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PCA Member since 1988
Join Date: Feb 2018
Location: SW Washington State
Posts: 4,638
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The crank pulley has marks 120 degrees apart that indicate when the pistons are at TDC. The remaining question is when each piston is at TDC at full compression. That will become obvious when you hook up the leakdown tester.
Next item: The leakdown test may not tell you where the oil is coming from. Specifically, if the intake valve guides or seals are leaking oil, you will measure more or less normal leakdown numbers. But let's see what the test shows.
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1973.5 911T with RoW 1980 SC CIS stroked to 3.2, 10:1 Mahle Sport p/c's, TBC exhaust ports, M1 cams, SSI's. RSR bushings & adj spring plates, Koni Sports, 21/26mm T-bars, stock swaybars, 16x7 Fuchs w Michelin Pilot Sport A/S 3+, 205/55-16 at all 4 corners.
Cars are for driving. If you want art, get something you can hang on the wall!
Last edited by PeteKz; 03-09-2025 at 09:01 PM..
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