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Old 09-05-2009, 12:21 PM   #25
Blue-S
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Join Date: Jan 2009
Location: Corona, CA.
Posts: 129
belt install

Quote:
Originally Posted by eightsandaces
The upper cam marks are within sight, the intake at about 1:30 and the exhaust at about 4 o'clock, to their respective aim points with the crank pulley notch at the bottom. Since the car was in perfect timing and the auxiliary pump can just be reset to 1, I am strongly thinking of just putting the components on and carefully turning the crank, the timing should not have changed if nothing else has moved and I am confident it has not.
It sounds like you are saying that the camshaft sprocket marks are 90 degrees clockwise from their respective pointers, and the crankshaft timing mark is 180 degrees from its correctly timed position. This assumes that "straight down" on the crank pulley notch is 180 degrees from the timing position - I don't remember. If the components are positioned the way I think they are, then it does appear to be in time. Pistons #2 & 3 should be at TDC right now; I don't remember which of those two cylinders would be firing. If you want to put the belt on the way it is now, it sounds like you can do so. If you want the aux shaft sprocket to be in "correct" time (not that it really matters), just ensure that its timing mark is 90 degrees clockwise from the normal timing position.

If you choose to install the timing belt the way it is now, be sure to remove the spark plugs and verify that #2 & #3 are at TDC, install/tension the belt, then carefully turn it over (clockwise) by hand to verify that the timing marks all line up correctly. After that, you might want to turn it over by hand two more revolutions of the crank to be totally certain that everything is timed correctly. It's not uncommon to find a cam off by one tooth on your first attempt to install the belt.
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Blue-S
2000 Boxster S 6-speed - Ocean Blue / Savanna Beige

* 9x7 short shifter * Pedro's enthusiast mount * Carrera Ltw. wheels * Stebro bypass pipes
* M030 coming soon! *
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