The Bain Of My Existance

[ENVI.BA]

this is the heater core which my mechanic pulled from my car last week. the bottom channel blew up like a balloon and pulled the channel away from the inlet.

Ford are saying its my car which caused it to happen and that its not covered under their parts warranty. my car had not overheated at all but it still managed to pull enough pressure to do this.

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the bottom channel should look like the others

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The tiny little hole

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note the lack of side protection. Unlike rads heatercores do not have a side bar which stops bulging

[RHR]

Well that's crap. If your mechanical minded you would always put a new one in your self.

Mate I had two go on me. Ford did one and I did the second

[ZAP]

I would call up Ford CRC and have a whinge to them, as it should be covered under warranty.

They have to prove that it was caused by abouse or some other factor that excuses them from coverage.

[ENVI.BA]

my mechanic did both. initially I thought it was a dodgy core and had it replaced then it happened again and when I checked it with a multimeter the voltage in the coolant was a bit high so it was put forward that it was electroysis that killed it so we were going put an earth strap on the core and put inhibiter in.

if it was anything less the second time I would have done it

[ENVI.BA]

I just dont get how it could build up enough pressure to do this without overheating or blowing anything else.

I must say that when it did burst I was giving my car a bit but the same core is used in xr6 turbo's, xr8's and all these cars on this forum that pull 600+kw's

[dashturbo]

maybe you got a problem with the head or head gasket, between the water jacket and the combustion chamber.

Has he checked the pressure of the coolant system? does it fluctuate with the engine running? this will cause corrosion and massive pressure, can blow sh*t apart!

[ENVI.BA]

it was looked at when I last had it serviced and there was no faults.. no oil in the coolant just a stray current which was reduced after adding inhibitor and an earth strap.

I had blown a heater hose last january, only after driving all night then tapping the accelerator a bit after starting the car but apart from that nothing really.

[dashturbo]

there doesn't need to be oil in the coolant.

However it definitely sounds like a pressure build up from either the combustion chamber or boost somehow? take the radiator cap off(when the car is cold) and start the car, when its idling the water shouldn't bubble or vibrate much, then put your hand over the hole and feel if there is a vibration.

Maybe get another mechanic to have a look see.