landrover radiator cap

[Am333rcr]

hi

is there supposed to be a rubber here on the outside? or is it the top of the rad that is deformed.?

i wont seal. meaning it wong suck water back from over flow

cheerd

 

[pcwizme]

I cant remember, I can have a look at mine later if I remember to have a look.

 

[zzr1200]

Depends if its fitted with an overflow bottle mine just vented into the engine bay.......

Model and year would be helpful?

 

[Barking Mat]

Looks pretty normal to me.

 

[jsf55]

The water gets sucked back in from the bit in the middle, should be lightly sprung if you pull it with your finger nails ?

 

[Am333rcr]

i have an over flow bottle. black bottle on the right hand side. series 3 1976

still doesnt seen to seal at the top though.

 

[roofman]

i have an over flow bottle. black bottle on the right hand side. series 3 1976

still doesnt seen to seal at the top though.

If it did not seal it would be getting forced out the rad when hot into the overflow (positive pressure)...once it cools the rad has a vacuum which then enables it to lift the centre of the cap for water recovery back into the rad. The caps are pressure rated so make sure you have the correct one for your system.

 

[Am333rcr]

pretty sure its the correct on . cap just isnt water /air tight. you can blow back down the pipe and hear ait leak out.

 

[8ob]

pretty sure its the correct on . cap just isnt water /air tight. you can blow back down the pipe and hear ait leak out.

There are a few different heights with those rad caps, sounds like yours has a deep neck on the rad and you have a short cap.

Bob

 

[octo0072000]

from memory there two lengths of cap short neck and long neck you may have the wrong one
bob strikes again

 

[8ob]

Long Reach Radiator Cap - 7lb Pressure | Durable Stainless Steel

Upgrade your cooling system with this durable long-reach radiator cap. Featuring a rubber seal and 7lb pressure rating, ensuring a leak-proof fit.

www.carbuilder.com

 

[jsf55]

pretty sure its the correct on . cap just isnt water /air tight. you can blow back down the pipe and hear ait leak out.

That would be right as the return valve in the middle is only lightly sprung ? have you tried measuring top to bas on them both ?

 

[Am333rcr]

never knew you got different depth of caps. getting a seal that fits so see what thst does. i can watch the levels

 

[Blobber]

If its got an expansion bottle shouldnt the rad cap just be a plain version with no innnards and the expansion bottle cap be the pressure type? if you put the traditional pressure type on the radiator it cant draw the water back in from the expansion bottle

 

[octo0072000]

If its got an expansion bottle shouldnt the rad cap just be a plain version with no innnards and the expansion bottle cap be the pressure type? if you put the traditional pressure type on the radiator it cant draw the water back in from the expansion bottle

not that type of system it's just a overflow bottle not pressurized no rad cap on bottle on series landy