Radiator Cap Verification

[alan.barker]

Bonjour Phil,
you can throw the Cap from TTR in the trash bin
Alan

[MarkDa]

Yes - never mind 'not great' it looks to be non existent!
Does it even have a bleed valve?

[pharriso]

Yes - never mind 'not great' it looks to be non existent!
Does it even have a bleed valve?

If you mean the valve that allows coolant to flow back into the radiator? yes, it does, but it's not going to do anything if the top of the cap does not seal against the radiator neck at the top surface.

[pharriso]

Anyone got a Supplier / part number for a good Radiator cap with the correcty pressure & 2 Rubber Seals for the Recuperation system please?

[fatboyoz]

Hi Phil,
Quick google search brought up this from Car Builder Solutions in the UK.

https://www.ebay.com.au/str/CarBuilderS ... 0221134014

Two SS, 10lb, radiator caps, with seals, about a third of the way down the page. Both recovery type. One with depressurising valve.

Cheers,
Colin.








quote="pharriso"]Anyone got a Supplier / part number for a good Radiator cap with the correcty pressure & 2 Rubber Seals for the Recuperation system please? [/quote]

[MarkDa]

SJ Sportcars

https://www.sjsportscars.com/parts-and- ... 6K0002.htm

Surely available in USA?

[pharriso]

SJ Sportcars

https://www.sjsportscars.com/parts-and- ... 6K0002.htm

How do you know it has 2 seals?

Surely available in USA?

There are plenty of 10 psi radiator caps that will fit, the only way you know it will be suitable for the Elan with a Recuperation system is to specify a part number. I will see if there are any identifying marks on my old one that was "Made in Mexico" & works.

[pharriso]

Hi Phil,
Quick google search brought up this from Car Builder Solutions in the UK.

https://www.ebay.com.au/str/CarBuilderS ... 0221134014

Two SS, 10lb, radiator caps, with seals, about a third of the way down the page. Both recovery type. One with depressurising valve.

Cheers,
Colin.

Anyone got a Supplier / part number for a good Radiator cap with the correcty pressure & 2 Rubber Seals for the Recuperation system please?

Thanks Colin, I think this one looks good - https://www.carbuilder.com/us/radiator-cap-rubber-upper-seal-10lb

[elancoupe]

I bought my 10 psi recovery cap from Summit Racing, had it in two days.

[pharriso]

I bought my 10 psi recovery cap from Summit Racing, had it in two days.

Part Number?

[elancoupe]

I am away from home at the moment, but will check tomorrow night.

[elancoupe]

I am away from home at the moment, but will check tomorrow night.

I checked their site, SUM-380174 is what I bought

[pharriso]

I checked their site, SUM-380174 is what I bought

10 psi -Looks perfect:

Thanks Mike

[alanr]

Well regarding the correct Radiator Cap pressure this is slightly confusing...

My +2 Lotus Workshop Manual says the Cap pressure should be 7 lbs sq in.
My '71 +2 Lotus Parts Manual says that up to Chassis 0927 it should be a 10lbs sq in radiator cap and from Chassis 0927 it should be a 7lbs sq in cap.
Just checked my car and I see that currently fitted and seemingly working fine I have a 13lbs sq in Cap fitted!!

Alan.

[MarkDa]

Does it really make that much difference as we're running 'solid' water systems?