A Cooling System Saga
#11
Given the temperature outside I am guessing thermostat is sticking, first open, then closed. Switch to inline, run the cap one full turn loose. Long post on that here: https://landroverforums.com/forum/di...46/#post887409
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TheLastOne (01-16-2024)
#12
Did you order a Rover thermostat, or an inline one? Kind of a waste of time ordering another Rover one.
I know that I have lost cabin heat on all three of my trucks when the coolant level gets low. This has typically happened when the reservoir cap has malfunctioned. Replacing the cap and filling the system solved the problem.
I know that I have lost cabin heat on all three of my trucks when the coolant level gets low. This has typically happened when the reservoir cap has malfunctioned. Replacing the cap and filling the system solved the problem.
I did watch an Atlantic British video about headgasket replacement, pretty involved. Did one on a 3 series BMW years ago that wasn't quite as in depth.
#13
Given the temperature outside I am guessing thermostat is sticking, first open, then closed. Switch to inline, run the cap one full turn loose. Long post on that here: https://landroverforums.com/forum/di...46/#post887409
#14
#15
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TheLastOne (01-17-2024)
#16
So, today I went out and bled her again. Air didn't seem to be a problem, but my heater still isn't producing heat. I did some research on that, and apparently you can find a clog by grabbing the hoses, and feeling if one is substantially hotter than the other. I checked that. Both were faintly warm, so I guess that's inconclusive.
I guess my next steps are replace the thermostat, then flush the heater core? I'm at a bit of a loss here. If I pull out the glove box can I squeek my hand up into there to feel the core? Then I'd know if that's getting hot water.
I guess my next steps are replace the thermostat, then flush the heater core? I'm at a bit of a loss here. If I pull out the glove box can I squeek my hand up into there to feel the core? Then I'd know if that's getting hot water.
Last edited by TheLastOne; 01-17-2024 at 12:54 PM.
#17
@TheLastOne The hoses are enough the Discovery is a constant flow system. Check that your dampers are working, but flushing the heater core will not hurt, you should be see how the flow is. You should be able to clamp the rubber hoses to stop most of the coolant loss.
#18
@TheLastOne The hoses are enough the Discovery is a constant flow system. Check that your dampers are working, but flushing the heater core will not hurt, you should be see how the flow is. You should be able to clamp the rubber hoses to stop most of the coolant loss.
#19
Suggest you get one of these.
Do you still have a thermostat element in it? If so, warm engine up to 120 or 140 or so, buzz the engine up to about 2000 rpm for 30 seconds, feel heater hoses. They should be very warm to the touch, you should not be able to hold your hand on them. Feel top radiator hose forward section, it shoudl be cold. You are doing this because with the thermostat still closed all the flow should go through the heater core. If not hot, heater core is plugged. Once engine is fully warmed up and thermostat opens top radiator hose should get warm. Because heater core is full bypass type in super cold weather with heater going full blast thermostat won't open very much at idle, you would need to be going highway speed to get it up to temperature.
Do you still have a thermostat element in it? If so, warm engine up to 120 or 140 or so, buzz the engine up to about 2000 rpm for 30 seconds, feel heater hoses. They should be very warm to the touch, you should not be able to hold your hand on them. Feel top radiator hose forward section, it shoudl be cold. You are doing this because with the thermostat still closed all the flow should go through the heater core. If not hot, heater core is plugged. Once engine is fully warmed up and thermostat opens top radiator hose should get warm. Because heater core is full bypass type in super cold weather with heater going full blast thermostat won't open very much at idle, you would need to be going highway speed to get it up to temperature.
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