Page 1 of 1
Porous cases fix
Posted: Thu Apr 11, 2019 8:12 pm
by thirdstone
I was having problems with some older modified Wombat cases failing leak down checks. Air was slowly coming out through the metal near the transfer tunnels . I read up on this and it seems it was common back in the day on other engines even going back to WW2 aircraft.
They use to fix it with a pain like product.
Got me thinking , I used a tank rust repair sealant like that used inside fuel tanks . Worked a treat.
Re: Porous cases fix
Posted: Fri Apr 12, 2019 12:31 am
by taber hodaka
Are you saying air was coming through the aluminum cases?? -----------Clarence
Re: Porous cases fix
Posted: Fri Apr 12, 2019 4:41 am
by thrownchain
I believe they used to use a product called Glyptol, which was red in color, used to seal pourous metals.
Re: Porous cases fix
Posted: Fri Apr 12, 2019 8:12 am
by thirdstone
taber hodaka wrote:Are you saying air was coming through the aluminum cases?? -----------Clarence
Yes
Re: Porous cases fix
Posted: Fri Apr 12, 2019 8:16 am
by thirdstone
thrownchain wrote:I believe they used to use a product called Glyptol, which was red in color, used to seal pourous metals.
Yes Glyptol was one of the products used years ago and is still available. From what I could work out it was used in oil pans but I couldn’t work out if it was fuel resistant. One message board thread I read says it wasn’t so I didn’t use it.