Alky!!!
Melting Slicks
Joined: Mar 2002
Posts: 3,426
Likes: 0
From: Toronto Ontario
Instructor
Joined: Apr 2002
Posts: 148
Likes: 0
From: toronto ontario
Tech Contributor
Joined: Jan 2007
Posts: 19,465
Likes: 1,167
From: Dyer, IN
What are you suggesting? The freezing temp of methanol is ~-130 degrees F. If the seals did shrink when dry, wouldn't it leak when you first filled it up new? I'm confused.
Burning Brakes
Joined: Jul 2004
Posts: 759
Likes: 12
From: Tampa Fl
The diaphram is not rubber. Its a material called santoprene. Excellent with chemicals. Rest is plastic.
Burning Brakes
Joined: Jul 2004
Posts: 759
Likes: 12
From: Tampa Fl
Tech Contributor
Joined: Jan 2007
Posts: 19,465
Likes: 1,167
From: Dyer, IN
If the alcohol doesnt have any contaminants you are correct. If it runs the chance of being contaminated, then by draining you dont soak it and run the risk of having a diaphram issue. I have had my reservoir filled while doing engine renovations for months at a time without issue. But this is one of those it cannot hurt if you wish to drain it. Just like storing a car for winter, draining the fuel system will prevent the fuel from going bad from moisture. This case both of you are correct, just on opposite sides of the fence.
Le Mans Master
Joined: Oct 2005
Posts: 7,088
Likes: 1,829
From: Metro Detroit Michigan
Lucky, I don't think anyone's suggesting that the methanol froze. Certain seals will swell when exposed to certain solvents. Then if allowed to dry, they can contract to a smaller than original size. That's what I was suggesting.
Julio has said that this won't happen with the seals in his current pumps unless they are exposed to something other than methanol and water.......gasoline for instance.
Julio has said that this won't happen with the seals in his current pumps unless they are exposed to something other than methanol and water.......gasoline for instance.
Last edited by Warp Factor; Jan 10, 2008 at 02:44 PM.
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Tech Contributor
Joined: Jan 2007
Posts: 19,465
Likes: 1,167
From: Dyer, IN
Lucky, I don't think anyone's suggesting that the methanol froze. Certain seals will swell when exposed to certain solvents. Then if allowed to dry, they can contract to a smaller than original size. That's what I was suggesting.
Julio has said that this won't happen with the seals in his current pumps unless they are exposed to something other than methanol and water.......gasoline for instance.
Julio has said that this won't happen with the seals in his current pumps unless they are exposed to something other than methanol and water.......gasoline for instance.
Thanks.