Petrol cap rubber

[trimprop]

Morning all,

 

Quick question - I've just replaced the rubber seal on my petrol lid (it's the trigger flip-up type), and I noticed the old one had a little hole in the centre, but the new one doesn't? Any consensus on this - should I add a hole or not?

 

Changed it as I think that on hot days the petrol was vapourising and leaving via the cap - the rubber was very cracked around the edges. (the car is in a garage that really heats up on warm days - good for keeping it dry...)

 

Thanks in advance.

[Richard Crawley]

Morning all,

 

Quick question - I've just replaced the rubber seal on my petrol lid (it's the trigger flip-up type), and I noticed the old one had a little hole in the centre, but the new one doesn't? Any consensus on this - should I add a hole or not?

 

Changed it as I think that on hot days the petrol was vapourising and leaving via the cap - the rubber was very cracked around the edges. (the car is in a garage that really heats up on warm days - good for keeping it dry...)

 

Thanks in advance.

 

Have a read of this; there are probably other threads as well.

 

http://www.tr-register.co.uk/forums/index....;hl=petrol+caps

[trimprop]

Have a read of this; there are probably other threads as well.

 

http://www.tr-register.co.uk/forums/index....;hl=petrol+caps

 

Thanks for this - I did do a search, but you can't put the word 'cap' in as it's only got three letters.

 

As the catholic priest would say, "I am going to put a hole in the rubber"

 

Oh and if anyone's bored and wants to make a quick engine bay tart up tip, Halfords sell boxes of ten jubilee clips - it's a ten min job to replace all the clips on the throttle intakes and air pipes/breathers - and the difference it makes is well worth it.

[david ferry]

I remember going through this some years ago when restoring my UK TR6.

 

The answer is make a hole so the cap vents, assuming you have a UK car, or if the old rubber seal had a small hole in the middle.

 

I suspect that as these are being remade somewhere foreign, they are being made for the global market and quite simply, it is easy for owners needing the vent hole to create it, and rather difficult for those not needing it to fill in a hole were it there.

 

This 'flexibility' will have significantly reduced the manufacturing costs and supply costs as only one part is needed instead of two.

 

This makes sense really.

 

The only problem is when you do not know if you need the hole in the seal or not.

 

Regards

 

David

[Richard Crawley]

I remember going through this some years ago when restoring my UK TR6.

 

The answer is make a hole so the cap vents, assuming you have a UK car, or if the old rubber seal had a small hole in the middle.

 

I suspect that as these are being remade somewhere foreign, they are being made for the global market and quite simply, it is easy for owners needing the vent hole to create it, and rather difficult for those not needing it to fill in a hole were it there.

 

This 'flexibility' will have significantly reduced the manufacturing costs and supply costs as only one part is needed instead of two.

 

This makes sense really.

 

The only problem is when you do not know if you need the hole in the seal or not.

 

Regards

 

David

David,

You’re absolutely correct regarding replacement rubbers; my problem back then was with the US cap I was sold! I think the specialist suppliers should take more responsibility to make sure what they sell is correct or at least advise what you need to do to make it so. It is quiet important & you shouldn’t have to suffer the consequences & work it out for yourself; many probably wont be able to!