help overheating

[bowwow]

help love my surf just read all scary threads about heads being replaced...had 2 incidents of temp gauge going up 1 month ago so got looked over and radiator flushed problem seemed to go away....until yesterday when on finishing journey from london to newcastle temp rose to just under red and then dropped as fan kicked in..but today happened 3 times..went to local garage who said just to have new thermosat fitted but now worried should be replacing radiator as well...any advice???was due to head down to london monday but think better leave car behind...what shall I do don't want head to go advice please....(h reg 2.4 auto jap import)

[jotto]

help love my surf just read all scary threads about heads being replaced...had 2 incidents of temp gauge going up 1 month ago so got looked over and radiator flushed problem seemed to go away....until yesterday when on finishing journey from london to newcastle temp rose to just under red and then dropped as fan kicked in..but today happened 3 times..went to local garage who said just to have new thermosat fitted but now worried should be replacing radiator as well...any advice???was due to head down to london monday but think better leave car behind...what shall I do don't want head to go advice please....(h reg 2.4 auto jap import)

The only things you can do are replace the rad cap & thermostat, when refilling the system make sure all air locks are removed if it is still over heating get a pressure test done to see if the head has gone.

[dirtydog]

yep sounds like the thermostat... if mine even thinks about getting slightly warm the viscous fan is on.
only need to change the rad if its leaking and losing water.

[bowwow]

yep sounds like the thermostat... if mine even thinks about getting slightly warm the viscous fan is on.
only need to change the rad if its leaking and losing water.

def not leaking or losing water but wonder if might be blocked?????will ask the garage....water was brown before had radiator flushed now clear...also would viscous fan come on if thermosat was faulty???

[bowwow]

The only things you can do are replace the rad cap & thermostat, when refilling the system make sure all air locks are removed if it is still over heating get a pressure test done to see if the head has gone.

thanks so much....feel a little wiser but crossing my fingers

[Koi]

def not leaking or losing water but wonder if might be blocked?????will ask the garage....water was brown before had radiator flushed now clear...also would viscous fan come on if thermosat was faulty???

Viscous fan is on all the time regardless of thermostat, do a search for viscous fan on here and you will find plenty of threads on it to help you understand how it works.

As for the overheating, change rad cap & thermostat, you could try and get the rad flushed out if its blocked. In my opinion if the rads blocked then the temp would rise every time you went up a decent hill or drove over 60mph ish as a blocked rad wouldn't allow sufficient cooling. Change cap & stat double checks for air locks (make sure all heaters are to the hot position) then drive your Surf.
If the heads gonna go its gonna go, theres nothing you can do to stop it happening, its a design fault. If it has gone or goes then fitting a NEW head will give you lots of happy Surfing to come. I know its easy to just type this all down but basically thats the bottom line.

[dirtydog]

just realised what I actually typed and how little sense came out of it

listen to Koi

[bowwow]

Viscous fan is on all the time regardless of thermostat, do a search for viscous fan on here and you will find plenty of threads on it to help you understand how it works.

As for the overheating, change rad cap & thermostat, you could try and get the rad flushed out if its blocked. In my opinion if the rads blocked then the temp would rise every time you went up a decent hill or drove over 60mph ish as a blocked rad wouldn't allow sufficient cooling. Change cap & stat double checks for air locks (make sure all heaters are to the hot position) then drive your Surf.
If the heads gonna go its gonna go, theres nothing you can do to stop it happening, its a design fault. If it has gone or goes then fitting a NEW head will give you lots of happy Surfing to come. I know its easy to just type this all down but basically thats the bottom line.

thankyou very very helpful heading off now with your advice on board thks

[Sandstorm]

thankyou very very helpful heading off now with your advice on board thks

you must check the WATER PUMP as i found to my cost had the head presure tested and passed. So $450 later stil over heating all down to a broking water pump