It is zero at top dead center as long as the #1 piston is all the way up on the compression stroke.
set to zero degrees base timingthe computer controls actual timing
To set the timing mark on a 1997 Nissan pickup truck with a 2.4L engine, first, ensure the engine is at top dead center (TDC) on the compression stroke for cylinder one. Locate the timing marks on the crankshaft pulley and the timing cover; align the mark on the pulley with the zero mark on the timing cover. If necessary, adjust the distributor to align the rotor with the number one cylinder contact in the cap. Finally, double-check the alignment and secure all components before starting the engine.
There is one on the timing belt plastic cover and it's a scale from 0 to 15, another park is on the engine body behind the camshaft pulley. The hole in the camshaft pulley must align with the mark on the engine body and zero on the timing belt plastic cover.
Timing mark on the crankshaft pulley (mark should be at zero) must be aligned with the mark on the camshaft pulley (mark should be in the middle of the hole in the pulley).
I presume it has a dizzy "Yes" well near the firewall directly above the dizzy there should be a plug hanning out of the loom unplug it & set the timing on zero by matching the timing mark on the harmonic balancer & the marks on the timing cover then turn the engine off & plug it back in. the ecm looks after it after that using info from the knock sensor & so on CORRECTION: The plug for this vehicle is in the passenger compartment, on the passenger side under the carpet against the fire-wall. It is part of the wiring harness that goes from the engine to the ECM (which is located to the right of and under the glove compartment). It is a tan wire with a black stripe. This disconnects the EST circuit which must be done to properly set the timing. See the WikiAnswer to the question "Where can you find the EST wire on a 92 Chevy Blazer S10 4.3 Vortec?"
To align the cams in a 1996 Toyota Camry, first be sure the number one piston is at the top dead center position. After this is put into place, the lower timing cover and the crankshaft pulley should have a temporary notch that is lined up with the zero mark on the timing cover. A small hole in the crankshaft gear should be pointing straight up and lining up with a mark on the front cam bearing housing. There should be no slack in the timing belt, and the engine should then be rotated a few times by hand to make sure that the marks are still aligned.
The advantage of taking the lowest mark on the main scale as the zero mark over the centre-zero is that it covers for all the errors that may happen.
The advantage of taking the lowest mark on the main scale as the zero mark over the centre-zero is that it covers for all the errors that may happen.
zero degrees top dead center with an idle speed of 5-10 mph
zero degress BTC. There is also a brown wire that needs to be disconnected while adjusting the time. Some models it is under the dash and others it is near the wiper motor. I can't remember for sure which one the '94-4.3 location is at. i have done all of that the damper mark is still not showin up under the timin light anywhere near the degree marker
set the harmonic balancer pully to zero there are 2 notches on the cam shaft pullies that should align with a mark on the mounts
It should be pointing to the #1 cylinder, That is the first spark plug on the driver's side up front.