Question about 1985 Oldsmobile 98

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Need to know where hose under hood goes to allow heat in 1984 Olds Regency 98

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There are 2 and there is a heater control valve in one of the lines. One off of the back of t5he intake manifold going to the firewall another off of the front of the engine I think the water pump heading to the firewall. The one off of the intake should be the one with the heater control valve in it

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