Question about 2000 Oldsmobile Alero

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Motor oil leaking into overflow

My Alero has been using a lot of oil. Upon further exploration, I see there is motor oil in the overflow tank. Any ideas what is causing this?

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  • Lisa Smith Nov 04, 2008

    Thank you. That is what I was thinking, too.

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I KNOW that your problem is your INTAKE GASKETS, its alot cheaper, and you will also save lots of money just change oil and antifreeze after replacing gaskets

Posted on Dec 09, 2008

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If you mean the coolant overflow I would check the oil dipstick for water oil. It will appear white/tan. If this is the case I would firmly suspect a head gasket.

Posted on Nov 04, 2008

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Suggest you check your engine oil, it should be either light brown if just replaced, and black if you have over 30K miles on it.

If the oil is brown like in color, maybe you have an intake manifold leak and anti freeze is getting into the motor oil (Bad Bad) Check for leaks in the heater core inside the car and see if the rugs are wet.

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Oil in the antifreze over flow tank


hi there is there alot of oil in the plastic overflow tank ? what color is it ? when did you notice it ? does the engine run good is it shakey ? take a peek at all ur spark plugs you want them all to look the same slight brownish color is normal. lots of white on the plugs means coolant is getting on them under heat and pressure they get clean too white this is usually a head gasket damaged and leaking a little coolant into cylinder burning and being exausted through the muffler and you might see a white smoke from tail pipe, saying that coolant would not be going in oil that way . if its automatic trans there is a transmisson oil cooler built into the rad now tranny fluid runs through the rad cooling transmission oil coild get from transmission into rad in turn, getting into plastic over flow container. is there coolant in the engine oil ? the oil level will be a little higher than normal if there has been coolant getting into motor ? theres also another way that ive seen coolant enter the oil through the intake manifold gasket its tough to decide ehere the leak is , does it run and idle smooth ?
after a long ride in the hot daytime sun after you turn off let it sit for 20 min then pop the hood and with gloves on swueeze the upper rad hose and check if theres pressure in it dont open cap as im shure you know. if there is a coolant leak depending on how bad it is you will notice that there will be very little or no pressure in you upper rad hose need to pressurize the coolant in order to cool engine correctly. well i hope i havent said to much at once , take a close look at all questions and write me the answers maybe we can pinpoint the problem for you
1 rad transmission cooler
2 real bad head gasket or cracked head
3 intake manifold gasket how does it run and idle
anyhow i hope i helped you a little until next time
bye good luck get back to me please

Jul 07, 2008 | 1992 Ford Explorer

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