L-Jet TPS is all oily, the bottom of the Throttle Body etc.... |
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L-Jet TPS is all oily, the bottom of the Throttle Body etc.... |
malcolm2 |
Oct 3 2016, 08:43 PM
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#1
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Advanced Member Group: Members Posts: 2,747 Joined: 31-May 11 From: Nashville Member No.: 13,139 Region Association: South East States |
Taking the TB off to be rebuilt and could not help but notice that the under side is covered with oily dirt. 20,000 miles since I put it all together, but this area has, by far, the worst build up.
The boot seems pretty stiff but no obvious cracks of holes. 1. I assume the oil is coming from the oil tower filler neck. But why would it blow out with air sucking in? 1st thought the stiff boot did not make a good seal and this is my vacuum leak. But again shouldn't it suck in? But the btm clamp screw on the boot was very tight. 2. is this normal? 3. are the "S" boots available new? |
Rob-O |
Oct 4 2016, 08:15 PM
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#2
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Senior Member Group: Members Posts: 1,252 Joined: 5-December 03 From: Mansfield, TX Member No.: 1,419 Region Association: Southwest Region |
Are you missing any of the oil seals in the cap? That would allow a steady flow of oil misted air right back into the intake. There are two baskets on the cap. A lower, then a spring that circles the cap and then an upper seal. These are ON the cap. If the lower seal is missing or hardened, it would allow oil pass to the tube that runs to the intake. The upper seal just seals the cap, so oil doesn't get out of the top of the filler.
There are two other gaskets on the oil filler itself. The cork gasket that fits between the engine block and the oil filler housing. There is also a small o-ring that fits between the two pieces of the filler assembly (the oil filler neck and the oil filler housing). |
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