My Perkins 4-108 has a cast aluminum exhaust manifold. I have it off
for inspection and pressure testing. As part of the inspection, I have
remove all paint and primer to bare metal. Other than aesthetics, is
there any reason to repaint.

Ron

Unusual - most Perkins water cooled exhaust manifolds are cast iron.
The intakes are alum.


On Sun, 19 Oct 2003 12:06:43 -0400 (EDT), (Ron
Thornton) wrote:

My Perkins 4-108 has a cast aluminum exhaust manifold. I have it off
for inspection and pressure testing. As part of the inspection, I have
remove all paint and primer to bare metal. Other than aesthetics, is
there any reason to repaint.

Ron

Baja,

I was kind of surprised by that too. Both manifolds and the expansion
tank are definitely AL, I can cut them with a knife and they react to
phosphoric acid in the proper way. They seem to be holding up well.
There were a lot of variations on these engines over the years.

Regards, Ron