![]() I think rear heater delete requires hoses to beįlow is down and out from the radiator to the thermostat via the 1.5 inch hose(Cold). The coolant path shown above doesn't seem like it would offer the excess cooling I'm experiencing. I'm worried I'm operating under the desired temperature in these instances. In colder weather, or even light driving, the thermostat doesn't seem to open, and my temp gauge floats around at lower levels like the engine has more cooling available than it needs. In those instances, the temp needle is rock solid in the middle of the gauge. ![]() Furthermore, I've even gotten it hot enough that the front radiator fan comes on. Under extreme conditions, the thermostat does open and the main radiator line does get hot. I've put 8000 miles on the van in this configuration. Also, when I do open my front heater valve, I do get hot air out of the vents that is decent but doesn't burn me out. I can put my hands on those lines (including the bottle) and confirm they are hot. The above coolant path in orange is the only place I can see that the coolant could be circulating. Confirmed that my heater core valve is working (core gets cool when driving, no unwanted hot air). Added a new thermostat that was also tested beforehand.Ģ. Removed current thermostat and confirmed it was working using boiling water. Here's what I've done so far to troubleshoot.ġ. Note that I can put my hand on the main radiator line exiting the block under most circumstances and it is cold. When I close the front heater core valve, here is the only coolant flow I think it happening. Temps drift way down when idling and my temperature gauge only gets to middle under the most extreme conditions. My issue is that the main thermostat rarely opens at all but the system runs cool, almost as if there is no thermostat present at all. Note that it has the thermostat bypass sandwich that sends hot coolant from out of the block to the overflow bottle and to the front heater core if the valve is open. Here is the my map of the coolant system as it stands today (I deleted the rear heater). Professionally converted before my tenure. 1983.5 Westy with 1990 EJ22, KEP kit, and a RMW reverse manifold kit. ![]() I'm struggling with a coolant flow issue, one that the van came with. View original topic: Coolant Flow Mystery (Subaru EJ22, KEP, Reverse Manifold) :: View topic - Coolant Flow Mystery (Subaru EJ22, KEP, Reverse Manifold) Forumsįorum Index -> Vanagon -> Coolant Flow Mystery (Subaru EJ22, KEP, Reverse Manifold) ![]()
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