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Re: Two broken exhaust manifold studs Posted by TML [Email] ![]() ![]() ![]() In Reply to: Two broken exhaust manifold studs, tz, Fri, 24 Sep 2010 16:41:28 Members do not see ads below this line. - Help Keep This Site Online - Signup |
I should point out that trying to do exactly what you're doing is what led me to have to replace my head altogether. In the process of trying to drill a pilot hole in one of the studs I drilled into the head. I had a pretty good assortment of tools, too. This included a right angle pneumatic drill, a centre punch, and a drill guide. There are two huge obstacles. The first is you can't see very well what you're doing. The second is poor access. Even if you manage to get a pilot hole drilled into the stud (close enough to centre and straight) without damaging the head, imagine how you're going to be able to hammer in whatever stud removing tool you're going to use. There just isn't the room to get the proper momentum from the hammer. I can't remember which cylinder #4 is, but if it's the one on the passenger side, don't even bother trying. If it's on the driver's side, it's worth trying - just make sure you keep checking where you're drilling, what angle it's going in, and how far you've gone in. Obviously you'll need a good inspection mirror and focused light source. If you're not having much success on one, try the other one. If you can get even one fixed, you're in ok shape. (This is where I screwed up - I got one fixed but couldn't leave well enough alone after that). If you use a stainless replacement stud, it will definitely outlive the car, but a new standard one probably will as well at this stage. Don't use the long stud with the spacing collar, as these fail far sooner than the shorter ones. I've personally never seen one of the shorter ones break, whereas it's rare to see one of the longer ones survive to age 10. I'm sure there was some reason for the longer stud and spacer, but I'm sure in retrospect it was considered a mistake.
posted by 99.248.17...
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