Next time stone cold remove bleed screw and use a small funnel to top off coolant through the T. Most of air in system ends up there. Won't take a lot but you are replacing the air with coolant. Works for me and may for you. Seemed to have worked for another member as well.
https://landroverforums.com/forum/di...elcomed-77196/
......

 

I'll try that in the morning-

Up till now I have been doing it cold and proper over and over again- but I've gotten desperate lately.

I testing for maybe 10 minutes, and no exhaust gasses! I was a little surprised- exhaust gasses made a lot of sense. Just to double check- run the car as normal, just the tester on the resolvoir, right?

-rj

 

now that you have you little invention,
raise the recovery tank as high as you can get it,
and just keep filling it gravity should push the air to the tee eventually.

 

I was running late so no bleeding this morning. Temps were fine for the 45 minutes of driving I did.

When I got home, I took off the fan cover and felt the radiator. Hot at the top drivers side quadrant, cool elsewhere. Bottom left hose is cool, top hose is uncomfortably hot. Waterfall got somehow more pronouced as the morning drive went on. Bad radiator? Thermostat?

Current theories:

X Blown gasket/exhaust gas in coolant - gas check negative, no codes, no smoke, no coolant loss.

Clogged radiator

bad thermostat

magic air bubble fairly

terrible karma

bad water pump (just changed with new Airtex)



This is starting to be maddening...

-rj

 

wsnh.
......

 

Just to keep the story going for posterity:

Last night it tried to overheat on a 5 minute/ 3 mile drive home. It had been sitting for 90 minutes before hadn, so it wasn't warn to begin with.

Watching the temp on the obd guage the whole time - it never went down. Either the thermostat didnt open, the radiator was clogged, or the water wasn't moving. (That's the only things I can come up with)

The low temp thermostat came in the mail today, and I changed it and went around the block. No difference - still going straight to hot, do not pass go. No thermostat dip.

im blaming the Radiator- who's with me?

 

Remind me of the way you tested for exhaust gases in the coolant? Cos that's still my hunch.

 

Based on your location (florida) and your issue (hot engine), I'm going to suggest you look hard at the inline thermostat mod.

I did my first one when I lived in atlanta, and it solved all my cooling problems.

I have another rover now, and live in Scottsdale AZ (120+ in the summer) and the inline thermostat handles it beautifully.

I use a 180 degree stat with the jiggle pin, and sometimes throw in a 170 degree for the scorching months and/or off-roading. Makes bleeding a snap as well with that silly 3-way rover t-stat in the trash where it belongs.

 

yes did you test for CO2?

 

Update-

I have done the C02 test, over and over again. I've almost emptied the brand new bottle of test fluid. (Its the tube that sucks some radiator/tank air in, turns from blue to yellow.

I replaced the radiator and replaced the thermostat AGAIN with a low temp one. At this point, I can barely make it a miles before I start getting nervous and turn around.

I put in another water pump last night, thinking that it all went south with the water pump replacement (old one had a small leak, but aside from low coolant from leak had no issues with overheating).

Preliminary test seems to point to the temps being stable, althouh reporting as higher than before with OBD (~102 C). This is odd becuase of the lower temp thermostat and brand new radiator should do SOMETHING-