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Q: How many O-Rings or Seals are on the Throttle Body Shaft? 200 1989

posted by  diyer on  Sat Feb 16 05:54 CST 2008
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last visit: Tue Nov 29 10:45 CST 2011
[RELATED]

89, 240, NT, LH 2.4,
173K

While cleaning the TB, as part of a fix for cold start/running idle problems, I discovered a good bit of oil in the TPS. I removed the TPS and put some electronic cleaner into the opening of the TPS where the shaft from the TB goes. A good bit of oil came out. It is hard to imagine oil [or condense crankcase vapors] migrating from the bore of the TB and up [against gravity] along the shaft and into the TPS. Now that everything is all cleaned up, I read in the archive that there are O-rings [as in several, not just one] on the TB shaft. I only saw one O-ring the goes onto the female shaft end of the TPS, and it touches this raised metal ring that is around the TB shaft where it meets with the TPS. But I fail to see where "that" O-ring would be able to stop any oil flow into the TPS [assuming it does migrate up the TB shaft from the TB bore].

My shaft is about 22 mm, but not more than 22.5 mm. So, I am really not inclined to remove the two screws [the ones that are split [staked in half longways] in the bore on the TB shaft, even if I can put them back with threadlocker and torque them up properly. I just don't want to mess around getting the plate off center, etc. I wouldn't mind picking up a used TB from a yard and practicing on it, but right now I need to get the idle problem fixed and get this vehicle inspected.

So, the main question is whether the TB shaft has just that one O-ring on the end or if there are tiny Orings along the TB shaft that cannot be seen without removing the shaft itself? Anyone know?


thanks, diyer






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