460 Milkshake!!

[Hallett19]

..... and it was running so well!!
Ran out of gas on tank 1, went to switch to tank two and I see some milky oil on the valve cover :mad: Pull the dipstick and pulled out a cafe late. It actually was not too bad, it wasnt full of water but small traces of milk on the dipstick... I also had a significant amount of water in the transom, like WAAAYYY more than normal!
So I have a few questions for you guys, it had been over a year since I had even started it, could water have accumulated in the motor? There does not appear to be a whole hell of a lot of water in it at all. I know it could be 1 of many things, front timing cover, head gaskets, intake maniford gasket, cracked block, cracked head, etc, etc. Where do I start?

[78hallett-ss]

if its just in the valve covers dont sweat it... condensation can build in there...

[Hallett19]

There was some leche on the dipstick though :(

[GottaJet]

I had the timing cover issue. A small hole in one of the little corners I almost didn't see it. Changed the cover and no more milkshake knock on wood :hammer2: just my .02

[UltraJet]

Not sure what kind of setup you have but if you are running OT headers with a basset T valve the valve itself could be the problem. It might just be a simple plumbing problem.

[Hallett19]

Nope, running Holman Moody logs. I'm going to pull the timing cover first and look for wear/corrosion and move on from there.

[H20MOFO]

Compression check?

[Hallett19]

Compression check?
If the timing cover looks good that is the next thing I will do, that might help decipher whether its a head gasket or not, ha?

[H20MOFO]

Thats what I was thinking.

[asch]

You need to run a leak down test. That'll tell you if there's a problem. Compression test alone won't do it. Either way, get that oil out of the motor. Change it a couple times or more if necessary. It's probably nothing big.
Good luck

[oilfieldtrash]

how much water was in the boat?
I had my bilde pump go out last year and by the end of the day i had alot of water in the back of the boat than usual and it went threw the dip stick opening in the pan and made me a milkshake as well. just my 2cents

[jetboatperformance]

Lots of possibilities and solutions , is this a fresh motor ? what cam (specs) do you have exaust flappers on you tips ,the more info the better Happy to help Tom

[Hallett19]

Motor has 4-5 seasons of very light use on it. Cam is a very conservative Isky A cut impeller cam. Exhaust logs have the flappers intact on each side. I do not have a water press. regulator or a t-stat so its runs whatever block pressure the jet throws at it and water temps never really gets over 110-120 degrees at cruise and 150 degrees at idle. Oil temp can get up to 290+ however on a good wide open cruise.

[DK_Hallet]

Check the ol freeze plugs. I had one get a pin hole and squirt right into the dipstick hole . Look for some rust on the plugs, any and you have some water in that cylinder.