 Throttle body - am I missing parts? |
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| rjames |
 Nov 28 2018, 11:52 PM
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#1
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I'm made of metal  Group: Members Posts: 3,948 Joined: 24-July 05 From: Shoreline, WA Member No.: 4,467 Region Association: Pacific Northwest 
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I am chasing down a vacuum leak.
I replaced a worn late throttle body with a NOS early throttle body. A throttle body rebuild post I came across shows a brass ring seal and a seal that goes around the shaft on the end where it enters o the throttle body. Neither of the TBs I have have the brass ring or the seal. Are there supposed to be a ring & seal on each side of the TB? Are these available? Are they necessary? Are they the cause of my vacuum leak? I can't detect any play in the shaft. Picture I found that shows the brass ring  Pic of a post I found that shows all the parts:  |
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| BeatNavy |
Nov 29 2018, 10:54 AM
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#2
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Certified Professional Scapegoat Group: Members Posts: 2,924 Joined: 26-February 14 From: Easton, MD Member No.: 17,042 Region Association: MidAtlantic Region
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Yes, that bushing is a repair on the throttle body. I believe that is an oilite (or similar) bushing used to correct any play / wobble in the shaft. I did this to my TB a year or two ago following r3dplanet's thread from a while back.
Removing the plenum is small PITA, but not too much more effort once you've got the TB removed. Primary issue is getting the boots off the intake runners. Then it simply unbolts from the case, IIRC. Plenums do crack, and it is a worthwhile place to look for vacuum leaks once the other usual suspects have been rounded up and questioned. |
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| rjames |
Nov 29 2018, 11:01 AM
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#3
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I'm made of metal Group: Members Posts: 3,948 Joined: 24-July 05 From: Shoreline, WA Member No.: 4,467 Region Association: Pacific Northwest
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QUOTE(BeatNavy @ Nov 29 2018, 08:54 AM)  Yes, that bushing is a repair on the throttle body. I believe that is an oilite (or similar) bushing used to correct any play / wobble in the shaft. I did this to my TB a year or two ago following r3dplanet's thread from a while back. Removing the plenum is small PITA, but not too much more effort once you've got the TB removed. Primary issue is getting the boots off the intake runners. Then it simply unbolts from the case, IIRC. Plenums do crack, and it is a worthwhile place to look for vacuum leaks once the other usual suspects have been rounded up and questioned. Thanks! |
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Posts in this topic
rjames Throttle body - am I missing parts? Nov 28 2018, 11:52 PM
bretth I believe the brass bushing is an aftermarket upgr... Nov 29 2018, 10:38 AM
rjames
I believe the brass bushing is an aftermarket upg... Nov 29 2018, 10:45 AM |
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