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How do i find top dead center on a nissan frontier qd32 engine?

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There are a number of ways. If it is a petrol engine, remove the number 1 spark plug, on a diesel remove the no. 1 injector (ouch). Place a straight sturdy wire (welding rod or cut off the long end of a wire clothes hanger) and gently push it down the cylinder. Have someone slowly turn the engine by hand using a socket on the front engine pulley while feeling the wire as it moves up out of the plug / injector hole. Never try doing this trick by turning the starter motor, it will end in disaster.
When the piston reaches top dead center, the wire will stop moving. There will be a slight movement of the crankshaft of about 10 to 15 degrees where it is difficult to feel any movement at all, so find the position half-way between where the wire stops moving up and starts moving down. This halfway position is top dead center.
At this point you should see a mark on the front engine pulley lining up with a pin or small plate on the engine block.
Otherwise, there will be a mark (a line) on the flywheel which should line up with a mark on the bell housing which you should be able to see through an inspection hole in the bell housing. Use a flashlight to see these marks line up.
Be careful, however. On a 4 cylinder engine either 1 and 4 (firing order 1-3-4-3) or 1 and 2 cylinders (firing order 1-3-2-4) are at TDC at the same time. It is too much of a hassle to mention all the engine types, just check the firing order and divide the number of cylinders by 2, the first half starts off with no 1 and whatever the number the second half starts off with, those two are at TDC at the same time.

Posted on Dec 15, 2014

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Posted on Jan 02, 2017

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Click to Enlarge 7924vg44.gif

Oil pump exploded view-2.4L engine
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