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oil foaming

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New User

Feb 8, 2008, 9:55 PM

Post #1 of 9 (951 views)
oil foaming Sign In

I have a 05 colorado pu, 2.3 l that foams the oil. is this normal?

Tom Greenleaf
Ultimate Carjunky / Moderator

Feb 9, 2008, 6:56 AM

Post #2 of 9 (943 views)
Re: oil foaming [In reply to] Sign In

NO! Wrong oil maybe or contaminated or mixed with something by mistake. Head gasket, Auto trans cooler, could get anti-freeze or ATF in engine oil - that usually like milky/creamy-foam possible either brown or pinkish. Automotive engine oils do use anti-foaming additives.

I'm not there - does it seem like a minor issue, major like oil level too high, seen looking in oil fill area and under cap, all over dipstick??

Long retired now

New User

Feb 9, 2008, 8:43 AM

Post #3 of 9 (942 views)
Re: oil foaming [In reply to] Sign In

i am using 5w30 mobile 1 syn. the only place i have seen it is on the dip switch. i am not using any cooling fluid or trans fluid.

Tom Greenleaf
Ultimate Carjunky / Moderator

Feb 9, 2008, 8:58 AM

Post #4 of 9 (937 views)
Re: oil foaming [In reply to] Sign In

This could be normal as I'm not seeing it. Just what do you mean by "foam" in the oil? Things like it looked like a fizzy soda or something, or just some guck high up on the dipstick....... that could be from condensation in some wild temp/humidity changes.

Try to describe it again. If you clean the dipstick will it check ok now?

The oil you are using and all I know of don't have this habit by themselves,

Long retired now

Anonymous Poster

Feb 9, 2008, 4:46 PM

Post #5 of 9 (931 views)
Re: oil foaming [In reply to] Sign In

it is a yellowish color foam on the dipstick. I have flushed the crankcase twice and it comes back. when you pull the dipstick out and wipe it clean and insert and remove again there is still some foam like substance on the dipstick

Tom Greenleaf
Ultimate Carjunky / Moderator

Feb 9, 2008, 5:23 PM

Post #6 of 9 (924 views)
Re: oil foaming [In reply to] Sign In

Sorry this is taking so long to nail this down but we're getting there.
When you drained the oil I need to know what that looked like as if this goo is just on the dipstick and in the tube for it it won't flush out with just changing the oil. If the drained oil looked ok itself then I would clean the inside of the dipstick tube with probably a peice of wire with a small peice of rag/cloth on it (Q-Tip) idea and then see if it returned.

I've seen this happen when it gets real cold for a while and then a sudden warm day that is humid makes the metals in and out of the car condense water just like a glass of ice water in the Summer can do. It may have been just something like that and taking it's time.

Yes - I'm trying to rule out a headgasket problem as jumping to that conclusion right this second would be in haste.

The oil will make some color which may or may not represent what as the anti-freezes are just dyed a color usually a green or redish just for identification. The oil starts with a amberish color and who knows what exact color that would make even with plain water. I've seen the beige color. Who knows what colors they put in the oil either? I really don't know if a dye is added to please you looking at it.

If you identify "yellowish" it could be that the color "green" is a mix of "yellow and blue" which it is as recalled from light years ago in school with fingerpaints! (note your printer only uses three colors to make all others) Also noted when some paper with green got wet sometimes it would stain another color.

So I'd like to see the dipstick tube itself cleaned out. I think I've done that with just a longer thin cut strip of a sheet also using the dipstick to push down and be able to pull out the material. Good grief don't lose anything down the tube!

Hey - any other history that might help figure this out? Weather noted, an overheat in it's history. Needing to add coolant now and then?? Anything? I'm trying........

Long retired now

Anonymous Poster

Feb 10, 2008, 7:51 AM

Post #7 of 9 (918 views)
Re: oil foaming [In reply to] Sign In

the oil looks normal when i change it. i have only had the truck one year. i have been thinking about running something down the tube, but i am afraid i might loose it or it will get stuck. when i first bought the truck from chevy they did not change the oil because the computer didn't tell them too change oil.
i had to add antifreeze when i bought the truck but i haven't had to add any since. i am not seeing an over fill condition like water or trans fluid on the dip stick, it stays about the same level. this was a certified used truck from chevy dealer who told me it was a local trade, but when i got the title it was out of state.

Tom Greenleaf
Ultimate Carjunky / Moderator

Feb 10, 2008, 8:50 AM

Post #8 of 9 (916 views)
Re: oil foaming [In reply to] Sign In

Oil looking normal when changed is great news. There may not be any problem at all. The issue with the dopstick tube is that it's a dead end tube with no oil flow thru it to self clean. If things look ok from what you can see thru the oil fill cap you could just monitor this a forget it or try to clear out the tube. I would use an old bed sheet cut into a strip longer than the dipstick and chase it down with the dipstick and pull both out together till it's clean enough. You have to use judgement that the material will come back out.

Guess I'd just do what you can do and keep an eye out for changes,

Long retired now

New User

Feb 10, 2008, 10:10 AM

Post #9 of 9 (914 views)
Re: oil foaming [In reply to] Sign In

thanks for the help. this is the first time i have used a forum. I am pleased to have found you.

oil foaming

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