Son's 1973 Scamp project
There was an interesting development while filling the cooling system. We developed a slow leak out of the right front LA bolt hole on the SM aircrap intake. It's bolted on magnum heads so the LA bolt holes are unused for us. Hmmmm water. That's strange...........
Drained the cooling system had a look down that unused hole and immediately noticed some porosity in the casting between the intake bolt hole and the front water crossover. Uh oh. Bet there's a pin hole leak there. Filled it back up with water. Yup that's it. Now what do we do? Drain it again,
tap that hole NPT 1/4-18 pump it full of RTV plug it and rock on. That's what you do!
Sorry I forgot to get a pic of the bad spot inside the casting. But here's the after.
The offending hole and where about the internal pinhole/leak was. All better now.
Honestly, if I wasn't so lazy I'd take the SM intake off and send that sucker back for an exchange.
But I am. Lazy.
There was an interesting development while filling the cooling system. We developed a slow leak out of the right front LA bolt hole on the SM aircrap intake. It's bolted on magnum heads so the LA bolt holes are unused for us. Hmmmm water. That's strange...........
Drained the cooling system had a look down that unused hole and immediately noticed some porosity in the casting between the intake bolt hole and the front water crossover. Uh oh. Bet there's a pin hole leak there. Filled it back up with water. Yup that's it. Now what do we do? Drain it again,
tap that hole NPT 1/4-18 pump it full of RTV plug it and rock on. That's what you do!
Sorry I forgot to get a pic of the bad spot inside the casting. But here's the after.
The offending hole and where about the internal pinhole/leak was. All better now.
Honestly, if I wasn't so lazy I'd take the SM intake off and send that sucker back for an exchange.
But I am. Lazy.
