Overheating problem AGAIN

AndyC

AndyC

Well-known member
ISDC Club Member
My type R picked a great time to let me down yestersay...on the way to a wedding!

I popped the bonnet and saw that the bottom rad hose had just slipped off the radiator. I hadnt burst or split, just slipped off. So I limped to a nearby friends house and parked it there over night.

I went back to the car this morning and filled it up with new coolant thinking everything will be grand after that but the temperature on my Power FC went up to 120 degrees. I have a Zerosports thermostat which is suppossed to open at 80 degrees. I checked the thermostat in a kettle of hot water and is does open. The fan kicks in but the temp just keeps rising. The new coolant started to boil then.

So, now what? Is it the water pump?
 
Hey Andy i have had a couple of similar moment's this year
and every time there's has been a tare in a hose somewhere.

Not sure if this really helps you or not ,

Water pump need's to be changed at every 60,000 / 70,000 miles ( i think)
Im sure someone will have the exact figure.

If your bottom rad hose came off i wonder is there now air trapped in the
system ???? if so that would cause your prob

Niall.
 
If i remember correctly the waterpump should be changed with the timing belt
 
I ran the car at idle with the cap off the header tank so there shouldnt be an air lock.
Car has 86000KM on it.
Timing belt was done at 65000 but no mention of water pump on the invoice.
 
The waterpump is a very reliable unit on Subaru's, unlike VAG and BMW. I have never replaced a pump on a Subaru yet, nor heard of a problem. As far as I know there is no reccomended replacement interval by Subaru.

John
 
OK so it may not be the water pump which is good news because getting to it involves removing the timing belt which sounds like a big labour bill.

Should I try reving the car with the header tank cap off to double check that there isnt an air lock?
 
Andy have checked the that ya havent maybe blown a head gasket...dont wana alarm ya but its worth checking??
 
It's a terrible problem to have!
I dont envy you there,
Keep us posted with how you get on and best of luck!
Dan
 
scoobyke said:
Andy have checked the that ya havent maybe blown a head gasket...dont wana alarm ya but its worth checking??
Click to expand...

How do I check that myself without going to a garage?
 
I think your's is a V5 type R, so you should have steel head gaskets, these are very good and rarely fail. You said the temp rises, and then the fan cut's in. The temp keeps rising, so I imagine the fan stays on. When the fan is running for more than 1 minute, place your hand behind the fans and feel if the air is hot, warm or cool. And post back,,,

John
 
OK fan kicked in at 92 degrees. Temperature stayed at 93 degrees for a few minutes then I turned off engine. And its cold air blowing behind the fans.
 
Andy to check if it could be your gaskets check your oil...there might be like white foamy stuff in it...? :dunno:
 
johnny99 said:
I think your's is a V5 type R, so you should have steel head gaskets, these are very good and rarely fail. You said the temp rises, and then the fan cut's in. The temp keeps rising, so I imagine the fan stays on. When the fan is running for more than 1 minute, place your hand behind the fans and feel if the air is hot, warm or cool. And post back,,,

John
Click to expand...

Does a v4 sti have steel head gaskets??
 
Was the engine running at the same time as you felt the air was cold. Is so, it's bad circulation. Most common cause is rad. If you want, I have a rad you can try, if you want to come down some day and put it in you can. I don't want too reccomend you buy a new one yet, as it's very hard to do diagnostics on a forum, which can lead to you spending a lot of money on parts you dont need.

John
 
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