I am experiencing an issue where my coolant temps creep towards the red line if I am idling in gear on a hot day with AC on, usually in direct sunlight. Usually this only happens after I have been driving for at least 30 minutes. When this happens, I usually put the vehicle in park, and rev the engine to ~2k rpm to blow the fan clutch until it cools down. I have gone in the engine bay and measured temps via laser gun, and it seems to agree with my temp gauge. I have performed a HG test- I removed a couple inches of coolant, drove the car until it got hot, let the gauge creep up, then tested. No color change. I am not experiencing loss of coolant either.
The following were replaced in 2020, all brand new OE Toyota where not specified:
The heating issue started happening towards the end of 2021, and now it is very prominant.
A few weeks ago I attempted to fix it by replacing/performing (to no effect):
At this point I am suspecting my OE thermostat is not opening fully. Either that or something funky is going on with my fan clutch.
I can hear my fan clutch when I rev the engine but it does not sound as strong as my 60's fan clutch. Not sure if that's because the 80 is more insulated or not... I did notice when I removed the water pump that the inside was a matte charcoal color. Will try to take a picture and upload.
My question to the gurus: is there anything else I could be missing? At this point I'm curious if there's something else going on, like similar to how a car runs hot when the valve timing is retarded.
I feel like I also have a loss of power, but I'm not completely sure.
The following were replaced in 2020, all brand new OE Toyota where not specified:
- Thermostat & gasket
- All coolant hoses
- Aisin blue hub, valve set earlier, drained and filled with 45-60ml 15k oil
- Temp gauge modified with resistor mod
- EGR bypassed/blocked
- rear heater delete
- Radiator cap
The heating issue started happening towards the end of 2021, and now it is very prominant.
A few weeks ago I attempted to fix it by replacing/performing (to no effect):
- Radiator (TYC brand) & cap, old was CSF brass unit
- Coolant flush with 30 gallons of water and prestone flush
- Aisin Water pump
- Fan shroud (used OE, uncracked)
At this point I am suspecting my OE thermostat is not opening fully. Either that or something funky is going on with my fan clutch.
I can hear my fan clutch when I rev the engine but it does not sound as strong as my 60's fan clutch. Not sure if that's because the 80 is more insulated or not... I did notice when I removed the water pump that the inside was a matte charcoal color. Will try to take a picture and upload.
My question to the gurus: is there anything else I could be missing? At this point I'm curious if there's something else going on, like similar to how a car runs hot when the valve timing is retarded.
I feel like I also have a loss of power, but I'm not completely sure.