How do you change the heater core on a 1989 Oldsmobile Cutlass Ciera? or where can I get the Info on replaceing it
By the fuel tank , left side where the filler tube is.
An exploded view of the heater controls for a 1989 Olds Cutlass can be found in the Cutlass service manual. The manual can be found at most auto parts.
where is the horn relay
4.5 or 4 1/2 quarts..
You may want to consider replacing the thermostat.
folow your top radiator hose to the engine that is where the thermo stat will be at you will probly have to remove your air cleaner and throttle body to get at the thermostat housing
The 1989 Cutlass Ciera modern production spark plugs are pre-gapped from the factory and should not be altered. The OEM AC Delco Professional Platinum #41805 for this engine comes pre-gapped at .045 inches for reference purposes.