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Unexplained loss of coolant 

 

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 Post subject: Re: Unexplained loss of coolant
Posted: Sun Oct 03, 2010 10:36 am 
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When the engine is hot the level will raise in the resevoir, when it is cold the level will drop. Keep an eye on it the air should be out of it by now.

 

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 Post subject: Re: Unexplained loss of coolant
Posted: Sun Oct 03, 2010 11:47 am 
Getting Side Ways
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Thanks to Timmytimtim, teknoslasher and frd906n for their input.

Brought a new radiator cap from Supercheap 120kpa it looks different to the original one on the plastic bubble.

When it cools down I'll take a photo of it and upload here.

The original looks sought of bent or twisted but has the ford signature whereas the one from Supercheap is straight.

Question is, does the cap need to be original i.e. purchased from ford?

Cheers
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 Post subject: Re: Unexplained loss of coolant
Posted: Sun Oct 03, 2010 11:57 am 
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bondy99 wrote:
Thanks to Timmytimtim, teknoslasher and frd906n for their input.

Brought a new radiator cap from Supercheap 120kpa it looks different to the original one on the plastic bubble.

When it cools down I'll take a photo of it and upload here.

The original looks sought of bent or twisted but has the ford signature whereas the one from Supercheap is straight.

Question is, does the cap need to be original i.e. purchased from ford?

Cheers


I don't think it has to be a Ford item, as long as the cap can hold the proper pressure you should be safe. If the old one has worn out, it may be letting coolant seep/leak out below the recommended pressure even if the bottle is not overfilled. Only escape route is through the overflow tube.

Hope this fixes the problem :).

 

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 Post subject: Re: Unexplained loss of coolant
Posted: Sun Oct 03, 2010 12:16 pm 
Getting Side Ways
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phongus wrote:
bondy99 wrote:
Thanks to Timmytimtim, teknoslasher and frd906n for their input.

Brought a new radiator cap from Supercheap 120kpa it looks different to the original one on the plastic bubble.

When it cools down I'll take a photo of it and upload here.

The original looks sought of bent or twisted but has the ford signature whereas the one from Supercheap is straight.

Question is, does the cap need to be original i.e. purchased from ford?

Cheers


I don't think it has to be a Ford item, as long as the cap can hold the proper pressure you should be safe. If the old one has worn out, it may be letting coolant seep/leak out below the recommended pressure even if the bottle is not overfilled. Only escape route is through the overflow tube.

Hope this fixes the problem :).



Thanks, so do I.

I'll let you know in about 4 days time when I'll check it again,

Cheers
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 Post subject: Re: Unexplained loss of coolant
Posted: Sun Oct 03, 2010 1:27 pm 
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I thought the factory one was 160kpa? or was it 16psi... :? can't quite remember now...

Cheers,
Tim

 

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 Post subject: Re: Unexplained loss of coolant
Posted: Sun Oct 03, 2010 2:29 pm 
Getting Side Ways
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timmytimtim wrote:
I thought the factory one was 160kpa? or was it 16psi... :? can't quite remember now...

Cheers,
Tim


G'day Tim,

Sorry, I don't know about that one, all I seen on mine was a cap saying 120Kpa.

I purchased the vehicle of another person, maybe it was fitted with an incorrect cap.

Cheers, Peter
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 Post subject: Re: Unexplained loss of coolant
Posted: Sun Oct 03, 2010 2:48 pm 
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bondy99 wrote:
timmytimtim wrote:
I thought the factory one was 160kpa? or was it 16psi... :? can't quite remember now...

Cheers,
Tim


G'day Tim,

Sorry, I don't know about that one, all I seen on mine was a cap saying 120Kpa.

I purchased the vehicle of another person, maybe it was fitted with an incorrect cap.

Cheers, Peter


Mine has the 120kPa too. 160kPA seems a bit excessive...will blow hoses off.

 

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 Post subject: Re: Unexplained loss of coolant
Posted: Sun Oct 03, 2010 3:39 pm 
Getting Side Ways
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could it also possibly be a block in the overflow pipe, which builds up pressure resulting in a heap of coolant being pushed out? if so it will clean itself up after a bit as the over flow should remove the blockage
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 Post subject: Re: Unexplained loss of coolant
Posted: Sun Oct 03, 2010 4:18 pm 
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16psi = 110kpa... I think thats what I may have been thinking of... :mrgreen:

 

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 Post subject: Re: Unexplained loss of coolant
Posted: Sun Oct 03, 2010 5:37 pm 
Getting Side Ways
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G'day all,

Yeah, I had a double check of that cap , she does not look good on clse up inspection, rubber seal is warped and slighly perished on the side.

I've replaced the cap and will see how it goes.

No blockage in the pipes, I've checked.

I'll upload the pics here shortly, to show you all.

Cheers
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 Post subject: Re: Unexplained loss of coolant
Posted: Sun Oct 03, 2010 6:06 pm 
Getting Side Ways
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Here are the pics

 

 

Attachments:
view 2 of old cap when turned slightly (Medium).JPG
view 2 of old cap when turned slightly (Medium).JPG [ 50.44 KiB | Viewed 78 times ]
rubber seal  perishing (Medium).JPG
rubber seal perishing (Medium).JPG [ 51.33 KiB | Viewed 89 times ]
new cap top view (Medium).JPG
new cap top view (Medium).JPG [ 65.61 KiB | Viewed 89 times ]
new cap underneath (Medium).JPG
new cap underneath (Medium).JPG [ 49.56 KiB | Viewed 76 times ]
new cap side view (Medium).JPG
new cap side view (Medium).JPG [ 53.47 KiB | Viewed 91 times ]
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 Post subject: Re: Unexplained loss of coolant
Posted: Sun Oct 03, 2010 6:10 pm 
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yeah that old cap is stoofed...

 

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 Post subject: Re: Unexplained loss of coolant
Posted: Sun Oct 03, 2010 6:28 pm 
Getting Side Ways
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timmytimtim wrote:
yeah that old cap is stoofed...


G'day Tim,

Yeah I hope that's the problem , I will know in a few days time, about 4 days from today and I'll also check for coolant leaks on the ground.
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 Post subject: Re: Unexplained loss of coolant
Posted: Tue Oct 05, 2010 5:56 pm 
Getting Side Ways
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Well, after replacing the radiator filler cap, some 2 days later, yeah I did notice some coolant loss again, it was half way between maximum and minimum.

I originally filled up to maximum.

Maybe it still has an air pocket for some unknown reason or leaking elsewhere, cannot see any internal leaks or external this time round.

Any ideas people?

Cheers, Peter
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 Post subject: Re: Unexplained loss of coolant
Posted: Tue Oct 05, 2010 6:01 pm 
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only that it may be leaking into a cylinder...

Will require a compression test to see if it blows air back into the cooling system...

Like I said, falcon systems are self bleeding... Once its been hot and the thermostat has open, it should be impossible to have an air pocket anywhere in the system... Thats the whole idea of the separate header tank place higher than the motor...

None of your welsh plugs are leaking? Have been under the car and looked up under the manifolds, etc to make sure you can't see nothing from that angle?

Cheers,
Tim

 

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Performance: Complete AUII VCT Wiring & Power Train, Pacey Headers, 2.5" Exhaust, Exedy Clutch, DBA Rotors
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Tunes: 8" Pioneer Sub, JBL Speakers, Clarion Double DIN Headunit

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