Who on Long Island should i bring my Gilll exhaust manifolds to have them pressure checked for leaks?

Connect the garden hose and plug the rest of the holes, should be enough pressure to see if there is a leak.

Most of the time they will leak externally around the core plug areas it will first appear as a blister in the paint. They can be repaired but it's not a fun job. If you find that yours are leaking I might be able to help I have 2 extra sets if your interested.

Most importantly you need to check your tailpipes, they are prone to cracks inside around the welds. Sometimes you can't tell they are leaking or have a crack until you hit it with a torch to expand the stainless.

Muff, thats exactly whats happening with mine. I suspect a leak after tearing down motor and found signs of water in one cylinder. Ring was frozen to piston. I am building completely new so i am not concerned with the internals, but i was hoping to save some money and reuse my old exhaust. Do pressure checks always give accurate results? Are your exhaust new? I may be interested.

Muff, i bought my boat from Plukebaum yachts in Prospect, KY. Its a 38' Scarab. By chance, do you know the boat?

brought them to a radiater shop today and they pressure checked with air and dropped them in a tub of water. They not only bubbled through the freeze out plugs, but we found a nice crack on the inside. Guess i wil be shopping for 2 sets of CMI's. Are my Gills worth any $$ in their current form?

How do you seal off the outlets of the tailpipes to pressure check them?

the shop had all types and sizes of rubber plugs available

They are worth 55 cents apound for scrap sorry!