455 water in oil

[77taylor]

Hello, i bought a 77 taylor with a 455 olds, freshly rebuilt with an oversize cam. 100 hrs and its was getting water in the oil, i replaced all the gaskets and no help. I assumed a cracked block. So i purchased a second motor and i now have the very same problem. I have a berkeley jet drive no water pump on the motor. Could it be my water jackets? I connected the water jackets cooling lines together and hooked up the hose. no sign of water out the exhaust? im stumped the guy i bought the motor off of swears up and down theirs no problem with the new motor.

[mr curious]

cracked head maybe

[77taylor]

no i dont think so the motor was just rebuilt, and besides the last motor had the same problem. Can i have that bad of luck?

[Jango]

I believe, if your cam shaft has too much overlap with stock type exhaust manifolds, it is posible to get water into the motor thru the Exhaust valves.
See :
http://findarticles.com/p/articles/mi_m0BQK/is_1_8/ai_96379178

[77taylor]

The last time i took it out i gained about half a quart in 30 minutes.

[Markster]

While you probably solved the water in the oil issue by now, I had the same problem. Had the head magnefluxed and was told no cracks. Turned out it was a cracked head. Found the crack by removing the valve covers, taking off the water lines where the hose goes into the riser and then crimping and clamping the water lines so as to stop the water from exiting the engine. Then connected a water hose to the engine (like I was going to run it on land), and with the engine off I turned on the hose. Nice 80 lb or so pressure test. Leak showed up right away, dead center on one of the heads. Would not have seen the crack without the water test.

Water in the oil also caused a spun bearing earlier.

[ABBOTTCRAFT]

My money's on an "Intake Leak"...It happens alot.. Are you useing the rubber end gaskets supplied in the gasket set... If so, that's the problem...Throw them away & use RTV Silicon on the intake ends & alittle around the water ports..Problem solved..........;)

[Frosty]

Well this is easy,--its probably some bits that were on the old engine and now on the new. Logical my dear watson.

[gonzo]

A larger than factory cam will almost surely make water get back into the exhaust. A crossover pipe from one riser to the other helps.

[Frosty]

But hes getting water in oil!!!

Water in the cylinders due to reversion would cause a misfire and stop it, would'nt you agree?

Quote --a quart in 30 minutes.

[gonzo]

The overlap causes suction mainly at lower speeds and reverses the flow at the risers. It is like having a head gasket leak or a cracked head. Also, when the engine stops it sucks water back. The GM8.2 had the same problem even with factory cam. The fix was a pipe between the right and left exhaust.

[Frosty]

I can understand the reversion being helped by a cross over ( common on motorcycles too)

But hes getting lots into the oil.

I'lle go for the inlet manifold too.

[Rangerspeedboat]

There could also be a seal or a fitting inside the engine leaking oil. This happened to one of our engines, the rebuilder just didnt tighten the fitting.

[455Rocket123]

Cracked heads Or Intake gaskets The valley pan Set Does Not Come With The Intake gaskets You can Get Them On Summit for 12 Bucks I Went Through This With My 455 10 Qts Of Oil And 3 valley Pans later I Got The Problem:)

[mreoe4sure]

Do you have a presure reducing valve on the berkley pump, Many times these problems water in oil can be traced to a lack of one. The pump will put out around 100 psi and will cause intake gasket, front cover gaskets ( where water pump is removed) to leak. These gaskets are not made for this kind of presure. They are made to withstand around 20 psi, and if there is any surfaces that are not straight it will cause a leak. Hope I have not upset anyone with my 2cents Steve

[Hydro Phil]

Another possibility, the timing chain cover is very thin, pull the water pump plate & check for rust & pitting on timing cover. It only takes 10 minutes to pull water pump plate & check this & a new water pump gasket for a couple bucks. Are you running headers or log manifolds? I personally have same set up on a 74 Taylor SJ, Headers, & alum. intake manifold. If running alum. intake manifold DO NOT use metal gasket, jet makes too much pressure, use aftermarket performance composition gaskets. If timing cover is pitted, use a sharp scribe & poke the pitt`s, chance`s are scribe will go through !!! Phil

[technik]

External oil cooler cooled by engine coolant?look for a device between oil filter and oil filter flange.

[tile69]

OK SO....I have a 1971 shasta Jet Boat with a 365hp olds motor in it........OK so It runs pretty good so far..It starts pretty easy..Umm My question is though...I just changed the oil in it...I put 20 50 in it...I replaced the dipstick, It needed this bad, However when I did this I had to wait for the dipstick to arrive....Here is where I need some good old fashioned info....With the dipstick gone and an open hole in the block where one would b the engine got very very wet.....The engine since the oil change has not even got 3 mins of run time........(I ve been chasing wiring ghosts)...However I checked it today and it was pretty cloudy....NOT SLUDGEY but really cloudy and almost milky......Could this be from water seaping into the engine from the intense 3 days of rain...Thru the dipstick hole..There is more I also changed the Exahust Gasket becuse when I attempted to start it.Before this rain.While plugged into a garden hosen water SHOT OUT THE exahust gaskets on the Driver side...So I changed them....(NO MORE EXAHUST LEAK or water spraying)...Also after the heavy rain there was ALOT of water on the Intake Mainifold....And just looking at the Mainifold when its dry my first thought would be...WOW that needs NEW GASKETS....So Question is Where is the Water most likely coming From...SHOULD I CHANGE THE INTAKE GASKETS.... Also I have positve oil pressure Last time I checked but Not a staggering huge number.80 or 90 PSI right at starting.. around 60 PSI AT STARTING.IS this normal? When gas is applied it does go up.I think the sending unit is going I m not sure it..It sureges just a touch if I give it gas...NOT ALOT it never zeros out..Once i let off it goes back down to 60 or so PSI...IT Idles well and starts pretty easy... Three pumps and a turn of the switch and its going...idles about just under 800 nicely...........Is all lost or am I making a mtn out of a Mole hill.....Its also very Very rusty.....

[tile69]

Ohhh Also I m running a MSD 6AL with a built in rev limiter...That I will set at 3500 maybe 4000 RPMS.....I m looking into changing out of the points and running straight HEI....ALSO I M CONSIDERING A SET OF Edelbrock Logs and squierel cages....150 bucks....I m looking for some good advice for this olds.....Like I said its a 71 WITH G heads and a F Block