Expansion Tank breather issue

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Mikebmth
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Expansion Tank breather issue

Post by Mikebmth »

Hi all,

Hope some one can shed some light on this bitch of a job, basically my expansion tank split during run to Beaulieu today so after Andrei put another one on from the spares he had laying about but the overflow / breather is clear on the tank itself.

Pipes all clear but my breather runs into the inlet and into a 90 degree piece that seems to be blocked up so the breather is not functioning at all, we tried clearing it out and filled with carb cleaner etc to no avail..Wonder if this is remnants of my HG failure recently.

Basically any idea on how to clear this, have tried upto 40psi through it and nothing moved, sorry pic a bit vague but best I could do with equipment.
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Free Parking is a bonus, leaving my Cav in a carbon dust filled carpark is not.....
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Cavalier342
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Re: Expansion Tank breather issue

Post by Cavalier342 »

Ye we tried carb cleaner, air pressure, paper clip, screwdrivers, I thought I could see a blockage where the 90 degree join is, but just couldn't shift it.
Previous:
China Blue 1989 Vauxhall Cavalier L 18SV
Kings Blue 1992 Vauxhall Cavalier LSi Auto C18NZ
Smoke Grey 1994 Vauxhall Cavalier V6 C25XE

Am I a light sleeper or a heavy sleeper? Well that depends on how much I've had to drink...
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btcctroy
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Re: Expansion Tank breather issue

Post by btcctroy »

Remove it and soak it in petrol
....with a brew and my favourite biscuits.
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Cavalier342
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Re: Expansion Tank breather issue

Post by Cavalier342 »

Not a bad idea really but it's a part of the inlet, so will mean having to remove the throttle body. Can't separate it.
Previous:
China Blue 1989 Vauxhall Cavalier L 18SV
Kings Blue 1992 Vauxhall Cavalier LSi Auto C18NZ
Smoke Grey 1994 Vauxhall Cavalier V6 C25XE

Am I a light sleeper or a heavy sleeper? Well that depends on how much I've had to drink...
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btcctroy
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Re: Expansion Tank breather issue

Post by btcctroy »

So does the throttle body not come off.
....with a brew and my favourite biscuits.
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Kevwaggy
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Re: Expansion Tank breather issue

Post by Kevwaggy »

If its from the expansion tank to the throttlebody then isn't it the automatic choke?
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Mikebmth
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Re: Expansion Tank breather issue

Post by Mikebmth »

Its off the top of the expansion tank, the 2 hoses one feeds back to radiator the other on my one feeds to the inlet as shown in the picture.

A second pipe then feeds from this to just above the thermostat as a return pipe I would assume, seems the join between the 2 pipes in the 90 degree section where the pipes bolt to it is blocked with gunk of some kind and we just can not get it to clear.

This I assume needs to be clear to allow any excess from the expansion tank if the engine gets too hot it then feeds back into the water supply.
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Free Parking is a bonus, leaving my Cav in a carbon dust filled carpark is not.....
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Mikebmth
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Re: Expansion Tank breather issue

Post by Mikebmth »

This is clearer so you can see the part I have issues with
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Free Parking is a bonus, leaving my Cav in a carbon dust filled carpark is not.....
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Mikebmth
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Re: Expansion Tank breather issue

Post by Mikebmth »

No one got any ideas then huh???

Is this just a straight through pipe or is it there for any other reason ie can I bypass it and run a return feed from the expansion tank direct to the port above the thermostat..
Free Parking is a bonus, leaving my Cav in a carbon dust filled carpark is not.....
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Gaz
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Re: Expansion Tank breather issue

Post by Gaz »

its just to heat the throttle body in minus conditions, just loop it out
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TurboDan
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Re: Expansion Tank breather issue

Post by TurboDan »

Just bypass it, you'l find your car might actually run better.
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Cavalier342
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Re: Expansion Tank breather issue

Post by Cavalier342 »

Bypassing it is too easy then in that case, all you need is a hose from a C18NZ or 18SV that runs straight from the expansion tank to the thermostat housing as on mine. :thumb Then block off the exposed pipes.
Previous:
China Blue 1989 Vauxhall Cavalier L 18SV
Kings Blue 1992 Vauxhall Cavalier LSi Auto C18NZ
Smoke Grey 1994 Vauxhall Cavalier V6 C25XE

Am I a light sleeper or a heavy sleeper? Well that depends on how much I've had to drink...
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Mikebmth
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Re: Expansion Tank breather issue

Post by Mikebmth »

Cheers guys, wondered if it did anything vaguely important but seems like another rubbish design from Vauxhalls boffins..Lol

Will go find a pipe to suit now... :thumb
Free Parking is a bonus, leaving my Cav in a carbon dust filled carpark is not.....
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Cavalier342
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Re: Expansion Tank breather issue

Post by Cavalier342 »

I might have a spare one Mike, come to think of it, as I kept all the coolant hoses from the old manual. If you want.
Previous:
China Blue 1989 Vauxhall Cavalier L 18SV
Kings Blue 1992 Vauxhall Cavalier LSi Auto C18NZ
Smoke Grey 1994 Vauxhall Cavalier V6 C25XE

Am I a light sleeper or a heavy sleeper? Well that depends on how much I've had to drink...
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Mikebmth
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Joined: Sun Jan 09, 2011 8:04 pm
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Re: Expansion Tank breather issue

Post by Mikebmth »

Cavalier342 wrote:I might have a spare one Mike, come to think of it, as I kept all the coolant hoses from the old manual. If you want.
Nice one mate, will be round at some point.....Probably weekend now :thumb
Free Parking is a bonus, leaving my Cav in a carbon dust filled carpark is not.....
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Cavalier342
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Re: Expansion Tank breather issue

Post by Cavalier342 »

Ye I'll double check my surplus storage warehouse. Give us a shout when you're popping over. Probably be Sunday then.
Previous:
China Blue 1989 Vauxhall Cavalier L 18SV
Kings Blue 1992 Vauxhall Cavalier LSi Auto C18NZ
Smoke Grey 1994 Vauxhall Cavalier V6 C25XE

Am I a light sleeper or a heavy sleeper? Well that depends on how much I've had to drink...
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