Water? Coolant? Oil to clean?

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Sep 3, 2006
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I just changed the oil today in my 95 Lt1 powered Fleetwood, the oil was dino Napa 10W40 and an Advance Auto Parts sure grip filter, which the ________ that put it on cranked it on so tight it took me half an hour by hand trying to take it off, sore fingers, wrist and hands after that. It must have turned 360 degrees at least twice before it finally started to spin off slowly, the whole time I could feel it just barely turning.

Anyways, the oil had less then 100 miles on it, I drove it around the neighborhood, not topping 30 mph, let it idle a few times. I finaly got it registered, its been at my house sitting a couple months, I started it/drove it about once every 2-3 weeks. I drove it 10 miles today, within the city, it was about 60 degrees, when I popped the hood it wasnt that hot, i ran the A/c to keep from over heating as there is more water then coolant in the radiator.

Long story short, I start draining the oil and it starts coming out milky brown in color, then clears up. Is this normal, the oil was still fresh Im feeling it has moisture on it.

I was concerned there may be coolant in the oil, the reservoir tank is down a little, BUT last week it boiled over in the driveway, thankfully I was there and shut the car off and let the hood open to cool off, there were no tell tales on the dash to say it over heated, no steaming engine or anything, just heard the tank bubbling/boiling and coolant seeping out the overflow tank.

I put Delvac 1300 15W40 and a Pure One Premium blue oil filter on, Im going to do an oil analysis at 1,000 miles or 1,500 miles.

I doubt the oil got up to operating temp, I drove about 15 minutes, top speed 50, and it was cool out, stopped for 15 minutes, and drove again 5 minutes to my final destination to change the oil.

Car has 177k miles, Im just a little worried, thanks.
 
oh, and there was no excess oil, suprisingly I only filled up a gallon jug, dipstick read full, capacity is 5 quarts.
 
Sounds like a blown head gasket to me. Or less likely, one of the heads or block is cracked. You can use a block test kit to test the radiator fluid for exhaust gases, or have a used oil analysis done to see if there's coolant in the oil.
 
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Sounds like a blown head gasket to me. Or less likely, one of the heads or block is cracked. You can use a block test kit to test the radiator fluid for exhaust gases, or have a used oil analysis done to see if there's coolant in the oil.




That's the most likely candidate. Combustion gasses presurising the cooling system can cause it to puke coolant without overheating.
 
Oil + water + oil pump = milkshake
BlownGasketOilCoolant.jpg


Never shut an engine thats in the actual process of overheating off. You did perfect. Working post engine coolant temp sensor/gauge. Post coolant flow not overheating.
But in the case of actual overheating, all shutting an engine off will accomplish is stopping whatever cooling flow it has left completely. This will cause signifigantly worse overheating than when it was running! The case then would be to stop the car. Turn the blower & heater on & everything else off until the engine temp stabilizes to a normal range, or as low as it is going to go.


Don't worry about running more water than coolant. Coolant itself transferse heat at 60% of the rate striaght water does. Aslong as the coolant system has the pressure to keep the water from boiling. You're fine.
%Coolant Freeze Boil in *F:
20% 16 253
33% 0 256
50% -34 265
70% -90 277



If it's not overheating, billowing white smoke, coolant in oil, oil / blow-by in coolant, or power is reduced. You won't know if a head gasket is blown.




Warm the engine up & do a compression, or leak-down test on it to find out.
 
ok, i bet the oil was just so fresh i never noticed, it looked nothing like that in the pic.
 
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ok, i bet the oil was just so fresh i never noticed, it looked nothing like that in the pic.




I can tell you from personal experience that you can have a head gasket leaking small amounts of coolant into the oil through the cylinder, and never see anything peculiar with the oil. Your UOA will help determine if coolant is getting in the oil, but it may be the case that it's only leaking into the cooling system.
 
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