Overheating again - sorry!!

[Junks]

Hi guys

Well I decided to use my old Surf while I look for a new shape one & typically it's decided not to play ball!

It overheats in about 6 miles - now it used to be ok but I've had a replacement pump fitted so they're bound to have removed the water hoses.

Initially I thought it could be the thermostat but cheaked that today & it hasn't got one! I'm obviuosly hoping it isn't the HG as it's already had a new head about 18 months ago.

Symptoms are it overheats & blows the water out - heater doesn't get hot & rad fan seems to be on very early, so it would seem to be an air lock??

I've done a search & found plenty of info about it but no instructions as to the procedure to best bleed the system.

Any help would be great thanx

[MattF]

Symptoms are it overheats & blows the water out - heater doesn't get hot & rad fan seems to be on very early, so it would seem to be an air lock??

I've done a search & found plenty of info about it but no instructions as to the procedure to best bleed the system.

http://www.allhead.com.au/cooling.html


Matt

[it's Jim]

http://www.allhead.com.au/cooling.html


Matt

I'm a surf newbee, only had my motor 2.4 ssrx for 4 weeks did the same. took it back to the garage and they put a new thermostat and radiator cap on it. drove for another two weeks did the same again. took it back in on friday looks like the HG thank god its under warranty.
Also every now and again it will jump through the revs, i will be driving at 2000rpm then it will jump to 2500 then back to 2000. plus there is no pattern when it does it. Any ideas?

[fatfires]

I'm a surf newbee, only had my motor 2.4 ssrx for 4 weeks did the same. took it back to the garage and they put a new thermostat and radiator cap on it. drove for another two weeks did the same again. took it back in on friday looks like the HG thank god its under warranty.
Also every now and again it will jump through the revs, i will be driving at 2000rpm then it will jump to 2500 then back to 2000. plus there is no pattern when it does it. Any ideas?

If you are backing it for a HG make sure you have a look at the head while it is off for cracks - usually from 1 valve to the other AM I RIGHT?? you dont want to be fobbed off with a gasket if the head is suss - should you need a head get it from stevo - they should be willing to fit the modded head as it would be more reliable for you and less potencial probs for them!!
hope you get it sorted OK

[jec456]

Overheating

Had a similar problem with my 3.0l tried everything. Everytime I towed caravan it overheated would lose water but could not find problem eventually by trial and error found that the centre of the rad was cold but outside hot water was evaporating before it hit the ground replaced the radiator and haven't had a problem since that was over 3months ago!

Hi guys

Well I decided to use my old Surf while I look for a new shape one & typically it's decided not to play ball!

It overheats in about 6 miles - now it used to be ok but I've had a replacement pump fitted so they're bound to have removed the water hoses.

Initially I thought it could be the thermostat but cheaked that today & it hasn't got one! I'm obviuosly hoping it isn't the HG as it's already had a new head about 18 months ago.

Symptoms are it overheats & blows the water out - heater doesn't get hot & rad fan seems to be on very early, so it would seem to be an air lock??

I've done a search & found plenty of info about it but no instructions as to the procedure to best bleed the system.

Any help would be great thanx

[Junks]

Cheers Guys - turned out to be a dodgy rad cap!! Grrrrrrrrrr! Water was just syphoning out when my back was turned causing an airlock, must remember in future to check the simple things first!!

[robin purser]

Seems like the thread for me. HELP

Hello,
Using water then? I have a Surf 3.0 SSRX. Well maintained I thought.
Wife had it overheat on her around 6 weeks back. I topped up and checked for leaks but could find nothing wrong. No steam from exaust. No oil in water or vice versa. Not blaming her as well checked truck. I think it used the water then heated. Not heated then started to use water.

Now uses water. 3 litres in 150 miles!!
Had a friend put a pressure tester on the rad, stayed in the green until revved, then moved up in to the red zone on his pressure gauge.
HG? Head crack or maybe something smaller I'm missing. Cant seem to find any leaks, was flushed about 8 months ago, new coolant. Oil c hanged every 4 K. Gentle drives and no tough work.
Gonna be a right mission to do the HG etc. I thought the 3.0 L were bullit proof, the car in front is a Toyota, then you go past it as its broken on the side of the road(-:

[MattF]

The 3L's have their share of head problems as well. Have you replaced the
thermostat and rad cap?

[robin purser]

Would be a smart move.

Hi Matt,
Cheers for coming back to me so soon.
I did'nt think the rad cap or thermostate could cause water loss?
I fill the rad and the exspansion tank each time it uses water, then the whole exspansion tank is emtied and the rad water is used up.

Could the stat cause the pressure increase in the system at increased engine RPM?

Am I wrong? Happy for any advice.

R

[robin purser]

Just ordered, so we'll see

Hello again.
Just ordered a rad cap and thermostate from Milner, so try that first, and hope for the best. If anyone else can keep their fingers crossed for me from Friday through to Sunday on the test drive please do. Thank you.
R

[BUSHWHACKER]

You may have a leaky rad. After a run, lift the bonnet and take a close look at the top of the rad, especially around the rad cap area and see if there's any hissing or bubbling. It's hard to see leaks when the engine is cold, it needs to be hot and under pressure for them to be visible.
Also, if air has got into the cooling system, (because of the leaks in the rad) then the airlock will be circulating around and pushing the coolant out into the expansion tank. (if the rad cap seal is knackered)
If the thermostat is duff, then the coolant will be by-passing it too early.

[That Ruddy Squirrel]

Hi Matt,
Cheers for coming back to me so soon.
I did'nt think the rad cap or thermostate could cause water loss?
I fill the rad and the exspansion tank each time it uses water, then the whole exspansion tank is emtied and the rad water is used up.

Could the stat cause the pressure increase in the system at increased engine RPM?

Am I wrong? Happy for any advice.

R

You FILL the Expansion tank ?

Are you aware it has min and max lines ?

Have you burped the baby (with BOTH heaters set to hot) to remove air locks ?

Sorry if I am teaching you to suck eggs


Trev

[robin purser]

Sorry bad use of English

Hi Trev,
Thanks for your thoughts. Sorry I should say I put coolant in the rad up to the top, then fill the expansion tank to the full line. This then all gets used up?
So seems to suck in the coolant from the ex. tank and then start to use the rad coolant to.

All seems a bit odd realy. I can see how it could blow out if the rad cap or HG or head if it was gone. But if it is being blown out to the ex tank, it should over flow to loose the water, then on the engine cooling down suck the remainder back in. Can't see any overflow.
I will run it up to full heat again tomorrow once the cap and stat is in. Not burped it, so will need to put the heaters on as suggested. Do I need to do the burping thing with pipes and bottle etc. Or just run it up with heaters on and keep filling? Rad cap seems like the highest point.

I have looked at the rad, looks very clean. No water marks. Took the skid plate off and laid under it ( Enigine Off ) and could not see any mark on anything. I am scared and confused.

Could the system pressure increase when engine RPM is lifted to about 2 K?

Much apprecaited for all the thoughts and experience being shared out here.

Cheers R.

[BUSHWHACKER]

I kept on loosing coolant a few weeks ago, the expansion tank was always full to the brim and nothing under the rad cap (different place on the 2.4), no leaks etc. Then I happed to look at the under side of the rad cap and noticed the rubber seal was torn so wasn't sealing properly and the coolant wasn't held in the engine. It was going straight into the expansion tank when hot then out the overflow onto the road when driving. By the time I got home, there was no puddles under the truck 'cos it was all blown and dried away.

New rad cap, no more coolant loss!

[robin purser]

I hope

Hi Vince,
I hope it goes the same for me. Cheers for taking the time out to answer.

I will get the parts tomorrow. So I'll try to get it sorted tomorrow eve, maybe a Friday night job though.

I will then update this string so we can all see the outcome. I guess I will need to watch it over a few weeks, but I'll keep the post up to speed.

FYI. Changed an inner CV boot the other day. Not such a bad job. However put the whole back in, then notice the C -clip that holds the Tri ax in place was still on my workshop bench, Did I swear? Maybe.

Did all the pads and disks while I was around the truck. Easy job with an 1/2 inch drive air gun. A bit like lego!

Cheers R.