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[gavlar001]

  finished up this evening under torchlight putting it back together after the stat change.Now the car heats up ok and the temp gauge is fine but still no heat in the cabin.Wheres the next place to start looking.Many thanks Gavin.

[Andy B]

air lock in the heater matrix or blocked matrix

[gavlar001]

  cool i know i can flush the matrix but how do i clear an airlock.Thanks

[Andy B]

cool i know i can flush the matrix but how do i clear an airlock.Thanks

squeezing/'burping' hoses usually help moves trapped air. did you have the heater set to 'hot' when you re-filled the system?

[gavlar001]

Yep on hi full on before i replaced the stat both heater matrix pipes were red hot.

[gavlar001]

Maybe its some sort air control thing how do the heater flaps work.when i put it on screen etc i can here the flaps moving directing the air. Before i did the stat once in the car all of a sudden heat started to blow through then it stopped

[Andy B]

Sorry out of other ideas then ..... I've not had the need to delve to far as I never had heater problems on my Omega 

[gavlar001]

Thanks anyway. I will start by checking if its an airlock.What the best way to bleed it

[Andy B]

Thanks anyway. I will start by checking if its an airlock.What the best way to bleed it

I'd run it & see if the air moves itself. IIRC the heater matrix connections are a quick click connector 

[gavlar001]

Yep will do. Thinking about it now when I was putting the plenuim back on there was this rubber tube small same size as the ones on the rear of the plenuim just dangling behind everything I will have to trace it and find out where its going. All 4 were connected on the plenuim correctly.

[Migv6 le Frog Fan]

Sounds like the vac pipe which plugs into the underside of the plenum at the front. Cant remember exactly what its for though.
When bleeding the system leave the cap of the expansion tank.

[Doctor Gollum]

Or the hbv one, which ties in with the lack of cabin heat

The one you're thinking of generally stays put unless you split the throttle body from the plenum

[gavlar001]

The throttle body vac pipe was plugged in I think this pipe was like what plugs into the back of the plenum. Been out this morning car temp reads good bleed it good with the cap off. What does the little starship enterprise hbv do I saw it when I was stripping it down and how does the vac system work to provide heat. I think someone left them connected the wrong way etc

[gavlar001]

If I can remember the front throttle body pipe was a vac pipe that was connected to a silver thing on the rear of the fuel inlet housing as I remember it running through the fuel rail inlet when I lifted it off. And the radiator heater hoses both top and bottom during the bleeding with the cap off are not even luke warm

[Andy B]

The throttle body vac pipe was plugged in I think this pipe was like what plugs into the back of the plenum. Been out this morning car temp reads good bleed it good with the cap off. What does the little starship enterprise hbv do I saw it when I was stripping it down and how does the vac system work to provide heat. I think someone left them connected the wrong way etc

There's a clue in the name  hbv  ..... heater by-pass valve