HEADER TANK (AGAIN )

[jamcarr2]

At last I have found a suitable header tank to do the conversion on the cooling system .............or at least I thought I had its of a ford cosworth and the perfect shape to fit around the suspension strut but on getting it home I now notice that there it no overflow on it I don't mean there's no hose I mean no overflow its a sealed unit just two holes one in and one out .The question is will this make a difference or will it still work without the overflow .

JOHN

[KOY 23]

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Is there a pressure cap? If not, it is not safe to use it as pressure could increase until something goes bang.

John.

[jamcarr2]

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KOY 23 wrote:

Is there a pressure cap? If not, it is not safe to use it as pressure could increase until something goes bang.

John.

yes it has a pressure cap

JOHN

[jamcarr2]

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Yes it has a pressure cap

JOHN

[KOY 23]

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Its got two caps

When the pressure lifts the seal in the cap, where does the water go?

The normal route is into the neck of the filler and out of the overflow.

[jamcarr2]

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KOY 23 wrote:

Its got two caps

When the pressure lifts the seal in the cap, where does the water go?

The normal route is into the neck of the filler and out of the overflow.

Just been to the garage to investigate .It is a screw on cap the inside centre of the cap is spring loaded making it a pressurised cap , the threads that the cap screws on to has slots cut in them so I presume that if the pressure gets to great the inner cap lifts and the water is pushed down the threads and over the top of the tank .I cant post a picture because my daughter has taken my camera to Spain with her (kids )

JOHN

[KOY 23]

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John

That should be OK, but depends on what the pressure cap is rated at. Does it have a level switch? One of the reasons I fitted my (Merc) tank was that I would be warned of any leak before it got critical.

John

[jamcarr2]

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no it doesn't have one ideally that was what I wanted but been looking for months and this was the best I could find I'll probably see loads now I have got one

JOHN

[martin]

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Hiya John, make sure both connections to the tank are below the water level, otherwise on cooling the engine just sucks air. The cap sounds the same as a Volvo one, that's rated at a fraction over 21 lbs. Martin.

[jamcarr2]

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martin wrote:

Hiya John, make sure both connections to the tank are below the water level, otherwise on cooling the engine just sucks air. The cap sounds the same as a Volvo one, that's rated at a fraction over 21 lbs. Martin.

Thanks for that marttin will do .............looks very similar to the volvo

JOHN

[jamcarr2]

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well I have given up on the ford header tank would not fit. But the good news is I found a volvo one and its now fitted it has a low water warning on it but I haven't wired it in yet . I will need a bit of advise on doing that ..........i am a bit thick when it comes to electrics :P

JOHN

[DJT]

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jamcarr2 wrote:

well I have given up on the ford header tank would not fit. But the good news is I found a volvo one and its now fitted it has a low water warning on it but I haven't wired it in yet . I will need a bit of advise on doing that ..........i am a bit thick when it comes to electrics :P

JOHN

John,

I have just fitted my Volvo tank to my new Stag. I wired the warning switch in quite simply. Took a feed from the fused side of the ignition controlled fuse. Connected this to one side of a warning buzzer, which I ty-wrapped to the relay board. Then fed a wire from the other side of the buzzer, through the grommet near the wiper motor and connected it to the switch. The other side of the switch goes to earth. You could substitute a warning light for the buzzer.

I like your header tank. Which model of Volvo does that come from? Mine is from a 760 and is a bit longer. Yours look a bit neater.

Dave

[jamcarr2]

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Dave

The tank is of a V70 very pleased with the fit . The wiring sounds simple will give it a go. where did you get the buzzer . I thought of wiring mine to the seat belt warning light as I no longer use it but in bright sun light it may be hard to see ,a buzzer may be better

JOHN

[DJT]

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jamcarr2 wrote:

Dave

The tank is of a V70 very pleased with the fit . The wiring sounds simple will give it a go. where did you get the buzzer . I thought of wiring mine to the seat belt warning light as I no longer use it but in bright sun light it may be hard to see ,a buzzer may be better

JOHN

John,

Suitable buzzers are available from Maplins, or any electronics parts shop or boating parts shop. Millions on ebay for a few pence. Just type '12v buzzer' into the 'Find' box.

Dave

[jamcarr2]

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Thanks Dave

Just ordered one, less than a tenner

JOHN