Heater Blows Cold When In Traffic

[dave030445]

hi chaps

my heater blows lovely hot air when driving. But when stopped at light or traffic, it start to get colder. but if you rev the engine it blows hot again any idea

cheers dave

[Munter]

The aux water pump gone maybe??

 

This would mean the water is only being pumped around fast enough when the engine is running faster. Slow the engine and the water slows...

[dave030445]

The aux water pump gone maybe??

 

This would mean the water is only being pumped around fast enough when the engine is running faster. Slow the engine and the water slows...

i thought i only had 1 water pump, shows what i know. Where is this aux pump some where nice and easy to get to. (i bet not)

cheers dave

[seatkid]

:( How many times do we have to say.....

 

What engine type, model, year? :huh:

 

We are not mind readers.

 

 

Probably a faulty water pump (detached plasic impeller) or a faulty thermostat (not closing fully).

[dave030445]

:( How many times do we have to say.....

 

What engine type, model, year? :huh:

 

We are not mind readers.

 

 

Probably a faulty water pump (detached plasic impeller) or a faulty thermostat (not closing fully).

thanks for your kind reply

its a 2.8v6 1997

p reg

sliver

ghia x

5 door

manual

petrol

hope that helps

Edited February 20, 2010 by dave030445

[paulhart6]

I had this on my old bmw e36. Turned out to be air in the system. I found whilst sitting in it on a cold day watching some trackday racing it was blowing cold. However if i revved it slightly say 500rpm more it started to get warmer inside. I then bled a small amount of air out of the system and all fixed. Maybe worth a shot!!!

:25: How many times do we have to say.....

 

What engine type, model, year? :huh:

 

We are not mind readers.

 

 

Probably a faulty water pump (detached plasic impeller) or a faulty thermostat (not closing fully).

thanks for your kind reply

its a 2.8v6 1997

p reg

sliver

ghia x

5 door

manual

petrol

hope that helps

[dave030445]

I had this on my old bmw e36. Turned out to be air in the system. I found whilst sitting in it on a cold day watching some trackday racing it was blowing cold. However if i revved it slightly say 500rpm more it started to get warmer inside. I then bled a small amount of air out of the system and all fixed. Maybe worth a shot!!![

 

 

thats what i thought, but i dont think there is any bleed valve on the gal. So can anybody help how to get the air out.

Edited February 20, 2010 by dave030445

[Munter]

The aux water pump gone maybe??

 

This would mean the water is only being pumped around fast enough when the engine is running faster. Slow the engine and the water slows...

i thought i only had 1 water pump, shows what i know. Where is this aux pump some where nice and easy to get to. (i bet not)

cheers dave

 

ahh scratch that then i assumed you had the TDi!!

[seatkid]

thats what i thought, but i dont think there is any bleed valve on the gal. So can anybody help how to get the air out.

Crack open the pipes out of the top of the front heater matrix. Located to the left of the wiper motor.

[mk2vr6]

The aux water pump gone maybe??

 

This would mean the water is only being pumped around fast enough when the engine is running faster. Slow the engine and the water slows...

i thought i only had 1 water pump, shows what i know. Where is this aux pump some where nice and easy to get to. (i bet not)

cheers dave

 

 

aux water pump? coolant run on pump, located in the pipe work on the block to the rear of the coil pack, its in the return pipe work from the heater

[dave030445]

[so its not the main water pump thats gone. so can i live without this

[mk2vr6]

not saying your main pump hasnt failed! first of replace the stat, cheap and fairly easy job then go from there, you can also check the operation of the after run pump to see if its still working? as you say the heater kicks out more heat when the engine is revving from that I would say that the main pump is the prime suspect!

does the rear heater still kick out plenty of heat? at low revs?

Edited February 21, 2010 by mk2vr6

[dave030445]

not saying your main pump hasnt failed! first of replace the stat, cheap and fairly easy job then go from there, you can also check the operation of the after run pump to see if its still working? as you say the heater kicks out more heat when the engine is revving from that I would say that the main pump is the prime suspect!

does the rear heater still kick out plenty of heat? at low revs?

thanks its not got rear heating.

[mk2vr6]

what not fitted or not kicking out heat?

[dave030445]

what not fitted or not kicking out heat?

not fitted

[mk2vr6]

why not? your sure on that? I understood it to be standard on ghia x's my 95 glx had it

[seatkid]

I thought all Shalaxys had rear heaters of some type. Just some didnt have booster/aux units.

[mk2vr6]

I thought all Shalaxys had rear heaters of some type. Just some didnt have booster/aux units.

 

not all, the lower spec aspens didnt all have and it was an option on some others in the range to start with but a 97 ghia x? I would have expected it to be standard fit on such a higher specced model?

Edited February 22, 2010 by mk2vr6

[dave030445]

dolnt think i have how can i be sure.

[mk2vr6]

there will be vents floor level in the passenger rear quarter panel, two rotary controls on the head lineing above the C post passenger side and a push button on the center consule near the heater controls that has an out line of the Galaxy on it with heat haze!

[dave030445]

um think i would of noticed that, so no i havent got rear heating.