Whats this port for?

Simeon · Post by **Simeon** » Sun May 23, 2010 8:35 pm

Excuse my numptiness

On the Offenhauser manifold there is a port about 3/4 diameter just above the heater port. What's it for?

JSF55 · Post by **JSF55** » Sun May 23, 2010 10:19 pm

Water temp sender ?

Simeon · Post by **Simeon** » Mon May 24, 2010 6:57 am

Thanks, but it already has one at the other end.

ged · Post by **ged** » Mon May 24, 2010 7:15 am

If it's the one at the back of the manifold it's a vacuum take off for your brake servo.

Simeon · Post by **Simeon** » Mon May 24, 2010 7:17 am

Thanks Ged,
For my kit car then, it needs blanking off. Any idea of the thread size?

ged · Post by **ged** » Mon May 24, 2010 8:48 am

I think it's an oddball (non standard)! The O.D. is 0.617" & 18 TPI so possibly American National Pipe Parallel derivative. Trouble is I can't find any more info on it. Looks like you may have to get one made.

Doh!! just realised it's 5/8 UNF. Also this is in a JWR Offenhauser manifold so may not be the same.

Regards Ged.

Simeon · Post by **Simeon** » Mon May 24, 2010 12:02 pm

Thanks again Ged

Mines a JWR Offenhauser aswell so i'm off shopping again.