They are on the side of the engine block there is a plastic shield covering them your going to need a Allen wrench to take the plastic covering off
The 1991 Mercury Marquis spark plug gap is .034. Most spark plugs will be pre-gapped by the spark plug manufacturer.
on top of the spark plug
Your auto parts dealer can give you this information when you purchase your spark plugs. But a 1998 Infiniti QX4 gap is .041.
what is the setting of the spark plug gap for a 1991 chev caprice .035
when do you have to change a spark plug and how many miles when do you have to change a spark plug and how many miles
check autozone website under specifications.
The 1991 Suzuki 250 dirt bike spark plug gap is .019. Most spark plugs will come pre-gapped from the spark plug manufacturer.
check were the headers are or they will be under the spark plug cover on the engine cover one of these spots
The 1991 350 cubic and Chevrolet engine spark plug gap is .027. Most spark plugs will come pre-gapped from the manufacturer.
To change the spark plugs in a Chevy Celebrity: 1. Give the spark plug boot a twist to free it up from the spark plug, then pull on the boot to remove the spark plug wire from the spark plug. 2. Use a 5/8" spark plug socket with an extension and ratchet or breaker bar to loosen then remove the spark plug. 3. Set the gap on the new plug to .045" then screw it back into the spark plug hole in the head. Tighten the spark plug and replace the spark plug wire. I change the spark plugs one at a time to keep from getting the spark plug wires on the wrong spark plug.
Bosch OE fine wire Iridium spark plug gap is preset. Do not gap.Other aftermarket spark plugs range from .040" to .044" gap.
The spark plug gap for a 1991 Chevy Silverado 2500 V8-350 is .035, according to major spark plug manufacturers (i.e. Autolite, Bosch, Denso, NGK).