Hey fellas, been a while.
I am currently helping a friend get his new aquisition ready for the season. 1977 898 Chevy 305. Long story short, we got it running and while running on the muffs it fills the crankcase with water and eventually blows chocolate milk out both valve cover breather holes, and out the lower unit, which produced a really great sheen of oil/water on my concrete driveway. My friend is frustrated and ready to give up, but I want to help because I'd like a boating partner. Our two modest families get along together well. He doesnt have a lot of money to spend, so what I can get him to spend on it needs to be spent wisely. I have suggested replacing the long block entirely, but he cant afford that. So the next option is to try to determine where the water is getting in, and go about the process of fixing it.
We know without a doubt that the engine had always been winterized properly, and while it was running I detected no leaks around the usual exterior locations of freeze cracked blocks. I understand the block may be cracked internally. My suspicion is either intake gaskets, or head gaskets, or both. Possibly a cracked head, or both. I do not believe the engine has ever been overheated, but heads do crack for other reasons.
So I'd like to get any ideas from you guys (or girls) based on what happened as to what THE MOST LIKELY cause is. I understand there are many causes for milky oil, but we dont have a lot of money to spend and my friend deserves a boat as much as anyone. So we will start with the most likely and go from there. I am hoping to draw from the tremendous amount of experience on this site from people who have had similar situations and what fixed their problems.
I will say I have some experience with milky oil on an old '77 888 ford 302. Leaking intake gasket was the culprit.
Thanks, Tommy
I am currently helping a friend get his new aquisition ready for the season. 1977 898 Chevy 305. Long story short, we got it running and while running on the muffs it fills the crankcase with water and eventually blows chocolate milk out both valve cover breather holes, and out the lower unit, which produced a really great sheen of oil/water on my concrete driveway. My friend is frustrated and ready to give up, but I want to help because I'd like a boating partner. Our two modest families get along together well. He doesnt have a lot of money to spend, so what I can get him to spend on it needs to be spent wisely. I have suggested replacing the long block entirely, but he cant afford that. So the next option is to try to determine where the water is getting in, and go about the process of fixing it.
We know without a doubt that the engine had always been winterized properly, and while it was running I detected no leaks around the usual exterior locations of freeze cracked blocks. I understand the block may be cracked internally. My suspicion is either intake gaskets, or head gaskets, or both. Possibly a cracked head, or both. I do not believe the engine has ever been overheated, but heads do crack for other reasons.
So I'd like to get any ideas from you guys (or girls) based on what happened as to what THE MOST LIKELY cause is. I understand there are many causes for milky oil, but we dont have a lot of money to spend and my friend deserves a boat as much as anyone. So we will start with the most likely and go from there. I am hoping to draw from the tremendous amount of experience on this site from people who have had similar situations and what fixed their problems.
I will say I have some experience with milky oil on an old '77 888 ford 302. Leaking intake gasket was the culprit.
Thanks, Tommy
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