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Username Post: Heater Plumbing
raycow 
Honored Member
Posts: 27580
raycow
Loc: San Francisco, CA
Reg: 11-26-02
11-28-17 02:33 PM - Post#2716122    
    In response to Jack Crain

If you have a 235, the hose connection at the thermostat housing is the "hot" line and the one at the water pump is the "cold" line.

Normally, you want the flow through the heater core to be from bottom to top. This reduces the chance of an air bubble getting trapped in the core. Therefore, the thermostat housing hose should connect to the lower nipple on the core and the water pump hose should connect to the upper nipple.

If any questions, please ask.

Ray
Those who choose an automatic transmission want transportation. Those who choose a manual transmission want to drive.

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