63glacierblu
New LVC Member
Hi, everyone,
Long-time listener, first-time caller. I just registered for the forum, but I've been relying on your expertise for years, so first of all, thank you! You've helped me keep two Marks out of the shop and on the road since 2014.
I've got a mysterious overheating issue that I need help with. Forgive me if it's already covered elsewhere in the forum--I've been looking for a while but can't seem to find what I'm looking for.
The details and symptoms:
-November, 2021 I lost a VRCM (mechanic mistakenly diagnosed it as a bad PCM, but that's beside the point). I needed to get home and was far away, so I hotwired the fuel pump. Drove fine, but I got caught in a bit of traffic and it briefly overheated.
-I replaced the VRCM and ever since then, the engine runs hot. Not overheating, but hot. Twice now, during long drives, the water pump has suffered a catastrophic leakage at the weep hole.
-Things I've done/replaced:
Water pump (twice), thermostat (twice), radiator flush (nothing too concerning came out), exhaust gas test on coolant (negative). Mechanic also did a pressure test and said it held fine for a couple hours.
My question is mostly concerning what proper temp readings should be at various places. After flushing and filling yesterday, I was getting it up to temp to open up the thermostat and burp it. After about 20 minutes, the temp at the passenger side (top) rad hose was about 190 or so. The driver side hose from the crossover to thermostat housing only read about 140 near the bottom at the housing. The hose from the thermostat to the bottom of the rad was only 108 or so, so obviously it hadn't opened yet.
Are those readings normal, or close to normal? Am I way off in thinking that water is not flowing properly, otherwise the driver's side rad hose should be warmer than that after 20 minutes, thus opening up the thermostat?
I do what I can but am no expert. Any help you can provide would be greatly appreciated. Thanks in advance!
Long-time listener, first-time caller. I just registered for the forum, but I've been relying on your expertise for years, so first of all, thank you! You've helped me keep two Marks out of the shop and on the road since 2014.
I've got a mysterious overheating issue that I need help with. Forgive me if it's already covered elsewhere in the forum--I've been looking for a while but can't seem to find what I'm looking for.
The details and symptoms:
-November, 2021 I lost a VRCM (mechanic mistakenly diagnosed it as a bad PCM, but that's beside the point). I needed to get home and was far away, so I hotwired the fuel pump. Drove fine, but I got caught in a bit of traffic and it briefly overheated.
-I replaced the VRCM and ever since then, the engine runs hot. Not overheating, but hot. Twice now, during long drives, the water pump has suffered a catastrophic leakage at the weep hole.
-Things I've done/replaced:
Water pump (twice), thermostat (twice), radiator flush (nothing too concerning came out), exhaust gas test on coolant (negative). Mechanic also did a pressure test and said it held fine for a couple hours.
My question is mostly concerning what proper temp readings should be at various places. After flushing and filling yesterday, I was getting it up to temp to open up the thermostat and burp it. After about 20 minutes, the temp at the passenger side (top) rad hose was about 190 or so. The driver side hose from the crossover to thermostat housing only read about 140 near the bottom at the housing. The hose from the thermostat to the bottom of the rad was only 108 or so, so obviously it hadn't opened yet.
Are those readings normal, or close to normal? Am I way off in thinking that water is not flowing properly, otherwise the driver's side rad hose should be warmer than that after 20 minutes, thus opening up the thermostat?
I do what I can but am no expert. Any help you can provide would be greatly appreciated. Thanks in advance!