Antifreeze in crankcase

IA801

MEMBER
2002 FORD RANGER
3.0L
6 CYL
2WD
AUTOMATIC
135,000 MILES

Briefly, there is anti-freeze in my oil. I had a mechanic replace lower intake gasket. Then discovered oil pressure dropped. Oil was like milkshake. Immediately changed oil, and no major clinking noises. However, needed to change oil again about two hundred miles later. Then again, two hundred miles later. Could hear a squealing noise on a cold start and suspected it to be coming from the oil pump. Was told that oil and antifreeze will mix, and some antifreeze will separate to the bottom. Started a drip at the oil plug. Normally, the oil plug would be completely unscrewed and would not leak until pulled from the oil pan. Now with a few turns a mixture of mostly coolant and a little oil drips out. I have drained at least four quarts of this out. The squealing noise is not as long and is quieter. I am afraid there is more anti-freeze in there. Does this sound familiar?

5 Replies

HMAC300

MECHANIC
48,601 POSTS

Coolant level obviously has to be low. Fill system up and rent pressure checker at auto parts and check for coolant leak like a head or intake gasket. It sounds like leak is worse and anti freeze and oil do not mix you can lose your engine like this.

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Friday, June 16th, 2017 AT 9:47 AM

IA801

MEMBER
3 POSTS

The coolant level has not changed. As I mentioned, the coolant got into the case when the lower manifold was removed. It has gotten better, however, what advice do you have for removing antifreeze from the oil? I do not want to lose my engine.

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Friday, June 16th, 2017 AT 10:05 AM

KEN L

MASTER CERTIFIED MECHANIC
42,882 POSTS

Hello,

Once you change the oil the coolant should be gone, if it returns then you have a problem like a blown head gasket.

Here is a test to help confirm the problem.

https://www.2carpros.com/articles/head-gasket-blown-test

and

https://www.2carpros.com/articles/coolantantifreeze-in-the-engine-oil

Please let us know what happens.

Cheers, Ken

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Friday, June 16th, 2017 AT 10:33 AM

IA801

MEMBER
3 POSTS

The coolant is not returning. I have changed the oil and it is not gone. I change the oil and it breaks down from mixing with the residual coolant left over, which is obviously on the walls and whatever else may be in an oil crankcase. When you change your oil, there is always oil left behind and sludge that will not drain, that is where the coolant is hiding. Changing the oil, just mixes with the old oil and anti-freeze that will not drain.

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Friday, June 16th, 2017 AT 10:56 AM

HMAC300

MECHANIC
48,601 POSTS

Have you changed the oil filter? That should be changed as well and if you have an oil cooler on the engine it will take a bit for it to get out. Also if you drive it about 20 miles or so n eway will help as it will let engine get fully warm to get it out as well if you just drive less than 10 miles a day condensation is what you are seeing and should be put on a oil change and filter of 3000 miles or 3months at the very most.