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[sjc]

Maybe your HBV (heater bypass valve) is jammed in bypass mode or the vacuum solenoid for it is not isolating it properly.

Try pulling the vacuum hose off the top of the HBV.

Alternatively, reverse the hoses on the side with the 2 stubs as a test.

Doesn't explain the fan behaviour though, could be that the impeller has came off the water pump (the mechanical one in the engine).

If you remove the small water pipe from the left, sorry, right of the throttle body, does water come out of it when you run the engine?

[Kevin Wood]

The only time the aux. coolant pump on the radiator should have power is when the engine is shut down and the temperature is hot enough for the stage 1 fans to be on. It will make no difference to cooling when the engine is running because it can't run when the engine is running!

It is there only to prevent after-boiling.

Kevin

[gstylebaby]

Maybe your HBV (heater bypass valve) is jammed in bypass mode or the vacuum solenoid for it is not isolating it properly.

Try pulling the vacuum hose off the top of the HBV.

Alternatively, reverse the hoses on the side with the 2 stubs as a test.

Doesn't explain the fan behaviour though, could be that the impeller has came off the water pump (the mechanical one in the engine).

If you remove the small water pipe from the left, sorry, right of the throttle body, does water come out of it when you run the engine?

I have tryed the vac pipe on the H.b.v and it made no difference and was told thats all o.k...Not sure what you mean about the stub end pipes do you mean the two pipes that go to the h.b.v from the heater matrix or do you mean swap at the heater matrix end.  Have not taken the pipe on the throttle body off but when you run the car and you rev it you can see water coming in the header tank from that pipe so that would say to me that its o.k.

[sjc]

I meant swap the 2 pipes that are on the same side of the HBV leaving the single one that goes to the coolant bridge alone.
Certainly sounds like the water pump is ok if you're seeing ciculation at the header tank.

[sjc]

BTW, you can also use a coupler to connect the hose from the coolant bridge directly to the heater matrix hose and bin the HBV altogether - i've heard of a few people doing that and they say the air-con still works fine.  Of course, you need to block off the other hose and the vacuum hose - you can get copper cap-off bits from any plumbers merchant.

[gstylebaby]

I meant swap the 2 pipes that are on the same side of the HBV leaving the single one that goes to the coolant bridge alone.
Certainly sounds like the water pump is ok if you're seeing ciculation at the header tank.

I will have a go at this when i'm off work...Thanks for the idea oh and i know this sounds daft i take it i'm hopeing to get heat in the car and if i dont that the h.b.v is o.k ??

[gstylebaby]

The only time the aux. coolant pump on the radiator should have power is when the engine is shut down and the temperature is hot enough for the stage 1 fans to be on. It will make no difference to cooling when the engine is running because it can't run when the engine is running!

It is there only to prevent after-boiling.

Kevin

Thanks kevin i now know what it does.

[sjc]

I meant swap the 2 pipes that are on the same side of the HBV leaving the single one that goes to the coolant bridge alone.
Certainly sounds like the water pump is ok if you're seeing ciculation at the header tank.

I will have a go at this when i'm off work...Thanks for the idea oh and i know this sounds daft i take it i'm hopeing to get heat in the car and if i dont that the h.b.v is o.k ??

Yeah, if you get heat then the HBV would seem to be stuck in bypass mode.

Before you do any of that, and if you haven't already, can you try setting the temp to "HI" on the climate control and see if you get heat then.  This was suggested on another similar thread (seems to be a few folk with this problem just now).  If you get heat on "HI" it could just be that the sampling fan in the dash has packed in.  Wouldn't that be a bummer if it was as simple as that?!

[gstylebaby]

I meant swap the 2 pipes that are on the same side of the HBV leaving the single one that goes to the coolant bridge alone.
Certainly sounds like the water pump is ok if you're seeing ciculation at the header tank.

I will have a go at this when i'm off work...Thanks for the idea oh and i know this sounds daft i take it i'm hopeing to get heat in the car and if i dont that the h.b.v is o.k ??

Yeah, if you get heat then the HBV would seem to be stuck in bypass mode.

Before you do any of that, and if you haven't already, can you try setting the temp to "HI" on the climate control and see if you get heat then.  This was suggested on another similar thread (seems to be a few folk with this problem just now).  If you get heat on "HI" it could just be that the sampling fan in the dash has packed in.  Wouldn't that be a bummer if it was as simple as that?!

I dont have climate control mate.....

[gstylebaby]

Mines one of the first omegas so i have 1.2.3..4 on the heaters. Wish it was that simple mate.

[sjc]

Mines one of the first omegas so i have 1.2.3..4 on the heaters. Wish it was that simple mate.

Ah,ok.  Ignore that then.

I take it you've tried opening all the air vents to check it's not just that the direction selector is goosed - it's vacuum driven on the non climate models.