Question about Cars & Trucks
If you mean the marks on the crank pulley used to set ignition timing, there should be a mark cut into the pulley and a plate on the timing cover with marks to line up with. Or the marks are on the pulley and there is a tip on the timing cover.
Base timing should be around 10 degrees BTDC. With today's unleaded fuel, you may have to play with the timing to keep from having spark knock.
Posted on Jan 15, 2013
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Posted on Jan 02, 2017
The firing order is 1-5-4-8-6-3-7-2, distributor turns counter-clockwise. The ignition timing can be set using marks on the vibration damper. The wide mark is TDC (Top Dead Center), each mark after the wide mark represents 2, 4, 6, 8 and 10 degrees before TDC. Set timing 3 degrees BTDC (Before Top Dead Center). In addition, valve timingis set like this: Intake opens: 12 degrees BTDC
Exhaust Closes: 8 degrees ATDC
Posted on Feb 04, 2010
The timing marks should be on the outside of the timing belt cover and on the harmonic balancer. If you are unfamiliar with the proceedure I suggest getting a Chilton or Haynes manual. You will need a timing light to check the timing. Backfiring is caused by cold air being pulled into the exhaust system. Check for holes or loose connections in your exhaust.
Posted on Mar 28, 2010
6-8 degrees before top dead center. Be sure to remove & block the distributor vacuum line before setting the timing. After the adjustment replace the line. Good luck!
Posted on Feb 07, 2011
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