On a 5.7 Vortec engine, the timing marks are located on the harmonic balancer and the timing cover. The harmonic balancer has a notch or mark that indicates the timing degree, while the timing cover has a corresponding timing pointer. To set the timing, align these marks according to the specifications provided in the service manual. Always ensure the engine is at the correct position (usually TDC on the compression stroke) when checking or adjusting timing.
http://www.truckforum.org/forums/gmc-truck-forum/10885-97-5-7l-vortec-timing-reset-question.html
I could be wrong, but I have a Vortec 350 in a GMC truck and I think the computer handles the ignition timing. If your talking about valve timing I would assume there are marks on the timing gears like the days of old, but I haven't torn the timing cover off of mine yet.
There is no more timing marks for a 98 vortec you have to go off marks on distribitor & use a scanner. You are setting cam timing
2nd to the v mark
There is no ajustment for the timing on vortec engines the computor does it automaticly
Timing is set by the PCM and is not adjustable.
Timing is set by the PCM and is not adjustable.
On the Vortec the computer does it all.
The timing marks on your Isuzu 4hf1 engine can be set by looking at the timing marks on the timing belt pulley. The timing belt marks are facing towards the front of the automobile.
The timing marks on your Isuzu 4hf1 engine can be set by looking at the timing marks on the timing belt pulley. The timing belt marks are facing towards the front of the automobile.
Timing marks are on the sprockets and on the timing belt itself. No other marks are necessary.
timing marks are , marks on camshaft sprocket, an on crankshaft sprocket'.