Subaru with overheating issue ???

[Cannonballtaffyo]

Posting on behalf of pall ... Wrx with Toyosports radiator , doing rad flush . Replaced thermostat to find a cut out one there . When replaced with new it ran at 87degrees and never opened ... Simple dodgy thermostat , replaced with cut out while waiting for next to arrive ... Running great , no problems even when pushed .. Subaru genuine arrived fitted same issue but he forgotten to test before fitting .. No oil in water , no whining from water pump , believed to have bled system well .. Has his rad got a in built thermostat ? or does it have anything to do with the set up ... All suggestions appreciated ....

[Cannonballtaffyo]

Please ...

[Alec]

Try bbs.22b.com or bbs.scoobynet.com

[littleredrooster]

Sorry - I must be slow tonight - I don't fully understand the question. What's a 'cut-out' one? What's the relevance of 87 degrees? Is that not normal?

[Bill]

^^ this. What does the temp gauge say?

Edited by Bill on Friday 25th November 20:06

[catman]

A few thoughts. Some manufacturers offer more than one thermostat, depending on climate. Also, you say that the thermostat didn't open, how did you test it?

If the car was really overheating, the fan should come on. Does it? How do you know that the temp gauge or sender aren't faulty?

Does the car show any actual symptoms of overheating, or are you relying on the temp gauge?

Also, you've flushed the radiator, but are the cooling fins clear of any debris, such as leaves, mud etc.

Cheers

Tim

Edited by catman on Friday 25th November 20:02

[Cannonballtaffyo]

The cut out is simply the metal ring and rubber gasket no spring / else ... He tested it with 1/2 and fully boiled kettle . I am led to believe that Subaru ones open at 74 degrees n yes the fans kick In at 70 degrees ... Were both new at this .. Me changing engine n him advising lol but we are stuck ...

[catman]

Something doesn't add up to me. I don't think that the fan would come on at only 70 degrees and if it did, I don't think the car would reach a genuine 87 degrees.

It's possible that the gauge or sender are faulty and you're trying to fix a fault that doesn't actually exist. Also, I'm not convinced of the accuracy of testing a thermostat with a kettle of water.

Tim

[ScoobieWRX]

If you put in a manufacture spec thermostat that you tested using the boiling hot water method and it opened up then that's usually a good indicator the thermostat is working.

If your cut out thermostat doesn't cause overheating because it's basically straight through, and even thought the manufacturer one is working properly, and you've flushed the system out, you've checked that the water pump is circulating water, it has no leaks and isn't noisy, NO HGF issues, there are no blockages in the system, no airlocks, and the rad fans are working fine and cutting in when they should etc... etc..., then you have to question if the new radiator is functioning as it should.

Can you get hold of an OEM radiator? My next action would be to replace the Toyosports rad for an OEM rad to see if you still get overheating issues with the OEM thermostat fitted. If that cures it then you know there is an issue with the Toyosports rad. If it doesn't cure the issue then you have to methodically go over the whole thing again checking everything stage by stage.

It's difficult to diagnose anything remotely, specially overheating issues. You need to be there to see everything first hand.

Edited by ScoobieWRX on Sunday 27th November 06:58

[cheesesliceking]

ScoobieWRX said:

you have to question if the new radiator is functioning as it should.

This, plus eleventy million. if everything else is working fine, then try a standard rad before things get worse/