Eliminator28

Awwww ****....

Eliminator28

Got it out yesterday, and here's what I found










Took a big gulp of water, dropped #7 exhaust seat which disintegrated and went throughout most of the cylinders via the Intake manifold.... still trying to wrap my head around this one.

Gonna pull the lower end apart today..

Philm

Looks like it blew the headgasket between 5 and 7 also. Could just be the picture though.

JTeam

I once had a very similar issue. I found a hairline crack in the head between the valves.

blue thunder

The exhaust seat probably went first then the piston sucked water in around the exhaust valve. It doesn't look like it ran much with water getting in. I'm optimistic that your carnage will be pretty much what you are showing now.

Pismo10

So what is next? bore the block, new pistons, fix the head and you are good?

mike tkach

iTrader: (3)

+100 seen this happen before,happen,d to a buddy about 3 years ago,about 3 weeks before his annual boat vacation,we pulled engine,had block bored,new piston&rod combo balanced,and assemdled,and engine back in the boat and running about 3 days before he left,oh yea,i forgot to mention,we replaced the heads with edelbrock rpm marine heads.still running strong with no problems.

Eliminator28

Not yet, but It appears to have been trying. I'll be posting some very intriguing pictures of the Head gaskets up shortly, that will be very disturbing to some people.

This motor only had about 30 hours on it.

I sure hope not...

BINGO ... Winner

I think your right. It appears that I had a detonation problem as well... Seat may have been loose for a while, finally dropped out and jacked everything up. #7 piston is pretty thrashed, and is partially collapsed. The pin boss is partially collapsed because It takes a fair amount of effort to move the rod on the piston.

4 pistons need to be replaced, and I'm not sure if I can buy 4. might have to buy a whole set. I'll call SRP in the morning. #7 cylinder will have to be Sleeved. If I have to buy a whole set of pistons, I'll just bore it to .060 over and put it back together.

Heads will need to be milled more (already took .020 off them) to get rid of the debris field... and it might be a lot. and all this IF the head is not cracked, and another seat can be pressed in succesfully.




The pic below shows the burned underside of the #7 piston (left). All the others were clean as is the right hand one. HMMM!

Eliminator28

I hope it's that easy...

I spent $9000 rebuilding this motor 9 months ago... I'm hoping it can just be fixed this time

obnoxus

Yup,,,,dropped a seat,,,,, and you can blame the new ethanol fuel,,,,, I bet you fuel up on land right???.

everyone should bump up a jet or to that fills up on land