I like the design of the overflow tanks found in

the later volvos. As far as I can tell, the only

modifications I would need to make to use one on

my 164 would be to find a place to mount it on

the fender (no problem, really) and to put a hole

in the bottom part of the radiator for the lower

hose to mount. A drill, a brass fitting, and some

solder ought to take care of that part.

There may be a couple problems -- the relief

caps may be the wrong pressure for a 164, though

I've had my radiator and hoses tested to a pretty

high pressure (the shop said that it was actually

about as high as modern cars run, and he was a

bit surprised that it didn't leak) and it could

have the wrong dimensions causing it to overflow

when the system pressurizes.

At the moment, I have a 140 overflow tank with

the correct cap and I also have a 164 overflow

but no correct cap and the tank is kind of

cracked in a couple places with JB weld repairs.

The 140 tank is too small when the car is

working hard, but otherwise keeps the system

pressurized. I could get a replacement 164

tank but the later 240 tanks seem like a real

improvement. Plus, it seems like I'd have an

easier time finding replacement parts later if

I need them.

Opinions?

chris