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Old 12-15-2006, 11:30 PM   #1
epson1
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Default help with botched sensor install!!!

Well after my grueling install of my gauges i managed to mess somthing up. after attempting to tap the manifold i mis taped it and noe i can't thread it. or it would take an act of god to tap it. anyway i can fix the problem buy drilling the hole out and putting in a bigger bolt? i'd weld the sensor on but i have no cast iron welding skills
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Old 12-15-2006, 11:31 PM   #2
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Professional shop FTW!
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Old 12-15-2006, 11:39 PM   #3
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sorry you cant use **** as a thread title...im sure they will lock this thread
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Old 12-15-2006, 11:40 PM   #4
imaaaron
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Find a local machine shop. Shouldn't be more than $50.
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Old 12-15-2006, 11:54 PM   #5
epson1
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the title was "*****!" but i see someone changed the title and im glad it didn't get locked. but anyways i have a 800$ tapping kit i got from a mech. at a meat packing plant. i'd preferably not want to pay more money... but the threads are pretty messed up
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Old 12-16-2006, 02:28 AM   #6
nhluhr
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I moved your thread out of the "newbie" forum to the engine tech forum with hopes you'd get more help...

to aid in getting that help, can you describe more fully what is messed up about the threads? Typically, if they are just "messed up", you can drive the tap in carefully to create new threads. You need to be sure and use tap cutting fluid (lots of it) and it helps to have the manifold clamped in a vise to keep it from moving while you use your T-handle to drive the tap in.

If the threads are bored out too much, you will likely need to go to the next bigger size and buy an appropriate plug for the threads, then drill/tap the other side (there is an identical casting button on the backside of the manifold that works just as well). Obviously be careful this time
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Old 12-16-2006, 01:49 PM   #7
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How can i seal the hole i already made and use the other "button" on that opposite side?
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Old 12-16-2006, 09:35 PM   #8
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Whatever you do, don't weld the probe in place. I sure hope you were joking about that part.

Can you post a pic of your carnage?
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Old 12-17-2006, 05:08 AM   #9
epson1
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What i've decieded to do so i don't completely screw it up is drill out the crapped hole, thread it and put a bolt with some thread lock on it and i'll take it to a machine shop to have the good side drilled and tapped so i can't mess it up.
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Old 12-17-2006, 05:11 AM   #10
nhluhr
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No commercially available threadlock I'm aware of will actually withstand the heat that the exhaust manifold sees. You just need to put in a fresh clean bolt and take it in as hard as it'll go to make sure it never falls out. You could safetywire the bolt to help make sure it doesn't come out over time.
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