"Hi, I have a 97 5.7 PCM SLL
"Hi, I have a 97 5.7 PCM SLL high torque 350 in a Shamrock. The engine has 1400 hrs. and has been in salt water since new. The problem I am having is that there is water in the oil.
I originally thought it was the intake manifold gaskets leaking so I removed and installed new. I’m still getting water in oil. I removed the oil cooler and pressure tested it, it was fine.
I did a compression test and all was fine. With plugs out a visual inspection indicated one plug had small amount of rust or orange stain. I’ve seen plugs when salt water gets on them and this is no ware near the same. An automotive machinist told me to check under the intake manifold for cracks in the block, it all looked good. Is it possible that the engine being salt water cooled (even though it was flushed every time it was used) that internally it is rusted through? Will the heads rust through before the block? Is there any way to pressure test the block and the heads at the same time? Oh incase you are wondering I changed the oil and filter @ least 4 times before using the boat, only to find after a couple of hrs. used more water in oil. Great site, hope you guys can help, thanks."
"Hi, I have a 97 5.7 PCM SLL high torque 350 in a Shamrock. The engine has 1400 hrs. and has been in salt water since new. The problem I am having is that there is water in the oil.
I originally thought it was the intake manifold gaskets leaking so I removed and installed new. I’m still getting water in oil. I removed the oil cooler and pressure tested it, it was fine.
I did a compression test and all was fine. With plugs out a visual inspection indicated one plug had small amount of rust or orange stain. I’ve seen plugs when salt water gets on them and this is no ware near the same. An automotive machinist told me to check under the intake manifold for cracks in the block, it all looked good. Is it possible that the engine being salt water cooled (even though it was flushed every time it was used) that internally it is rusted through? Will the heads rust through before the block? Is there any way to pressure test the block and the heads at the same time? Oh incase you are wondering I changed the oil and filter @ least 4 times before using the boat, only to find after a couple of hrs. used more water in oil. Great site, hope you guys can help, thanks."