1991 940 SE Bypassing heater core

slunabrink · Post by **slunabrink** » 16 May 2014, 15:51

I just purchased a 91 940 SE. The windows recently started fogging and the coolant has been disappearing from the reservoir after a day of driving. How do I bypass the heater core? I don't have any need for a heater, living in Petaluma CA. I am not car savvy, so detailed, simple instructions would be really helpful. Thank you...

lummert · Post by **lummert** » 16 May 2014, 18:33

Find the heater control valve. Find heater hose coming from head (under the intake manifold). Find hose returning to water pump (behind the engine). Using whatever (need something with a 180 degree connection, such as two 90 degree fittings), connect hose from head to hose returning to water pump. Hose size is 5/8 inch.