Hello all,
I have read countless threads that I have searched here, regarding heating issues in these 60's. My '84 has it's original 2F and rear heat. It'll blow warm air, but won't be enough once the weather really gets cold. At first I thought that my temperature gauge was broken. Climbing a fairly long, very steep grade coming up from Sedona, into Flagstaff I saw that the temp gauge needle came up a bit. But, it mostly stays aligned with the bottom line on the gauge. I've flushed both heater cores (entire cooling system, actually), replaced the thermostat and BOTH gaskets (all from NAPA), replaced all coolant, and "burped" the system! I also verified that the heater valve on the firewall above the heater core was properly opening and closing! I parked on a hill to get the nose high, tapped on the radiator, rocked the truck, repeatedly squeezed the upper radiator hose and even jacked the front end way up with my hi-lift jack, while the truck was chocked in my driveway. Tried all of the tricks that I have read here on the forum. After running for 20 minutes or so, I was able to stick my fingers into the coolant in the radiator. Its warm, but honestly not much more than 100°, comparing to my hot tub water. I know that it was considerably cooler than my 134° tap water at my house (have since turned down my water heater!). Its just not getting up to temperature, and I cannot wrap my head around why. I sure wish that my '68 GMC with a big block, or my '59 Chevy Apache with a 383 had the same problem! But, I want this rig to run properly and I just don't know what's up.
I would be inclined to say that my upper thermostat gasket was installed correctly, but perhaps some user error is afoot. But, it behaved the same with the old thermostat, too.
There are so many heater hoses running all around the engine compartment, and back to the rear heater, I feel as though improper heater hose routing is at fault here! Between the oil cooler/heat exchanger, both heater cores and all associated hoses, it's hard to even track where the flow of coolant should be going!
Both heater cores are fed, then their returns "T" into another line. It just seems so complicated, that I feel like just enough water is always circulating, that the engine never gets up to full operating temperature.
With so many heat related threads always coming up here, is there something basic that I am missing, or that jumps out at you Land Cruiser pros?
Any help would be greatly appreciated!
Nik
I have read countless threads that I have searched here, regarding heating issues in these 60's. My '84 has it's original 2F and rear heat. It'll blow warm air, but won't be enough once the weather really gets cold. At first I thought that my temperature gauge was broken. Climbing a fairly long, very steep grade coming up from Sedona, into Flagstaff I saw that the temp gauge needle came up a bit. But, it mostly stays aligned with the bottom line on the gauge. I've flushed both heater cores (entire cooling system, actually), replaced the thermostat and BOTH gaskets (all from NAPA), replaced all coolant, and "burped" the system! I also verified that the heater valve on the firewall above the heater core was properly opening and closing! I parked on a hill to get the nose high, tapped on the radiator, rocked the truck, repeatedly squeezed the upper radiator hose and even jacked the front end way up with my hi-lift jack, while the truck was chocked in my driveway. Tried all of the tricks that I have read here on the forum. After running for 20 minutes or so, I was able to stick my fingers into the coolant in the radiator. Its warm, but honestly not much more than 100°, comparing to my hot tub water. I know that it was considerably cooler than my 134° tap water at my house (have since turned down my water heater!). Its just not getting up to temperature, and I cannot wrap my head around why. I sure wish that my '68 GMC with a big block, or my '59 Chevy Apache with a 383 had the same problem! But, I want this rig to run properly and I just don't know what's up.
I would be inclined to say that my upper thermostat gasket was installed correctly, but perhaps some user error is afoot. But, it behaved the same with the old thermostat, too.
There are so many heater hoses running all around the engine compartment, and back to the rear heater, I feel as though improper heater hose routing is at fault here! Between the oil cooler/heat exchanger, both heater cores and all associated hoses, it's hard to even track where the flow of coolant should be going!
Both heater cores are fed, then their returns "T" into another line. It just seems so complicated, that I feel like just enough water is always circulating, that the engine never gets up to full operating temperature.
With so many heat related threads always coming up here, is there something basic that I am missing, or that jumps out at you Land Cruiser pros?
Any help would be greatly appreciated!
Nik
