need help interpreting results of manifold pressure test

[boatgrunt]

I have a 1989 OMC Chevy 4.3 V6 with a small amount of water in my port-side cylinders. The 1989 OMCs have large, 1 piece cast iron manifolds. See picture:<br /><br />

<br /><br />I removed the port-side exhaust manifold, blocked/sealed off the exhaust exit and pushed water into the intake hole. The three passage ways that carry the exhaust gases out of the engine filled up with water in about 5 seconds. This means that the exhaust manifold is cracked - right?

 

[boatgrunt]

Re: need help interpreting results of manifold pressure test

picture: http://i-netmarine.com/manifolds/omc_43l_v6_chevy_cobra_1_pc.htm

 

[Haut Medoc]

Re: need help interpreting results of manifold pressure test

Yup.... ....JK

 

[KaGee]

Re: need help interpreting results of manifold pressure test

Oh ya. Sorry, but that's not good.<br /><br />If you boat in salt water up there you have about 4-5 years life expectancy on those.<br /><br />GLM introduced a replacement for those. They were to be available in Late August/early September. They would be way cheaper than the originals.