Coolant Overflow tank question

[Sasha Rudolfski]

I got this motion pro overflow tank and I am seeing that it is not completely air tight.  Does that matter?  I know coolant won't leak the way its mounted but I am wondering if I should bother with sealing it up or just run it how it came?  

 

I put some flex seal tape on it but not well enough to seal it up 100 percent

Edited November 18, 2018 by Sasha Rudolfski
Pics

[38super]

Air tight is better, overflow fluid will siphon back into the rads.  Otherwise, check your rad coolant levels before a big ride.

[Juney]

I'm not sure what you mean by air tight. The overflow needs to have a vent to release the displaced air when the tank starts to fill with fluid.

If the air can't escape, you're basically making a bomb filled with billing toxic Kool aid.

When the motor cools back down, the radiators can suck the liquid in the tank back up as the pressure in the radiators drops

[mlatour]

Exactly,

as long as the radiator cap is of the return type and, the overflow tube always submerged in coolant, 

what was expelled when hot will get siphoned back into the cooling system on cooldown.

 

Overflow tank not to be confused with an expansion tank as seen on many late model automobiles which, operates under pressure.

 

 

[ohiodrz400sm]

As long as your return hose stays under the coolant it will pull it back. I set mine up a little differently. Breather in the top center but the feed from the radiator is at the bottom of the tank.

 

For those not familiar the tank comes with 2 undrilled hose nipples. 1 on top and the other on the bottom. You choose which you want to use and drill the nipple open.

 

 

 

 

[JVP]

A better option:

https://www.ebay.com/itm/DDR-Coolant-Recovery-Overflow-Tank-2-4-Stroke-MotoX-Motorcycle-ATV-Dirt-Bike/183455485575?hash=item2ab6cc8e87:g:zLgAAOSwDkBbq-ET:sc:USPSFirstClass!91941!US!-1:rk:2:pf:0

 

[ohiodrz400sm]

A better option:
https://www.ebay.com/itm/DDR-Coolant-Recovery-Overflow-Tank-2-4-Stroke-MotoX-Motorcycle-ATV-Dirt-Bike/183455485575?hash=item2ab6cc8e87:g:zLgAAOSwDkBbq-ET:sc:USPSFirstClass!91941!US!-1:rk:2:pf:0
 

$35 for a premade Turkey baster mod?
Goes to show how lazy some people are.

[Sasha Rudolfski]

I used RTV and sealed the feed / return last night before i got the replies.  Check out my setup - any issues?

[Sasha Rudolfski]

Placement is messed up with the horn bracket flipped gas tank and shrouds dont go on.  If i remove my fan - i just unplug it and tuck the coupler and thats that? 

[mlatour]

I know space is limited but I'd find somewhere else to mount it,

anything added to the front/back of a radiator severely reduces the airflow thru it. 

[danfarson]

2 hours ago, mlatour said:

I know space is limited but I'd find somewhere else to mount it,

anything added to the front/back of a radiator severely reduces the airflow thru it. 

Why not use the OEM overflow plastic container, in the original location?   

[Sasha Rudolfski]

15 minutes ago, danfarson said:

Why not use the OEM overflow plastic container, in the original location?   

Yes, back to OEM coolant overflow.  wasted major time on fiddling with this for nothing but fiddles sake. Somehow the DRZ just sucks me into this black hole time warp.  

[Old Fart Syndrome]

Sasha do u live in WF? I know a Sasha there, and it is a rare name.