CMI Header leakage
 

Rubber hose which transfer cooling water from manifold to the tail pipe does not leak water it comes somewhere else...

What is the leak and where it can come ?

http://www.youtube.com/watch?v=3GNR0SqPm2A&feature=plcp

it looks like either the header or tailpipe has a leak,if it is leaking out,it may also be leaking in,id pull the exhaust off and pressure test it before engine damage happens.

+1
You have an internal leak in either the header , the tail or both. I had the same issue last year. I was able to tig the leak in the tail but not the header. Had to get a new set.

They crack in the internal welds.

I just had several headers and tailpipes repaired for a customer after a pressure test failure

Ok, there must be the internal leak.

Can the exhaust manifold leak inspect by taking of that rubber pipe and put air pressure to hose inlet to the manifold ?

If the clamp between the header and the tailpipe is not making proper seal it will pull water backwards and leak. I had this same issue, my headers were not leaking. I added an extra gasket in-between and fixed the problem, been running ever since.

fixx
 

its much safer to remove the header so you dont pump water in the engine..if your still using the boat when you stop and shut the engine off pull that plug at the end of the hoses that feed the header water..this way it wont leak into the engine..

That clamp leaking also, so it could be that.
first need to seal that properly.

Tailpipe are 15" long. Should the water comes out back of tailpipe.
If so its long way to come backwards just thinking..
but anyway will seal the clamp.

Sucks, seems to be a bigger problem with CMI stuff also.



John jr

Pressure tested header today, no leaks there :)

It must be header and the tailpipe rope seal..