Overflow tank options.

[canadian]

In an effort to move parts from the attic to the truck, I'm in a situation where I need to move my overflow tank. This is part of a snowball situation. Over the years I managed to get two different styles of tanks.

Tank 1:

Tank 2:

The benefit of using the first tank is that I can take the top off to check the level in the tank. The drawback of it is that since it was originally designed for fuel, there is a seal at the top of the tank. I'm worried that with this seal, when the thermostat opens, it will build up enough pressure in the tank that the coolant overflow won't be able to enter the tank and a hose may blow off.

The benefit of tank 2 is that I can feed into the bottom and leave the top open to vent pressure. The drawback is that I can't check the level in the overflow tank. There is no hose going from the top inlet to the bottom of the tank, so there would be no real way for the coolant to be drawn back into the radiator when it cools down if I fed into the top of it.


So my question is if it's a good idea to use tank #1? I could drill a few small holes in the cap to help vent the pressure or in the top of the tank itself. I just don't know if the pressure build up would be enough to worry about.

Anybody have any opinions or ideas? You can see more photos in my PhotoBucket album.

 

[Quickstop [UK]]

Re: Overflow tank options.

The coolant overflow is designed to allow pressure to be released so I wouldn't want to have a system where the pressure was maintained. Why would you need to check the volume in the overflow though?

If the truck pukes coolant, it's full. If the truck has a full rad, it doesn't matter what is in the coolant overflow surely?

I'd be inclined to use tank 1 with some holes in but it seems a shame to have to do that. Tank 2 should suffice.

They do both look quite small though. I have the coolant overflow from the ALKYCONTROL kit and it is too small. I need another in series or a different, larger tank. Might be worth thinking about. :2cents:

 

[Static]

Re: Overflow tank options.

Im using tank #2. I have the overflow hose coming in from the bottom so it will pull the fluid from the bottom when the truck cools. I ran another hose off the top down underneath the truck in case it gets too full.

 

[Daryl H]

Re: Overflow tank options.

You can always drill and tap a vent (barb hose) fitting to the top corner of the #1 canister.

 

[bezerk]

Re: Overflow tank options.

well, i have 1 i think.

but as far as a feultank not breathing......wouldnt it get vapor locked if it was sealed that well?

 

[canadian]

Re: Overflow tank options.

well, i have 1 i think.

but as far as a feultank not breathing......wouldnt it get vapor locked if it was sealed that well?

These are both gravity feed types, so if the pressure built up in the can it would just push the fuel out the bottom with more pressure. The fittings are pressed in through a rubber grommet. I have a feeling that would leak before fuel vapor came out the top.