Standing on the drivers side of your car, remove the air filter & check the intake manifold to the left of the distributor. You'll find a six or seven digit number that will eliminate guess work. I'm providing two links for you: http://corvette-world.com & http://www.corvettec3.ca ... the best of luck with your detective story.
Blocks that have more nickel have 010 or 020 under the timing cover, meaning 10% and 20% nickel.
For this question to be answered you must provide the number that is above the timing chain cover. it is a 1978-1990 2 or 4 bolt main
Connect a timing light according to the manufacturers instructions to the Number 1 (front) spark plug cable. Run the engine at 2500 rpm. Loosen the distributor clamps and rotate the distributor until the "S" mark on the crankshaft front pulley lines up with mark on engine casting as timing light flashes on. When distributor timing is correct, tighten the distributor clamps.
The casting number on a Ford 302 V8 engine is typically found on the engine block, on the driver's side, just above the oil pan rail. It may also be located near the front of the block, around the timing chain cover area. Look for a series of numbers and letters that indicate the specific casting used for that engine. Additionally, the numbers may be stamped into the metal, making them more challenging to see without cleaning the area.
The engine coolant temperature sensor is located at the timing belt end of the engine on the water outlet casting.
I just got one on Ebay...$50
what engine?
The timing marks can assist a mechanic in setting the engine timing. The number one timing marks will set the number one piston so that the number one valve can be properly adjusted.
To set the timing on an engine that is not running, first, ensure the engine is at TDC (top dead center) on the compression stroke for the number one cylinder. Next, locate the timing mark on the crankshaft pulley and align it with the timing pointer on the engine. Finally, adjust the distributor or ignition coils to match the specified timing degree as per the manufacturer’s specifications, ensuring all connections are secure before starting the engine to verify the timing.
To set the timing on a 1997 Nissan pickup, first, ensure the engine is at operating temperature and then turn off the engine. Next, locate the timing mark on the crankshaft pulley and the timing scale on the engine. Use a timing light to check the timing by connecting it to the number one cylinder spark plug wire and aiming it at the timing marks while the engine is running. Adjust the distributor as needed to align the timing mark with the specified timing value found in the vehicle's service manual.
To connect an A B timing light on an EM7 Mack engine, first, ensure the engine is off. Attach the timing light's power leads to the battery (positive to positive and negative to ground), then connect the inductive pickup around the number one spark plug wire. Start the engine and aim the timing light at the timing marks on the engine's harmonic balancer to check the ignition timing. Adjust the timing as necessary based on the manufacturer's specifications.
To set the timing on an Oldsmobile Delta 88, first ensure the engine is at operating temperature and then turn off the engine. Locate the timing mark on the harmonic balancer and the timing tab on the engine. Using a timing light, connect it to the battery and number one spark plug wire, then start the engine. Adjust the distributor until the timing mark aligns with the specified degree on the timing tab, usually indicated in the vehicle's service manual.