Radiator expansion tanks
Discussion
As far as I know, the tank does not have to be higher than the engine, but it's a good idea for the feed pipe to be high up, so that any bubbles get pushed out to the tank.
You can also have a tank which is pressurised, and one which is not, depending on what you want to do.
The non-pressure one needs a radiator cap with a 'return' valve in it. They are fairly common.
You can also have a tank which is pressurised, and one which is not, depending on what you want to do.
The non-pressure one needs a radiator cap with a 'return' valve in it. They are fairly common.
WELLLLLL That's cute, where did the thermostat extension housing with cap come from (which I like), but then you have a non pressurised expansion tank, if it were me I would want that to be changed to a pressuring version, but where to fit it, as it is full in there?
I am thinking about this an letting other put their pennies worth in.
Adrian@
PS the housing get rid of TVR's OE tube header...we need another 2500 pictures to help us.
PPS How do I stop skimwords adding links anyone!
I am thinking about this an letting other put their pennies worth in.
Adrian@
PS the housing get rid of TVR's OE tube header...we need another 2500 pictures to help us.
PPS How do I stop skimwords adding links anyone!
Edited by Adrian@ on Thursday 12th February 17:35
I've seen that fitting before on a Triumph L6 ...er......somewhere.
I know that some of the L4 ones fit too (1300,1500), they use the same gasket...can't remember if it's one of them?
Anyway, you can just use a longer tube and move the tank - should work just the same, even if it's lower. Just make sure the new pipe goes almost to the bottom of the expansion tank, so there's always coolant covering it.
I know that some of the L4 ones fit too (1300,1500), they use the same gasket...can't remember if it's one of them?
Anyway, you can just use a longer tube and move the tank - should work just the same, even if it's lower. Just make sure the new pipe goes almost to the bottom of the expansion tank, so there's always coolant covering it.
RCK974X said:
I've seen that fitting before on a Triumph L6 ...er......somewhere.
I know that some of the L4 ones fit too (1300,1500), they use the same gasket...can't remember if it's one of them?
Anyway, you can just use a longer tube and move the tank - should work just the same, even if it's lower. Just make sure the new pipe goes almost to the bottom of the expansion tank, so there's always coolant covering it.
I would want it pressurised... but I cannot see how to put a double vent on the special cap thing (or if it will take a blanking cap as I have never seen one) to then put a bleed over from the radiator header (because that is what I would want) and then add a 13lb pressuried expansion tank in place of the overflow version that is there.I know that some of the L4 ones fit too (1300,1500), they use the same gasket...can't remember if it's one of them?
Anyway, you can just use a longer tube and move the tank - should work just the same, even if it's lower. Just make sure the new pipe goes almost to the bottom of the expansion tank, so there's always coolant covering it.
Adrian@
Adrian@ said:
I would want it pressurised... but I cannot see how to put a double vent on the special cap thing (or if it will take a blanking cap as I have never seen one) to then put a bleed over from the radiator header (because that is what I would want) and then add a 13lb pressuried expansion tank in place of the overflow version that is there.
Adrian@
Up to you of course - pressurised ones are sealed so don't collect any crap from outside which is a bonus, but then you would need a blank type rad cap, (they do exist !) and move pressure cap to expansion tank.....Adrian@
No biggie either way.
Just for interest, when I built a kit with a 2500 engine in it, I used an early T 1500 radiator, which has two top hose feeds, and the 1500 thermostat cover fitted perfectly on engine.... used that rad because it was exactly as big as the hole in car, for max cooling .... This is why I think that cover in photo may come off a 4 cyl car...
I made my own, and run a fully pressurized system with an expansion tank of 1.5 litres that is half full of air when cold.
To remove bubbles do the tank circulate with 2 ø8mm tubes, one froom the highest point on the engine and one from the top of the radiator. The retun tube is connected to the low pressure side of the water pump.
The tank is under the front screen, and uses a peugeot 207 cap
To remove bubbles do the tank circulate with 2 ø8mm tubes, one froom the highest point on the engine and one from the top of the radiator. The retun tube is connected to the low pressure side of the water pump.
The tank is under the front screen, and uses a peugeot 207 cap
madsvlund said:
I made my own, and run a fully pressurized system with an expansion tank of 1.5 litres that is half full of air when cold.
To remove bubbles do the tank circulate with 2 ø8mm tubes, one froom the highest point on the engine and one from the top of the radiator. The retun tube is connected to the low pressure side of the water pump.
The tank is under the front screen, and uses a peugeot 207 cap
Love that idea. Might try and find something like that for mine and plumb it up somehow. Are those inlets standard?To remove bubbles do the tank circulate with 2 ø8mm tubes, one froom the highest point on the engine and one from the top of the radiator. The retun tube is connected to the low pressure side of the water pump.
The tank is under the front screen, and uses a peugeot 207 cap
Regards.
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