biglakeexile
New member
"Ok, I just got a deal on a 78
"Ok, I just got a deal on a 78 Sea Ray because the motor is bad. Being a gearhead, and also boat mechanic long ago i took on the challenge. After getting the boat and finding the motor wouldn't spin I pulled the spark plugs and found water behind cyl. 2, which had been in there for presumably 7yrs. Previous owner said it ran fine in 2001. So i took off the intake and heads and found heavy rust in cylinder 2, the intake runner of the head and through the intake into the other head. Naturally before I do repairs I want to know where the water came from. I have three possibilities I think, exhaust man., cyl head and or gasket, or even the intake. I took both exhaust manifolds while loose and attached a garden hose, no water into exhaust chamber. Also, there is no rust in exhaust ports of manifold or heads, which makes me think that wasn't the waters path. Looking at the head gasket remnants I see no obvious signs water leak. I also couldn't find a leak in the intake by filling the water jacket and watching for water leaking into the intake runner. Also, Cylinder 3 shows previous water damage but apparently it ran after that and cleaned it up a little. The intake on this guy connects cyl 2 to 3 across the motor. What do you guys think? I wonder if i could upload pictures of it here."
"Ok, I just got a deal on a 78 Sea Ray because the motor is bad. Being a gearhead, and also boat mechanic long ago i took on the challenge. After getting the boat and finding the motor wouldn't spin I pulled the spark plugs and found water behind cyl. 2, which had been in there for presumably 7yrs. Previous owner said it ran fine in 2001. So i took off the intake and heads and found heavy rust in cylinder 2, the intake runner of the head and through the intake into the other head. Naturally before I do repairs I want to know where the water came from. I have three possibilities I think, exhaust man., cyl head and or gasket, or even the intake. I took both exhaust manifolds while loose and attached a garden hose, no water into exhaust chamber. Also, there is no rust in exhaust ports of manifold or heads, which makes me think that wasn't the waters path. Looking at the head gasket remnants I see no obvious signs water leak. I also couldn't find a leak in the intake by filling the water jacket and watching for water leaking into the intake runner. Also, Cylinder 3 shows previous water damage but apparently it ran after that and cleaned it up a little. The intake on this guy connects cyl 2 to 3 across the motor. What do you guys think? I wonder if i could upload pictures of it here."