Exhaust Studs Broken.., need suggestions. |
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Exhaust Studs Broken.., need suggestions. |
DougC |
Aug 9 2005, 11:05 AM
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#1
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Senior Member Group: Members Posts: 949 Joined: 6-July 04 From: Dallas, TX Member No.: 2,307 |
OK, I have 3 broken exhaust studs on my 2.7 six. All but these three came out easily but these 3 were never going to move! I spray (for several days) with PB blaster, used a torch and nothing worked. Finally I bent one on purpose because I was at my wit's end and eventually broke it. I went ahead and cut the other two off in preparation for drilling. I have drilled out the originally broken one and tried using an "ease-out" but no luck (of course). I'm at the point where I can actually tap the hole for the original thread size. What size tap do I need to buy?
Doug C |
TimT |
Aug 9 2005, 03:11 PM
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#2
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retired Group: Members Posts: 4,033 Joined: 18-February 03 From: Wantagh, NY Member No.: 313 |
As has been mentinioned, left hand drill bits are your friend.
I dont have pics to show, but on a 911 I owned years ago, a p/o had broke an exhaust stud, then broke the easy out. So the PO's repair was to sister the remains of the original stud with another stud, then he cut a slot in the exhaust flange and used a large fender washer to capture the flange.. This IS NOT THE WAY TO FIX THIS What I ended up doing was having the head put in a mill, and had a 3/8 or so mill plunged into the head. I then took a bottoming tap and tapped the hole, then threaded a slug into the hole.. After I reassembled the engine bolted up the exhaust, and drilled and tapped my repaired head. So I ended up saving a potentially ruined head. If youve already drilled the stud out to almost take a tap, get some letter or number drills, and you will be able to gradually open the hole up until the exact size for the tap.. |
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