Hi Guys,

Hopefully someone can point me in the right direction, my 06 WRX has started to have issues with the running temp, it literally goes off the scale (hot) and after a while it drops only to spike again, originally I thought it was a leaking hose however thats def not the case I am now thinking its either water pump or thermostat? any ideas and advice would be awesome

 

Hg

 

I'm having the same issue.
I've also got a tiny spray of water coming out the top of the radiator sometimes. Likely to be radiator I guess but possibly something else at fault causing pressure build up?
As soon as I switch engine off it cools down immediately according to the temp guage.

 

a radiator doesn't just leak some of the time, if it's leaking it needs replacing or you will eventually run low on coolant and have it boil up, which could potentially damage the engine.
Trev

 

I would guess the thermostat. I wouldn't risk it being the gauge playing up.
I wouldn't drive it far until you get to the bottom of it.
Trev

 

My money on zHG too

 

It's booked in to garage tomorrow morning and I'll have my breakdown take it there because the temp guage keeps spiking.
My question was more is it the obvious, radiator, or is something else going on.

 

Last port of call would be this stuff

Works on water leaks HG,S ???

http://www.kseal.com/uk/

 

I don't think its the HG I cannot see any symptoms of it oil is good and black no milkshake radiator water is showing no signs of oil mixing with it and coolant levels are holding and not dropping

I think I will swap out the thermostat its an old car so I would assume its never been changed

 

Hi oil and water doesn't necessarily have to mix as a sign of hg failure there could be a small leak pressurising the system hope it's an away fix and you have a competent mechanic

 

Thermostat would be first port of call.

 

100% not this^^^^
Cr@p

This^^^^

 

Will order one today, any recommendations? Car is hopefully going on track in Sept so really want to get this fixed

Also, another thing I may not of mentioned - the fans never seem to come on, have checked the fuses and they are all ok and the fans spin easily enough

 

Buy a genuine one, not a cheap knock off copy.

 

Fans should kick in at 95* make sure the 2 connecting blocks at the bottom are clicked in properly.
If thermostat doesn't sort it then I would be looking at the temp gauge sensor,there are 2 sensors,one for ECU and one for gauge so make sure you get the correct one if you go down that route.
If you have a data cable you could check to see if it is a faulty sender.

ps: fill the system the correct way to avoid airlock.

 

Single sensor on a newage............

 

+1

 

point 1. It's either hg or an airlock.

point 2. If the thermostat fails, it fails open. It does NOT cause pressure spikes. The engine just doesn't get hot.

Trust me guys.

 

Ok, so mine was radiator.

 

As yours had a leak on the radiator then this shouldn't have been a surprise really.

 

It wasn't a surprise.
I was releived it wasn't HG though or something else aswell.

 

You are all correct its the HG... cannot find anyone who wants to do the work either! Absolute nightmare

 

Atleast you got decent fitters that are honest and not bum mechanics
I'd get it recovered to a reputable Subaru garage where the work will be guaranteed Pal do it right do it once or you'll fall into a deep money ditch all the best

 

Are there any good ones in the south?

 

Put a post up with your postcode mate and problem I'm sure there's a lot of competent mechanics down south and a lot of enthusiasts they will steer you in the right direction keep us updated

 

I am in Wareham Dorset, BH20

 

Engine Tuner at Plymouth?

 

Gutted for you mate

Make sure whoever does the job skims heads and replaces bearings as a minimum requirement, been there done that

 

The only place I would be considering....

 

How did you find out it was head gasket?