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420a throttle body, help 420a turbo people

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scottyhops

10+ Year Contributor
227
3
Jun 14, 2011
sussex, New Jersey
alright so here's my story, i bought a 420a turbo, not knowing anything about these cars been working on dodges and moved over. any who 2nd day i had the car blew a piston up, so i rebuilt the car, wiesco pistons, eagle rods, main bearings,rod bearings, cometic head gasket, im waiting to do the head this summer, but there is one problem, i boost leak tested my car, everything is perfect....except the throttle body, i know everyone is gonna say swap it over to a 60mm but does anyone know a place that i can buy a seal for the tb shaft that will handle 15lbs of boost?? whats really the best thing to do in this case:confused:
 
hey man, but unfortunately the 420a is a Chrysler motor and i don't think the 4g63 seals will work, if im right for my tb shaft its a bearing, i don't feel like ripping my car apart to find out i can't drive it for a couple days, its my daily driver. anyone use the 4g63 seals on it by any chance??
 
hey everyone, if you have seen this thread i figured it out, the bearing on my 420a was leaking around the shaft, i looked on the tb shaft spring and my shaft wiggled up and down, so what i did was...
- took my tb off
-took all sensors off, tps and idol air i believe,
- than zip tied the spring so that i can remove the shaft with the spring in place and still attatched,
-took the butter fly out
- used brake clean and cleaned the throttle body
-than pollished up the valve opening with some rubbing compound
-used a penny to push the bearing back to where is was supposed to be
- than took a o-ring, its was like a double o ring but was just one, fit it snug on the shaft and slid everything back together
-clip over by the tps, all sensors on, than i cut the zipties, put the butterfly back on and tightened down everything, put it back on my car and bamb, no leak on my turbo 420a so i didn't buy a jeep tb
 
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