Jim 88 XJ
NAXJA Forum User
- Location
- Friendswood, Texas
I did a search before writing this up, if there is a good link on this just let me know.
Yesterday my vacuum actuated valve for the heater core broke, the one with the three way splitter 6 inches from the plastic fill bottle. Truck got hot fast, pulled into my friends house 5 inutes away, steaming but not in the red zone on the gauge. Vatozone did not have the three way valve with the swedged fittings as I expected so I jigged up a hose to bypass the heater core. Now the hose from the head goes straight to the plastic bottle. I also plugged the upper heater core hose. I filled it with water, maybe less the 1/2 gallon and stopped as it filled up the bottle. I "did not burp the system" since I was only 7 miles from home. Drove home at 35 mph and the engine never got over 150 degrees. Outside temp today is 65 degrees. The bottle level was normal when I got home, truck was running fine.
First, I thought if you do not "burp" the closed loop system it would run hot.
I also have a thermostat that fails open, PO put it in.
Any ideas why it would never get above 150 degrees.
BTW, the truck runs great, gets good mileage and normally runs at a consistant 200 degrees. The only thing different is the change in the hose config above.
I do intend to rig up the three way again so I have heat, I am thinking that maybe something else happen causing the vacuum fitting hose to break.
Or maybe it's as simple as, burp and be done. Any ideas?
Yesterday my vacuum actuated valve for the heater core broke, the one with the three way splitter 6 inches from the plastic fill bottle. Truck got hot fast, pulled into my friends house 5 inutes away, steaming but not in the red zone on the gauge. Vatozone did not have the three way valve with the swedged fittings as I expected so I jigged up a hose to bypass the heater core. Now the hose from the head goes straight to the plastic bottle. I also plugged the upper heater core hose. I filled it with water, maybe less the 1/2 gallon and stopped as it filled up the bottle. I "did not burp the system" since I was only 7 miles from home. Drove home at 35 mph and the engine never got over 150 degrees. Outside temp today is 65 degrees. The bottle level was normal when I got home, truck was running fine.
First, I thought if you do not "burp" the closed loop system it would run hot.
I also have a thermostat that fails open, PO put it in.
Any ideas why it would never get above 150 degrees.
BTW, the truck runs great, gets good mileage and normally runs at a consistant 200 degrees. The only thing different is the change in the hose config above.
I do intend to rig up the three way again so I have heat, I am thinking that maybe something else happen causing the vacuum fitting hose to break.
Or maybe it's as simple as, burp and be done. Any ideas?