How do you replace a heater core in a 1994 Oldsmobile Achieva?

Wiki User

2015-07-15 21:13:58

Re: How to replace 95 Achieva heater core...

Drain the antifreeze. Keep the drain pan under the heater core hoses. Disconnect the battery. Remove the hose clamps/ 2 hoses fom the heater core from under the hood in the engine compartment. These hoses are hard to reach. You can try to reach the hose clamps from under the raised car.

Inside the car: remove the center console if you have one (there is a little clip to pry out from the front of the trans-shift lever), heater ducts and covers and the square black plastic heater core cover. You will need various small sockets.

Then just snap the 2 straps loose and replace the core. Make sure that the hoses are not the source of the leaks. Replace the hoses if they are old. One of the hoses is 3/4" on one end and 5/8" on the other end. So, you will need a hose size adapter in the hose if it not a factory hose assembly. I dont remember the size of the other hose.

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It is about a 3 hour job. It would depend on the hourly charge of your local shop, plus the cost of the heater core. Which I think is around 30 bucks.

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The question you ask is too involved for a proper answer. you need to go to a car parts store, and get you a repair manual for your car. They cost about $16.00.

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