p4-33

Hey guys,

Running pretty hard today, and lost a motor. Pulled the spark plugs and a good bit of water drained out cyls. 4, 6 & 8. Much oil in pan, too. Probable head gasket, maybe head crack.

It's on an engine stand now, but haven't dug into it yet. While I'm in there, any advise on what to look for? What's the chances that my lower end is still intact? How do mains and rod bearings like water? Seems to turn over ok by hand with plugs out.

It's an HP500, carb.

Don't ya just love fast boats?

Thanks in advance!

Brian

p4-33

Correction, make that much water in the pan.

Brian

seabeach

I would also take a look at the exhaust and do a pressure test. When there is a leak between the riser and mainfold the first cylinders to take in water are 4 and 6, then ....

I would take a good look at the rods and the crank, It is very hard to compress water so in almost all cases the rods and crank are damaged.

/T

jpclear

Depends a lot on just how you "lost a motor". If it just got hot and quit and you didn't try to restart and continue running, then the chances are pretty good that you didn't damage the lower end. Get it drained and flushed NOW! If you did get real hot and you have cast iron heads, you can pretty much count on the even side being cracked. You can flush with fresh oil by pulling the dist. and driving oil pump with a drill motor and the proper adapter tool. Hope your troubles are minimal. --- Jer

Crazyhorse

Crank bearings don't like water one little bit, and if it were me I'd take the time to spin the engine belly-up on the engine stand to pull the pan and check at least one main and one rod bearing (at the front of the engine). cam bearings aren't all that fond of water either, so if you've got lower-than-normal oil pressure when you get it running again it's possible that the cam bearings are a little looser than before, allowing oil to sneak out past the cam journals.

p4-33

Not good news...

Looks bad to start

p4-33

Gets worse...

Detonation in #8, valve damage on #6

p4-33

And for good measure...

Cracked head... Looks like Eastlake isn't going to happen next weekend.

bobby daniels

let me know what you need I most likly have good used heads or new parts ,was that a efi motor ??

p4-33

Hi Bobby,

Yep, I'm going to need a head. It's an HP500 carb motor. I'll get the block to the machine shop tomorrow morning to have them mic out the cyls, and figure out what size pistons I'll need. I don't know if it's ever been bored, or whether it needs it now.

I'll be taking a good look at the bearings today to see what they, and my crank look like.

Let me know if you have a head, and some details about what it is.

Thanks,
Brian