Question about 1990 Geo Storm
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Posted on Jan 02, 2017
The timing marks are located near the top of the crankshaft pulley on the plastic timing belt cover. There is a notch in the pulley to mark TDC (Top Dead Center)
Align the notch with the 0 mark on the plastic cover to set your base timing.
Ground the proper circuit on the ALDL connecter located under the dashboard somewhere under the steering wheel. Check the manual for the proper circuit to ground.
With the engine warm and the circuit grounded. Set the proper timing. Un-ground the circuit and you are done.
Posted on May 12, 2009
GM Storm/Spectrum 1985-1993 Repair Guide
Timing Belt - REMOVAL & INSTALLATION
Although timing belts may last for thousands of miles past the recommended replacement interval, they should be replaced every 60,000 miles to prevent trouble or damage should they snap. Timing belts do not usually give an indication that they are worn or aging without removing the cover(s) and inspecting the belt. A worn or damaged belt could give out at any time. In some cases, should a timing belt snap while the engine is running, damage could be done to the valve trains or pistons requiring a partial or full engine disassembly. Also, should the belt go when the vehicle is far from home, a costly tow or even more costly repair job and considerable inconvenience may be suffered.
Timing belts must always be handled carefully and kept completely free of dirt, grease, fluids and lubricants. This includes any accidental contact from spillage, fingerprints, rags, etc.. These same precautions apply to the pulleys and contact surfaces on which the belt rides.The belt must never be crimped, twisted or bent. Never use tools to pry or wedge the belt into place. Such actions will damage the structure of the belt and possibly cause breakage.
(see Figures 1, 2 and 3)
The engine must be removed from the vehicle for this procedure to be performed.
Fig. 1: Timing belt routing - SOHC engines
Fig. 2: Align the crankshaft timing gear keyway with the mark in the oil pump - SOHC engines
Fig. 3: Check the timing belt tension at the center of the longest point between pulleys - SOHC engines
Storm - SOHC ENGINE
(see Figures 1, 2 and 3)
For DOCH Engine, can visit autozone.com (free register) for more details.
Hope helped with this (remember rated this help) Good luck.
Posted on Nov 05, 2009
Click on the following free, direct Link. It has the Timing Belt Diagrams, including Marks and Instructional Diagrams.
Let me know if this helped...
Posted on Apr 08, 2010
most of the time there will be one mark on the crank pulley gear and the one on the cam pulley gear.usually a dot or a straight line.
Posted on Apr 17, 2010
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