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Author Topic:   White oil
dode
Member
posted May 13, 2003 11:25 PM
Ok, brand new 350 we are running valvoline 20-50 and running into a strange problem. Upon checking the oil after hot laps, apparently the oil had a very milky consistancy to it (I was not there and didn't see it), but there was no trace of water. They changed the oil and filter and went back out for hot laps, running 3 laps about 4500 rpms. Came back in and shut it down, and the new oil had the same look. I drained the oil tonight to examine it. The are no water droplets to be seen anywhere, and no oil residue appears to be in the radiator. Nor is there any water missing from the radiator. However, after only 3 laps and a few minutes of idling, the engine the oil is the same as the previous oil change. Feeling the oil on my fingers, it feels exactly as it did coming out of the bottle. However, it has a real milky look to it, but it is still very transparent, if that makes any sense. I am at a loss. Anyone have any idea what this could be? Blowby of some kind from the rings not seating yet? I really don't think it is water. One other thing is that the engine runs VERY cool. Like the max temp it saw on the track was like 180, and more like 170. Could that be a factor in it? Any clues? I am stumped. Thanks.

John

towmandan
Member
posted May 13, 2003 11:36 PM
You have a good one there the only thing I can think of is water.Anything used in assembly should be gone with the first oil change.I will follow this one. I want to know what you find out....Towman


dode
Member
posted May 13, 2003 11:43 PM
The weird part is how cool it runs. I am going to put a thermostat in before I run it and see what happens.

It has me baffled as well, as like I said I can find absolutely no trace of water and this happened in such a short amount of time.

John

towmandan
Member
posted May 13, 2003 11:53 PM
If you let it set, and it is water in a couple of days it will seperate, at least some and you should get some strait water out of the plug first.But for you I hope thats not the case....Towman


Flatlander
Member
posted May 14, 2003 12:03 AM
Oh, I forget to mention that it has done this with two different sets of heads, one set of which is fresh from the machine shop.

None of the plugs have shown the least sign of being wet when they were pulled. I supposed it could be a cracked block maybe, but it was magnafluxed.

I will consider any ideas at this point though.

John

towmandan
Member
posted May 14, 2003 12:16 AM
If it was getting any water in the cumbustion chamber it would be steaming and should be running hot evedently its just seeping into the oil, might be the intake what do you know about it. at this point all we can do is guess...Towman


jammin
Administrator
posted May 14, 2003 12:22 AM
Are you running methanol?

jammin

dode
Member
posted May 14, 2003 12:24 AM
Pump gas...9:1 compression

intake is the same intake we ran last year. It has no known problems.

John

jammin
Administrator
posted May 14, 2003 12:45 AM
What kind of head gaskets you using?

jammin

Roadhzrd
Member
posted May 14, 2003 03:53 AM
Did you have the splayed main caps installed? many times they drill too far into the water jacket and you'd never see the leak. Alot of times the head bolts leak even with the teflon thread seal. Could be gas too, sounds like your running a bit rich. Take a sample from your oil pan in a cup, the take some oil and mix it with water and another cup with some gas and water mix them up with a drill and after they settle compare samples. For what it's worth my oil has been milky for a couple of years with no problems. Many engine builders will tell you to add some stop leak to a brand new engine, even the $30,000 ones. I found the ceramic type(sodium silicate) type works best. You can also buy it cheaper at a drug store (same thing).


dode
Member
posted May 14, 2003 08:11 AM
Nope, no splayed caps, just a standard 350. It is a new style (90 I think) block, but that shouldn't make any difference I wouldn't think.

John

The Rascal
Member
posted May 14, 2003 09:46 AM
We’ve seen oil foaming in some hydraulic “lash adjusters” on OHC motors…the main reason for it is the tiny volume available in them cant move properly at high RPM and being up high there’s a lot of air available in the general area to mix with and they’re typically not “pumped” with a steady supply from a pushrod…I’ve never seen this phenomenon in a pushrod motor…but maybe there’s a high speed air mix taking place somewhere…Rascal


autoshop
Member
posted May 14, 2003 10:15 AM
My guess - foaming or fuel contamination - if you let it sit for a couple of days does it look "normal" then - how much oil are you running in the pan? Run about a quart less if it's a 7 quart pan and see if it's better.

Also - for fuel - check the fuel pump to see if the diaphram has a slight leak in it and is pushing gas back into the oil pab - the oil will usually have a fairly strong fuel smell to it in that case.

Also - do the easy thing - send the oil off for analysis - they'll tell you what's in it - if it's contaminated with gas or water, or there are metal/copper particles in it... takes a few days, but that will tell the story.

Thought you were getting out of racing?


dode
Member
posted May 14, 2003 11:53 AM
Hmm...well it sat from Friday night until last night and it was still the same color. 5 quart oil pan running an extra quart. Could that have something to do with it???

I smelled it and have seen oil with fuel contamination before, and I find no trace of it either. I will check the fuel pump though.

John

gerald berry jr
Member
posted May 14, 2003 12:00 PM
this is probably caused by blowby from new rings only other cause could be fuel in oil how are your plugs looking?


dode
Member
posted May 14, 2003 12:09 PM
Well they were a little black when I pulled them, but that was after it had idled from the track back to the pits, so not a real telltale sign.

I had considered that, but isn't there generally some odor associated with that, like from combustion gasses? I don't know I am shooting from the hip here.

John

gerald berry jr
Member
posted May 14, 2003 01:07 PM
yeah usually you should smell some fuel odor if you are running extra oil in a stock pan that will cause extra foaming of the oil used to have that problem with our pure stock


dode
Member
posted May 14, 2003 01:10 PM
Yes, we are running 1 qt extra in a stock pan, but after 4 days shouldn't most of that go away?


gerald berry jr
Member
posted May 14, 2003 03:04 PM
as long as you have extra oil in it will keep doing it


dode
Member
posted May 14, 2003 03:13 PM
hmmm...ok, so this is a product of the extra oil? I wondered about that. I have read that people run stock pans with an extra quart. Is this going to cause any problems? Thanks.

John

rico 08
Member
posted May 14, 2003 03:48 PM
I used to run into this alot and probably what you have is mostly condensation,since you're motor doesn't come up to temp it won't evaporate any condensation in the motor and when you shut it down and start it back up it just keeps building up,changing the oil will not remove all of it,beleive it or not a pcv valve will cure it but i'd try getting more temp in the motor.


Donnie Ross
Member
posted May 14, 2003 08:55 PM
I agree with rico ive seen the same problem especially at your water temp of 170 and only 3 laps oil probably wasn't above 212 needed to evaporate out the normal condensation in the engine get the oil up to temp and run a while it should go away if you are not losing coolant this is probably it, however i would pressure check the cooling system first to make sure it is not leaking as some others have said.


dirtracer14
Member
posted May 14, 2003 09:15 PM
I would say condensation also...pull a valve cover off ... see if they is water droplets on the inside...and get that thing up to temp!!!


Racer0
Member
posted May 15, 2003 08:16 AM
I had a bad intake gasket on a brand new engine allowing water into the valley getting my oil milking white also.


dirtracer7
Member
posted May 15, 2003 10:05 PM
I agree with condensation to. I put some oil deflectors on top of the rocker arms this year and the right side valve cover had alot of condensation . Make sure you get it hot enough when you run it .The oil looked alittle milky at first but since the track opened and Ive run it every week it has been staying clean.

[This message has been edited by dirtracer7 (edited May 15, 2003).]

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