For those of you keeping the dual thermostat on the
20b and using the stock cover, I just wanted to ask
where you are putting the "highest coolant fill location"
I was thinking of putting a fill / expansion cap on the
pipe of the stock cosmo stat cover, but was looking and
there isn't enough room under the hood.
So where are people putting the highest fill point?

matt

 

The stock cover isn't going to fit unless you have a custom hood with a huge scoop or bulge for clearance.

SPiN Racing made me a custom billet aluminum dual thermostat housing with the filler cap on top. The TII hood interior required just a little bit of cutting to make it fit. Here are some pictures of the housing in the rough:
http://home.tampabay.rr.com/spinraci...tor/index.html

 

evil> i have already cut the hose fitting off and flipped
it over on the stock dual thermostat cover,
so it fits under the stock TII hood now, but there is no
room above that pipe for a rad cap, i just want to find a
way to fill the cooling system to the highest point,,,
the thought of using a rx2 pressure overflow, comes to
mind then i would only have to weld on a little pipe to
that cover. only problem is i don't think i have a rx2
tank left anywhere
I am just thinking that if there is a place in the cooling system
for expanding coolant to exit it should be located at the
highest point in the cooling system,,, no?

matt

 

you can kind of see in this picture from 3rotor.us site
what i am thinking of doing but i dont think there is
room under the stock hood.

 

hmmm the more i look at this the more i think it might
fit....

 

i had the valve thing cut off mine (it was bad anyways) and replaced with a radiator cap http://www.2751engineering.com/20B_2.jpg
it fit under the hood with a little cutting and its also the highest point in the system, i just have to get the hose elbow cut and rewelded at a better angle so it clears

mike

 

Mike i was thinking of doing that as well but the cover
i have is in good working order,,, so far that is, the heat
from welding on it might just do in the diaphragm.
will solve the problem this weekend no matter what,
I want to get this thing done!

matt

 

so you tested that valve thing and it worked? ive tested 3 and they were all bad so far

mike

 

I have 2 covers one leaks and te other is like new, i could make one like you have and another like stock but i think i have an idea

matt