Does anyone have a diagram on the theory behind re-doing the cooling pipes on a Pinto. Currently have a DGV carb on there, but changing to a TWin
Delorto set-up. This means losing the water pipe that goes to the original manifold.
My thoughts are to go to an alloy Header Tank with a pressure cap, and a expansion tank off of that.
ALSO, got a rather large Ford radiator fitted again with a presuure cap. Thinking of changing this to the Polo radiator (Mk 2?) at the same time.
The fan is currently switched from the dash board, but interested in peoples opinion on this setup versus a thermo controlled fan. Which Fan is used
with the VW radiator ??
Thanks in advance 
I have just put my Pinto on zzr1100 carbs and had to do away with the return pipe from the manifold. instead i welded a small boss on the manifold
plate with an allen bolt in to act as a bleed to ensure that all the air is out and it works fine :-)
Kev
Sounds like a good answer to the problem, also it is the mk2 polo rad you want, cheap as chips!
This is how I did mine
More in my gallery if required.
Cheers
Rich
Alternative put a Tee into the top hose and use a Landrover PRRT thermostat inserted in the bottom hose.
see ebay item 370106038839
Rescued attachment prt.JPG
quote:
Originally posted by wrigglypig
I have just put my Pinto on zzr1100 carbs and had to do away with the return pipe from the manifold. instead i welded a small boss on the manifold plate with an allen bolt in to act as a bleed to ensure that all the air is out and it works fine :-)
Kev
I ran mine with a golf header as Richard did.
Top hose to rad
Bottom hose to rad
Small hose on thermostat to header tank breather
Smaller hose on water pump to header tank bottom (filler hose)
Head outlet in middle of inlets was blanked off.
Never had a problem with air locks and always filled easily.
David
So,,,,,,
These header tanks in the water cooling sytem...
I see that some have a traditional pressure relief bayont cap (like the ones on radiators), which I understand relieves pressure and then will
effectively open a "vent" in the header neck, which I guess can go off to the atmosphere, or a expansion tank - if no exptank, could air not
be sucked back into the system when cooling.
Others, such as the Golf one seem to have a screw type cap, that does not have a pressure relief facility? Surely there needs to be some safety
relief device ?
Seems there may be many different ways of achieving the same result 
Have you got the dimensions for the polo rad.
i thought a header tank and expansion tank where two different things???
quote:
Originally posted by Rob Allison
Have you got the dimensions for the polo rad.