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 Help! I can't sort out which heater hose is which without a " program"Jump to page : 1 Now viewing page 1 [50 messages per page] | View previous thread :: View next thread |
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56D500boy |
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Expert 5K+ Posts: 9900     Location: Lower Mainland BC | . It's not ball game but I can't tell one player (hose) from another (hose)  Recently, I have been whining about my heater new Ranco-style Volvo heater valve isn't working properly. Sven (Wizard) replied with an annotated photo that suggests that the hot inflow to the heater valve should go to the curved tube on the Ranco valve. I found some Volvo 122 info that concurred with that suggestion. This thread: http://www.forwardlook.net/forums/forums/thread-view.asp?tid=75720 My problem is I have the valve oriented properly, i.e. curved tube up and the straight tube down (with the "U" hose to the lower heater core spigot tube). *HOWEVER* I might have got my heater inlet (water pump discharge) and outlet (water pump return) hoses mixed up. Here is what I have at the fire wall: *BUT* I might have been wrong when I decided which heater hose at the water pump housing was the discharge and which was the return (inlet). Here are all the photos that I have (some from 2021 when I replaced the water pump (again)) and one from 30 minutes ago. Please slap me upside the head and tell me which hose is discharge and which hose is return. I think we can call the two heater hoses at the water pump the "Short" nipple hose and "Long" nipple hose (also the higher of the two hoses and more in the center of the water pump housing). The "long" nipple hose is connected to the housing at a point just where the thermostat sits. I am sure that is a clue but my brain is not working today. (Had to change a cam position sensor on my wife's Hyundai Elantra and that broke my brain)  Edited by 56D500boy 2022-11-14 9:42 PM (DaveFs56DodgeD500V8WithNewNOSWaterPumpAndAdditionalEngineAndFramePainting.jpg) (DaveFs56DodgeD500V8ShowingThermostatOpeningAndHeaterHoseConnections.jpg) (56DodgeD500HeaterHosesAtWaterPump.jpg) Attachments ----------------  DaveFs56DodgeD500V8WithNewNOSWaterPumpAndAdditionalEngineAndFramePainting.jpg (144KB - 87 downloads) DaveFs56DodgeD500V8ShowingThermostatOpeningAndHeaterHoseConnections.jpg (176KB - 77 downloads) 56DodgeD500HeaterHosesAtWaterPump.jpg (175KB - 78 downloads) | ||
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| dels56 |
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Extreme Veteran Posts: 351  | |||
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| 56D500boy |
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Expert 5K+ Posts: 9900 Location: Lower Mainland BC | dels56 - 2022-11-15 7:03 AM Hi Dave, hot water from below the thermostat should go to the bottom inlet on the heater core. This way the air is always purged out of the heater core. Del Del: So just to confirm, you are suggesting that the hose connected to the long nipple, that leaves the orifice just behind the thermostat should go to the inlet of the heater control valve? I think I have it going to the upper nipple on the heater core, which you *MIGHT* say is completely wrong (??) Red wire? Blue wire? (I think I guessed wrong). KA BLOOEY!!  | ||
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| 56D500boy |
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Expert 5K+ Posts: 9900 Location: Lower Mainland BC | . UPDATE: Started the car (4C/39F in the garage Brrrr) this AM. Opened the heater valve to about half to encourage some flow, but not too much. Monitored the hose temps with my Thermal Laser thermometer while the engine came up to temp (or so). BOTTOMLINE: I'm an idiot. I selected the wrong hose to go to the upper nipple on the heater core, which means that I had the wrong hose attached to the curved tube on the heater valve. While the engine warmed up, I determined that the "hot" hose was going to the upper nipple of the heater core. NOW I just need to swap the hoses a) without loosing too much coolant and b) getting the clamps tightened again (but not too tight) so I don't lose coolant and freakout that my core is leaking (again). Thanks for playing. | ||
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| dels56 |
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Extreme Veteran Posts: 351 | |||
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| JedRhule |
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Veteran Posts: 101 Location: Palm Beach County Florida | |||
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| 56D500boy |
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Expert 5K+ Posts: 9900 Location: Lower Mainland BC | JedRhule - 2022-11-16 6:47 AM But you made the hood springs look beautiful Yes. I did. Thanks. (With some hints from Sven (Wizard) regarding making a spring "jack" to get the spring off the hinge (and then re-install it after painting)) http://www.forwardlook.net/forums/forums/thread-view.asp?tid=75494&... | ||
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| 56D500boy |
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Expert 5K+ Posts: 9900 Location: Lower Mainland BC | 56D500boy - 2022-11-15 11:52 AM While the engine warmed up, I determined that the "hot" hose was going to the upper nipple of the heater core. NOW I just need to swap the hoses a) without loosing too much coolant and b) getting the clamps tightened again (but not too tight) so I don't lose coolant and freakout that my core is leaking (again). Thanks for playing. Swapped the heater hoses at the heater core this afternoon. (Used needle nose Vice Grips (with the jaws wrapped with tape as the temporary hose shut off/pinch clamps). Restarted the car and monitored the hose temps with my Thermal Laser thermometer while the engine warmed up. Hot(est) hose is now going from the longer nipple by the thermostat housing to the upper (curved) tube of the heater valve, the way Sven, Del S (and God) intended. :P Opened up the heater valve all the way and enjoyed nice heat (it was 9C but sunny and dry). Bonus: The heat stayed on while I took the car for a short(ish) spin. Yippee! Too bad I didn't figure that out before. Live and learn. Too soon old. Too late smart. Edited by 56D500boy 2022-11-17 9:00 PM | ||
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