Hello all I am struggling with a possible new coolant leak. 1st some background,

• I bypassed the throttle body heater as it was heater as the gasket was leaking and having no indoors garage I do not have a nice dry place to work. No issues were noted after this issue
• The bleeder screw cracked resulting in in the nice duct tape fix below - 80 km from home, at midnight loads of fun. But no coolant loss the entire trip home normal temps for my Disco 188 to 190
• Stripped the duct tape off inspected the screw, cracked just under the head and picked up 3 that were the same from BMW's at a wrecker.
• Installed the new screw and brought the Disco up to temp no issues no leakage noted
• Drove about 200 km temps were solid
• Checked the coolant the morning and I as was down about .75 to 1 inch

I had no prior issues the Disco is running normally no code and no temperature issues. My suspicion is that given it was midnight and I just topped up the coolant tank there was still air in the system, driving the long distance cleared most of it hence the apparent coolant loss. However with aluminium engines always better safe than sorry, any insight suggestions of any thing else to check ? I can not see any obvious signs of coolant loss nor smell of anti freeze.

• 
  Duct tape for the win

 

Just keep checking the level, watch for bubbles, and monitor temps.

 

I do pre-flight checks on my LR's (any of my vehicles actually as it's just habit). I think of an older LR like an old DC-3. Sure when parked they seep, but with the fluids topped off properly, and once up to operating temp it's all good to go.

 

Yeah, just keep an eye on it...forever...or longer if necessary. Probably just working the air out of the system.

Open the hoods on ours once a week, or more if warrented.

​​​​​​​ Brian.

 

Took her out for an hour drive checked the level's a couple of times seems stable, I will know better in the AM.

I check my oil and coolant at least once a week

 

Agree with The Deputy. Could be purging air, monitor.

 

With the cracked bleeder screw, the engine on cool down would probably suck air into the system, now that you fixed it, should be good after a few hot/cold cycles.

 

If no pressure builds in the system it wont leak out the screw.

 

Thanks for all the replies helps with my OCD After a good 1.5 hour drive combined hi-way and a bit of off road and some twisty up hills as well as exercising the transfer case no issues. Checked this Am and Coolant level is solid no movement at all in the level. Engine temps ran as per normal 188 -190 up to 197 on long idles. Checked for leaks several times as noted above and no problems or evidence of leaks.

Once again thanks all for your replies, my wife swears I worried more about this truck than I worried about our house in 100km winds all our very high (70 to 100'), close to the house cedar trees dancing around