Have I got an airlock in the coolant?

[jonnycraig]

Hey guys, I recently had my radiator replaced (about 3 weeks ago) and noticed on a few occasions that there was no hot air blowing inside the cabin, over the past 2 days it still blows cold even after a 30 mile journey. The radiator is warm/hot as expected but the coolant in the expansion bottle is only lukewarm, with no pressure when top taken off?

Cheers

 

[GISXER711]

have you try leaving cap off expansion tank , run engine with heater on hot and fan flat out , get engine up to running temp with water ready to poor in if needed , give water pipes a squees now and then , this will work if all being well

 

[Broken Byzan]

you will need to release the heater pipe from the matrix inside the skuttle. This will reveal the bleed hole. Run the engine until fluid is flowing from the uncovered hole and then refit.

Job done. They are notorious for not self bleeding