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how do you replace a heater core in a 91 Oldsmobile 98
134a
Only the Olds Intrigue with the 3.5 L
5 quarts
Under the glove box.
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punt
Dealerships or junkyards.
Heater core is inside dash board by firewall.
it is in the middle of the car inside thedash area on the very bottem of the coverd areA back by the foot area you need 7mm and alot of time about 2 hours to change it
you need to replace your heater core.
On the air intake filter box