Question about 2000 Isuzu Trooper
Actually, honeymonkey, the camshaft pulley turns exactly once for every two revolutions of the crankshaft. (pretty sure that was just a mental juxtaposition on your part) That is how you get a 4 stroke engine: the piston has to go up and down twice to complete one power cycle.
Now, as for aligning the engine: This is fairly straightforward. All you need to do is to set the cam marks and crank marks to #1 top dead center. The crankshaft position can be verified with a straw or something inserted into the #1 spark plug hole and turning the engine slowly with a wrench. The camshaft position can be verified by removing the distributor cap and making sure the rotor is pointed to the #1 spark plug position AND the marks are lined up at 0 degrees TDC. If the chain or belt is off by 1 tooth the motor will not likely start, so don't spend a bunch of time getting it exactly on the line. If the marks are close enough to get the chain or belt on, it is probably right. You may need to loosen the distributor and turn it forward or back A LITTLE to get 'er started, but DO NOT do this until you are satisfied the cam and crank are timed OK. It is your only reference mark for static cam position. The motor will sound funny when cranking if the cam timing is off. Good Luck!
Posted on Jan 24, 2013
It's more to it than aligning the marks since the cam pulleys turn about three times or more to one turn of the camshaft on this engine. You need to find someone that is experienced on this vehicle.
Posted on May 13, 2009
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