gripit

I was wondering if anybody knows what causes corrosion between Gil Exaust Manifolds and the Stainless Steel Risers?

Iggy

Looks like dissimilar metal corrosion.
When two different metals are joined, like the aluminum manifold and stainless riser, an electrical potential is formed causing electrolysis (corrosion).
Try running a ground wire from the riser to manifold then a wire to the engine block.

Pwrbt33

iTrader: (2)

Hi Evan, I have seen this happen when a sealer isn't used when installing the gaskets and moisture plate. I usually have to put a small thin bead around the inside flange on the top and bottom of each gasket and then install the risers.

John

DORaymond

gripit - is that a ground cable connected to the tailpipe studs?

gripit

Yes, it is a ground cable. Maybe the Ground cable between motors may be causing additional corrosion? What do you guys think? Has anybody else had a simular problem?

RonS

I believe that ground strap should be running from engine block to engine block