Question about 1990 Buick Skylark
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Posted on Jan 02, 2017
SOURCE: Heater core
Pull the panel under the glove box. You should be able to see the heater core. disconnect the two hoses under the hood on the firewall to the heater core. put a pan below to catch the antifreeze. Replace heater core. reconnect hoses.
Posted on Sep 11, 2009
Drain the coolant first. Use an 18 mm box wrench on the serpentine belt tensioner to relieve tension and take off the belt. (On some models, you might need to remove a motor mount or loosen and push aside the power steering pump.) Now you are ready to remove all the bolts. Remove the pump. Scrape away all remnants of the old gasket. If some of the bolts are corroded, you had better replace them or they might break next time you change the pump. Apply gasket sealer to the new gasket. I always apply some gasket sealer near the head on the bolts to protect them from water, but I don't know if it does any good. Screw it all back on; there are some mating posts so you get it aligned right. Turn every bolt a little at a time in turn or you will make one side of the gasket thinner than the other. Rifill the radiator with new coolant. You should be good to go. But check for leaks.
Here is a series of videos, which I hope works similar to your car:
Posted on Jan 01, 2010
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