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Old 09-06-2007, 02:56 AM   #1
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Default Throttle body shaft snapped

Ya I wasnt going to post this but I figured it might save someones motor down the road. The adjustment screw that hits the throttle damper, or dashpot, had gotten loose on my car (i.e. throttle plate was not dampened) and i dont know how long it was like that. Well yesterday the shaft snapped in half at one of the bolts that hold the plate in place and thank god the bolt didnt go flying into my engine.

Luckily I have a few spare throttle bodies around, but as it turns out, the only difference between the MT and AT bodies is that shaft, however the MT shaft can be modified to work with the AT TPS. I had to cut it shorter, drill and tap for a retainer screw, and dremmel the end of it to form it into a key similar to what the AT shaft uses. It was a big pain in the ***. I also learned that the screws holding the throttle plate have been expanded at the ends and cant just be screwed out ... the ends of mine just snapped off. Its a great design though and if you ever change those screws, hammer the ends of them so they expand and your screws will not back out and **** up your combustion chamber/valves. The way I did this was by using a screwdriver with the butt against the ground and the key in the screw that I will be hammering, this way the stress is transmitted to the ground and not the throttle shaft.

I wish I had a camera to show what I did, but if you ever have this problem, let me know.
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Old 09-06-2007, 08:50 AM   #2
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Same thing happen to me on my race car, except those rivet heads went through the engine. Ran three more races on it after that. :gay: Definitely don't want to use the tb plate as the stop.
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