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I have a '87 s10 blazer. I pulled the engin and had it rebuilt 3 yrs ago.. It has about 30k miles from when i put it back in.It is my hunting ride so it doesn't get a lot of miles..but we do run it every day to go out to the dog house....last year i had a tork converter go out in it. I work on my stuff alone so i opted to pull the engin to make the repair instead of all that on my back work.. soon after the repair i started noticing OIL in my WATER.... no water in my oil just OIL in WATER.. IT runs great ,, idels well,, good power (for a 2.8) doesn't miss...I put in a brand new radiator when i put the rebuild in,,, and it is clear that this isn't trans. fluid it's good ole valvoline.. no one i ask has ever heard of this..i want to .....repair this before hunting season is here.. and all i know to do is change every gasket.. but i don't want to change them all if i don't have to... any info would be greatly apprecated...thank you Tony
Answer -
How did you go about diagnosing that you have OIL in your coolant, But no coolant in your OIL ?.
I can't wait to hear this one as it makes absolutely no sense.
FYI: I have 3 chevy blazers, An 87 with the 2.8L, An 89 with the 4.3L and I just bought a 2004 Blazer on Friday.
autohelp Thanks for replying... and saying the same thing everyone else says...it makes no sense..I have drained my oil sevseal times... there is no water in it..... if u let it sit for a while and take off the radiator cap and stick your finger in it you get oil out...if i run it for a while let it cool and take cap off there is coffee color whip cream .... you can watch the dip stick and see a loss of about half a quart in a month... wouldn't the level raise if water was going into oil? i kinda wish there was water in the oil as that is what everyone is telling me i should have..."no sense" (trust me i know).....fyi,, 86 blazer ,, 87 blazer,, 86 S104x4 pickup,, 88 2wheel drive S10 pickup (bought new,, crashed,, parts truck)... thanks again for your time and any help..p. s. i had ask this question to another on here,, his answer was change head gaskets,, thanks again Tony
AnswerThere is a possibility, Though RARE and I have only seen it TWICE according to my compuer records. If you are getting a small amount of coolant leaking into the combustion chambers of the vehicles engine while it is running at normal operating temperature you would not see any coolant on the dipstick or detectable in the engine oil thus your reason for using a quart of oil in about a month.
You would also see dark colored traces of engine oil in the radiator.
Ok, If you want to test this theory here is what you can do to confirm it:
1. With the engine at normal operating temperature drain out just enough engine coolant so that you can remove the top radiator hose, The adapter that covers your thermostat and the thermostat.
2. remove all of the spark plugs.
3. using your compression tester hose, Remove the check valve from the bottom of the tester hose and screw it into one of the spark plug holes.
4. Apply about 60 to 80 lbs of air from an air compressor to the opposite end of the tester hose and making sure that the engine coolant is level at where the thermostat was removed, look for air bubbles at the thermostat opening.
5. repeat the process on all of the other cylinders.
If you see bubbles, This would indicate a head gasket(s) leak between the coolant passages and the combustion chamber.
If you do NOT detect any bubbles, Perform the exact same test procedure except this time do it with the engine COLD.
The last time I saw this was back in 1988 on a chevy corsica and it was the head gaset as it had a small fracture between the coolant chambers and the combustion chamber on cylinder # 3.
Let me know what you find.
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Retired in New Mexico
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