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Milk shake

2.2K views 39 replies 17 participants last post by  mercrewser  
#1 ·
Brought my dads jet boat home to start working on it this weekend. I got it running after 2 years of sitting outside and it ran like a dream. But after shutting it off I checked the oil and it looked a milk shake. :shocked:
1) Could enough condensation have gotten in the oil from sitting outside for 2 years or do I have a bigger problem?

2)Whats the best way to flush this crap out?

3)Motor runs awesome so I have a hard time believing its something serious. Will be doing a compression test tonight.

Whats your opinion?
 
#6 ·
My dad said it had antifreeze in it but the drain plugs were NOT in the block.
No I didn't change the oil before I fired it up,but it's drained now and I am going to run some new oil through it tonight with some sludge remover and drain it again.
 
#8 ·
A true leak-down test will tell you lots more that a compression test if you can get hold of the equipment. And a coolant leak from intake to block will let water into the lifter valley area (and then to pan) and that will not be found with either of those tests. --- Jer
 
#9 ·
I assume the motor was covered while it sat. Based on this assumption I dont think you could get that much condensation. It it was not covered or there is an air scoop next to the carb you could get rain water or snow in the motor.

Either way you need to run it and keep changing the oil until it gets clean. If it doesnt get progressively cleaner you have another problem. A leakdown test is the way to go if you have the means then you will hear the air escaping if it is. I sometimes just use the spark plug adapter to pump air (from compressor) and listen to where it is going. A stethescope is handy for this if you don't know what you are listenening for.

chevy57
 
#10 ·
chevy57 said:
I assume the motor was covered while it sat. Based on this assumption I dont think you could get that much condensation. It it was not covered or there is an air scoop next to the carb you could get rain water or snow in the motor.

Either way you need to run it and keep changing the oil until it gets clean. If it doesnt get progressively cleaner you have another problem. A leakdown test is the way to go if you have the means then you will hear the air escaping if it is. I sometimes just use the spark plug adapter to pump air (from compressor) and listen to where it is going. A stethescope is handy for this if you don't know what you are listenening for.

chevy57
It only had one of those cheap blue plastic tarps and that was taken off back in early May so from then on its been exposed to the weather. It also has a Mr. gasket street scoop to cover the carb and thats it.
Here is a pic so you have a better idea.
 

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#12 ·
It may take many oil changes to get rid of the milk. Here is what I do:

1. drain milkshake,
2. replace oil filter w/cheapest one you can find,
3. dump about 2 gallons of diesel in crankcase,
4. circulate diesel w/oil primer rod and drill for a minute or so.
5. drain, and repeat steps 3 & 4.
6. replace cheapo filter with a good quality one, fill with oil and go.
7. change oil after few hours or so.

I have done this enough now to know that it will cut just about all the water out of the engine and oil. the little that is left will evaporate once engine is up to temp.

Do you know if the exhaust was drained prior to storage? If not, I would definately say that is where it is coming in. If drained, it is still a highly likely cause.
 
#14 ·
cuda said:
Run it with half diesel and half motor oil for a couple minutes. It will cut the emulsified oil, usually in one shot. If you have water after that, you need to look farther.
I was also told to run some kerosene through it. What do you think and how much should you use mixed with the oil.
I'm going to pull a valve cover at lunch and see what she looks like inside.
 
#15 ·
Kerosene and Diesel #1 i beleive are pretty much the same , Diesel #2 is what you will find most of the time at the pump...but if you can find Off Road Diesel its cheaper{tax free road tax that is}but its got red dye in it ,dont put it in your fuel tank if you got a deisel rig you will never get the red out of your system, D.O.T checks for red dye.
 
#16 ·
Bad news. Cracked block or blown gasket. Tear down and check. if you run it anymore you will destroy what you have left. These engines are frsh water and do not use antifreeze.Never seen a good outcome when you have milky oil.
SORRY to be the bearer of bad news.
 
#18 ·
Rattlesnake Jake said:
Could be the intake gasket.. I blew one a while back, made a milk shake.. Changed the oil & filter with cheap stuff 4 times. Then put in the good stuff.. Been fine since..
Yep Jake; I thought that is just what I said in post #9 here. Guess everyone missed it. --- Jer
 
#19 ·
Rattlesnake Jake said:
Could be the intake gasket.. I blew one a while back, made a milk shake.. Changed the oil & filter with cheap stuff 4 times. Then put in the good stuff.. Been fine since..
I was gonna suggest check this too, or at least retorquing the bolts. I had some intake bolts come loose on my old boat. Instant milkshake. Took em out put a dab of locktight on them, and retorqued. Good ever since.

I look forward to watching your progress. I've always wanted to do something like what your doing. Good luck with it. :)
 
#20 ·
If the problem continues after fresh oil.

My buddies Ford jet boat was leaking inside the timing chain cover, difficult to find. Pull off the plate with the two water inlets and look for corrosion in the bottom corners.
 
#21 ·
speter4205 said:
I was gonna suggest check this too, or at least retorquing the bolts. I had some intake bolts come loose on my old boat. Instant milkshake. Took em out put a dab of locktight on them, and retorqued. Good ever since.

I look forward to watching your progress. I've always wanted to do something like what your doing. Good luck with it. :)
I almowt forgot,on the bell housing hole that is directly below where the intake and head come together I saw some milk shake oil oozing out slightly. I removed these bolts to remove the ski pylon. So I wonder if the intake is leaking? :confused1 But wouldn't it run crappy?
T :confused1 The engine runs great.
 
#22 · (Edited)
My 350 Ran great, even though these 2 bolts were loose. And they were LOOSE. I took them out with my fingers. Tighten em down, and flush the crappy oil out, and run it and see if the problem goes away. :blush:.


I'd also do a leak down test if you have the means. if not a compression test. :)
 
#23 ·
speter4205 said:
My 350 Ran great, even though these 2 bolts were loose. And they were LOOSE. I took them out with my fingers. Tighten em down, and flush the crappy oil out, and run it and see if the problem goes away. :blush:.


I'd also do a leak down test if you have the means. if not a compression test. :)
Did a compression test and all cylinders were between 110-120lbs. Is that normal for a 460 or is it low? I am not a Ford man so I can't really say,but it seemed low since my engines in the Dominator are 150-160. :confused1
 
#25 ·
cuda said:
I usually run half oil, half diesel, or thereabouts. It isn't critical the mixing. I done it several times. I'm betting it's nothing serious, more likely a result of sitting so long.
I pulled the valve covers at lunch today and expected to see a froth all over everything. What I saw was nothing. Heads were clean with the exception of some small traces of water and the underside of the valve covers were spotless. So I have filled it back up with straight oil,changed the filter and will re-torque the intake and see what happens after letting her run for about 20 minutes or so. :confused1
 
#26 ·
No matter what you are goign to have condensation. Look valve covers and other billet, alumnium metals start to iodize from condensation., Same with the gas tanks, so why would a motor be different. The diesel thing works great, that stuff will clean anything. I think you should do that run some cheap a$$ oil through it for a few minutes. Then replace it and see what the out come is. A friend of mine had this problem went through 3 468's intil he found out the water was going into the motor from the exhaust.