How to bypass heater core in '84 Olds Delta 88?

From the diagrams I've been able to find on that model, it should be near the heater core on the passenger side of the car closest to the cabin, under the hood.

You need repair manual. your library or
try http://www.manualslib.com

Here's a link to replacing your heater core. Repair Guides Heating And Air Conditioning Heater Core AutoZone com

Here's a link on how to replace heater core.

Hard to say on a older car such as this. If running well and healthly it should receive around 16 to 18 highway miles per gallon

1985 olds delta 88 steering column key removely

The Chilton's book will show you step by step instructions. It's a good thing to have when the next problem comes up, too.

any gm olds , buick caddy, pont, 4speed auto up to 1991 u just got make sure theyre not computer controlled some 91 are n some aint stay away from 84 to 88 they had failures it doesnt really matter about engine size as along its same transmission

If your coolant is full, and the car is not overheating, it's probably not your thermostat, but you might want to make sure. Look on the heater hoses running to the heater core - there should be a solenoid valve in the supply one (I think it's a vacum solenoid). That ****** is probably toast.... I believe it's meant to shut the coolant flow off when the aircon comes on. You can either whack it, replace it, or, if the aircon doesn't work anymore, remove it and put a coupling in there.... if it's not that, then your heater core is probably plugged.

Hope this helps :)

depending on what year it is it could be under the car or right in front of the carb as a in line fuel fillter. I have a 84 olds delta 88.