Is my coolant system bled? No heat at idle

[Rod the mod]

i had a swine of a time bleeding mine, had to swap the heater hoses round to get rid of the air in the matrix, scared to swap them back now

 

[strygr]

i had a swine of a time bleeding mine, had to swap the heater hoses round to get rid of the air in the matrix, scared to swap them back now

Which hoses did you swap out?

 

[Rod the mod]

the two heater hoses that enter the bulkhead, just put the top one on the bottom and vice versa

 

[Andyboy]

So you've had the heater hose off and filled it with coolant?

 

[Pingu]

I think he means that he swapped the entry and exit hoses for the matrix. The entry became the exit and the exit became the entry.

 

[t-tony]

Exit needs to be at the top because heat rises.

Tony.

 

[strygr]

Exit needs to be at the top because heat rises.

Tony.

You guys are messing around, right?

 

[t-tony]

No, law of physics says heat, rises so that’s how hot water circulates. Goes in at the bottom and comes out at the top.

Tony.

 

[Delk]

While cleaning out bits out of the engine bay on mine today I found what looks to be the additional heater pump.

 

[Pingu]

While cleaning out bits out of the engine bay on mine today I found what looks to be the additional heater pump.

View attachment 166369

That's the water valve. It could be something to do with your problem, as it is operated by the heater knob (as I described earlier). It opens when the heater knob is set above FULLY COLD. It's purpose is to ensure that hot water is passed through the matrix when required, and that the matrix is allowed to cool when set to FULLY COLD.

See page 248 (6410.7-01) of this (http://www.porterbility.co.uk/Files/PDF/e36z3_98_AG.pdf)