Another Temp Light/ Coolant/ heating thread
#31
You could check ECT sensor at manifold compared to a IR thermometer aimed at it, temp senors work good/last a long time but not known for exacting accuracy. Possible sensor output high.
If you still have a overheating issue after all you've changed and system is bled you may want to pull the block drain plugs and flush your block well.
......
If you still have a overheating issue after all you've changed and system is bled you may want to pull the block drain plugs and flush your block well.
......
#32
One month later update/conclusion:
Along with the perpetual pressurized overflow and random overheating, I started hearing what sounded like an exhaust leak from the passenger side that just got louder. I threw up my hands and tore it down to the shortblock, had the heads tested/refreshed, and put it all back together.
The gasket was dissolved between 4 & 6, which answered the exhaust leak sound. There was some gasket corrosion between the cylinder and water path on 7, so I have crossed my fingers and prayed that was the source of the exhaust gas in the coolant.
In the end, despite all the Co2 testing, I think the only possible answer was that there was exhaust gas in coolant. I was very atypical - no coolant loss except when the overflow happened, and a negative reading on the Co2 test. No oil in water or water in oil. Weird.
I have also done the thermostat mod (live in west central florida - so no worries with cold) , and my temps are around 188. Still seems a bit high, and it fluctuates a lot, but the pressure isn't happening and all in all things are great. I'm going to assume this saga is over.
Thanks for all of your help.
Along with the perpetual pressurized overflow and random overheating, I started hearing what sounded like an exhaust leak from the passenger side that just got louder. I threw up my hands and tore it down to the shortblock, had the heads tested/refreshed, and put it all back together.
The gasket was dissolved between 4 & 6, which answered the exhaust leak sound. There was some gasket corrosion between the cylinder and water path on 7, so I have crossed my fingers and prayed that was the source of the exhaust gas in the coolant.
In the end, despite all the Co2 testing, I think the only possible answer was that there was exhaust gas in coolant. I was very atypical - no coolant loss except when the overflow happened, and a negative reading on the Co2 test. No oil in water or water in oil. Weird.
I have also done the thermostat mod (live in west central florida - so no worries with cold) , and my temps are around 188. Still seems a bit high, and it fluctuates a lot, but the pressure isn't happening and all in all things are great. I'm going to assume this saga is over.
Thanks for all of your help.
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twilightcall
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03-04-2018 06:55 PM