used the bolt extractor from Sears, and then cleaned the threads with the appropriate tap. Seemed to work very well for me. it does take patience though.
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Le Mans Master
Joined: Apr 1999
Posts: 6,134
Likes: 46
From: Raleigh North Carolina
Bolt Extractors or E-Z Outs typically snap off unless the bolt is already loose and ready to come out. Then you have to take it to a machine shop to get the broken EZ Out out. EZ Outs (extractors) are hardened. Once you snap one off, you're not going to drill it out.
Since this bolt is broken off below the surface, anything that needs to grip the bolt cannot be used either.
The bolt snapped off... this tells me it's stuck quite hard and will not just "screw out". This pretty much eliminates the drill & screwdriver technique. If it snapped off, then it's not going to unscrew with a screwdriver.
This leaves two other methods I can think of-
Weld another bolt to the end if it and carefully work it loose with penetrating fluid, or, center punch, drill, and re-tap.
Since this bolt is broken off below the surface, anything that needs to grip the bolt cannot be used either.
The bolt snapped off... this tells me it's stuck quite hard and will not just "screw out". This pretty much eliminates the drill & screwdriver technique. If it snapped off, then it's not going to unscrew with a screwdriver.
This leaves two other methods I can think of-
Weld another bolt to the end if it and carefully work it loose with penetrating fluid, or, center punch, drill, and re-tap.
Safety Car
Joined: Jun 2004
Posts: 4,364
Likes: 221
From: Beecher Illinois
I had a bolt break off because it was seized to the aluminum intake manifold. Not because it was tight or anything. One of the bolts at the water passage. Once I drilled a small hole into it and stuck an easy-out into the hole it screwed right out, hardly seemed tight at all.
Mike
Mike
Burning Brakes
Joined: Sep 2005
Posts: 755
Likes: 1
From: Hobart Tasmania
I watched a professional guy remove a broken stud on my car, he used a left hand drill bit. It partially drilled a small hole but then actually unscrewed the stud. Putting a bit of WD40 or similar also wouldn't hurt.
Thread Starter
Safety Car
Joined: Dec 2004
Posts: 4,876
Likes: 1
From: Jersey Shore Exit 98
Safety Car
Joined: Oct 2000
Posts: 3,547
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From: Carbondale Pa.
Heat sometimes helps getting stuck fastners out, even broken off ones. But you need to get in front of actually using heat, drill your holes, get your easy out started, or your reverse drill bits and then heat it ,,,just dont burn the car or garage down. Peace,,,Moosie 