I have a 2003 land rover dis 2. It has been blowing cold air. I checked for leaks and check see if the oil was milky..So far no leaks. I change the cap and thermostat. I replace the coolant bootle too because it had a small leak. The car will warm up to normal temp but no heat. when you drive it will blow out hot air then it will turn cold.Then the car will start to run a little hot. Any ideas

 

It is still airlocked in the cooling system, i.e. there is still air in the system and you'll need to bleed it all out. Unclip and raise the reservoir up high (18 inches) and top up the coolant as you go. This should force out more air. Run the engine without the reservoir cap for 2-5 minutes then cut it and top up the coolant again.

It's a common problem on most vehicles after draining down the system.

 

bleeding the system, with pics

https://landroverforums.com/forum/di...9-180-a-68428/

 

I took it to the shop to check for leaks, coolant flush and filled up it run nice about 10 miles down the began to run hot and and blow cold air. don't no what else to do. I watch the shop who the land rover up to the and put coolant in and while the other house was suck coolant out. did that for 45 mins and seem to be no bubbles.

 

This is the only way I ever bleed the cooling system:

1) Make sure engine is cold, and truck is parked on a good but not extreme incline. (Jack up the front about 18in if you don't have an abundance of snowbanks where you are )

2) Raise reservoir as high as possible and hold in place with 2-3 rubber tie-down straps, Remove cap

3) Fill the reservoir to the brim, and let it sit for an hour or two. If the coolant level in the reservoir drops top it off again.

4) When you can't add anymore coolant, open the bleed screw on the upper radiator hose and let it flow until there is a good stream of coolant, and let it keep going until the reservoir is down to the fill line.

5) Install cap, Unhook reservoir and put back in place

I won't guarantee this but it's what has worked the best for me.