best replacment block

if compression test fails pull heads and have them magnafluxed. That will tell you if the head is craked. If the heads are ok more than likely the block that is bad. In my opinion.

But if you can't find the right help on this site, then I don't think you will find it anywhere else, because all these guys here are very sharp on their info.

If the compression test is not good then you don't know for sure if its the heads, could be a crack in the cylinder, blown head gasket, or possibly a crack in the heads maybe something else I am not thinking of that would put water in the oil and ruin compression who knows I am a bit hungover.. anyway if compression was good then you would be leaning towards exhaust manifolds again...

I'd do a lot more testing before I sprang for a whole motor or trashed the boat.

I haven't heard that you've done a basic compression test to see if you have a cracked head. My block and heads cracked over last winter. Which is to say that if your freeze plugs popped, it's not unthinkable that a head cracked. Which wouldn't be hard to replace and way cheaper than a whole motor.

Thomas

inboard 60 where in ark. does this newly acquired C/C reside............i am a resident of the state below you.sounds like Little Rock?...glad to have someone on board that is a little closer to La. lottsa good info to be found on this site,concerned about the metal tho,you should pressure test the manifolds before you buy new ones tho,real easy test.   boat dr

How handy are ya? You can most likely handle this project anywhere between 1000 dollars and a lot of work (if ya have the tools and space) and 7-8 k with the flick of a pen and a sharp pain in the wallet. If you want to take it on we can talk you through anything, if you want to get rid of it and buy something that works your also in the right place...

Not Afganastan as Keith has shown on my post. Arkansas about 1 hour from Memphis.

I just bought a pristine 86 silver nautique. Sat in a warehouse most of its life. My two teenage sons went and picked it up half way across the country and did a great job checking it out except they did not notice the freeze plugs had been popped and replaced. Well I took it out for about three weekends kept the oil checked and no sign of water on the dipstick. Took it out last week and changed the oil finally. Drained water out and then the milky oil.

My question is what to do? Buy new GT 40 complete and really have a unique boat, get a Jasper reman or maybe a First mate reman. Watch ebay all winter and pick up a salvage. Also there were metal filings that came out of the oil filter. Some of you have been there. Maybe someone would like to have a pristine 86 silver project. Help!!!!