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 |
ArtechnikA |
Aug 9 2005, 02:06 PM
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#2
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rich herzog Group: Members Posts: 7,390 Joined: 4-April 03 From: Salted Roads, PA Member No.: 513 Region Association: None |
depends what you're trying to do, and what you've already done. exactly how big is this "the" hole you've drilled? was it a very small hole, contained entirely within the steel stud, which you were then able to remove? if so, in that case, you should only need the thread to chase the original M8x1,25mm threads, right? and you'd be good to go. or was it bigger? did you make a new, bigger hole in the aluminum head, completely oblitering the old hole? if so - is the new bigger hole *exactly* concentric and coaxial with the original hole? if you were going to tap it - what size? do you already have a new stud lined up? or were you going to HeliCoil/TimeSert your new bigger hole and use an original style M8 stud? all those ways are plausible and possible, but i've lost track of exactly where you are and what you've already done. so - original clean 8mm threaded hole, or something bigger, and what's yor plan exactly ? |
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