No. Did you look at the linked photo?

No. Did you look at the linked photo?

 

My bad, it's only the rad and expansion tank which are shut off, the matrix is permanently in circuit.

My bad, it's only the rad and expansion tank which are shut off, the matrix is permanently in circuit.

Glad you saw it i was about to take a pic of a new stat housing to show that..

Ok, so we finally agree that the heater matrix is always getting coolant flow, whether the thermostat is opened or closed. Is there any plausible explanation why it was blowing cold air when the engine was boiling ? Is there any possible way to test if the pump works as it should be without taking it apart ?

Edited 10 March, 201610 yr by Alexandru

Ok, so we finally agree that the heater matrix is always getting coolant flow, whether the thermostat is opened or closed. Is there any plausible explanation why it was blowing cold air when the engine was boiling ? Is there any possible way to test if the pump works as it should be without taking it apart ?

 

Heater matrix will go cold if the coolant is blown out of the system and the level drops too low, matrix is at the highest point in the system so fills with air first.

Ok well if you run the engine with the pressure cap off you should get flow through the small pipe into the expansion tank once it has warmed up.

It possibility air locked the heater once it started to boil but its looking like waterpump failure

Can I check it ? It's not expensive as a part, but still...as far as my mechanic told me, if it is not leaking, it's in good shape. Can it be a third situation ?

I thought everything was OK since the new thermostat went in?

It is perfect. I'm driving it daily, in all kind of traffic situations and on mostly all it's rpms. I was just being curious why it was blowing cold air and I'm getting concerned about the pump's health, that's all.

Edited 10 March, 201610 yr by Alexandru

It's a fairly easy job to stick a new pump on if you're worried.

Then you are worrying over nothing. .

If its ok then its ok.

It probably just that when it boiled up it airlocked the heater. If its fine now then its fine. The water pump wont fix itself once broken

I can still hear water bubbling around the heater matrix after leaving the car parked over the night. It stops after about one mile or so.

Funny thing: after turning off the engine(after driving a few hours) I can hear a sound coming from the heater matrix (through the central vents) like it's depressurising or something.

What is wrong with it? It has a mind on it's own!

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Edited 13 March, 201610 yr by Alexandru

I can still hear water bubbling around the heater matrix after leaving the car parked over the night. It stops after about one mile or so.

Funny thing: after turning off the engine(after driving a few hours) I can hear a sound coming from the heater matrix (through the central vents) like it's depressurising or something.

What is wrong with it? It has a mind on it's own!

Sent from my iPhone using Tapatalk

 

Yours has A/C doesn't it? Maybe the noise is from that?

A/C is usually turned off.

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Edited 13 March, 201610 yr by Alexandru

Ac is never off on these its always circulating some refrigerant and sounds like yours may be low

Ac is never off on these its always circulating some refrigerant and sounds like yours may be low

 

That's what I was thinking. Probably needs regassing.