Water mixing with engine oil

Tiny
GODYKE2002
  • MEMBER
  • 2007 NISSAN X-TRAIL
4 cylinder four wheel drive automatic 2427KM miles.

The car couldn't start, water mixed with engine oil, then the cylinder head was surfaced, the valves ground and the cylinder head gasket changed, afterwards the engine was started yet it was still mixing water and engine oil.
Thursday, January 29th, 2009 AT 11:07 AM

4 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,895 POSTS
Hey GODYKE2002,

The most likely cause is a blown head gasket, but there are many things that can cause it. here is a complete guide on what to look for when water is mixing with the oil:

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

Please run some tests and get back to us so we can continue helping you.

Best, Ken
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Tuesday, January 10th, 2017 AT 12:28 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,895 POSTS
Hey,

Did you ever get the problem fixed?

Best, Ken
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Tuesday, January 10th, 2017 AT 12:28 PM
Tiny
NORAH7
  • MEMBER
  • 1 POST
Hi sir, my Nissan Xtrail 2002-2003 model automatic transmission mixes oil with water, could be the problem be the head gasket/radiator or the oil cooler?
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Wednesday, July 15th, 2020 AT 12:21 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning,

I would suspect the oil cooler which is common. When it fails, then this issue exists.

I would try this before doing anything else.

Roy

REMOVAL
1. Drain engine coolant from radiator drain plug at the bottom of radiator and from water drain plug on cylinder block.

NOTE: Perform this step when removing water hoses.

2. Remove oil filter.

CAUTION: Do not spill engine oil on drive belts.

3. Disconnect water hoses from oil cooler.
When removing oil cooler only, pinching water hoses near oil cooler to prevent engine coolant spilling.

CAUTION:
Perform this step when engine is cold.
Do not spill engine coolant on drive belts.

4. Remove connector bolt, and remove oil cooler.

CAUTION: Do not spill engine oil to rubber parts such as drive belts and engine mounting insulator.

5. Remove water hoses, brackets and water connector, as necessary.

INSPECTION AFTER REMOVAL

Oil Cooler
Check oil cooler for cracks.
Check oil cooler for clogging by blowing through engine coolant inlet. If necessary, replace oil cooler.

Relief Valve
Check relief valve for movement, cracks and breaks by pushing the ball. If replacement is necessary, remove valve by prying it out with a suitable tool. Install the new valve in place by tapping it.
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Wednesday, July 15th, 2020 AT 4:45 AM

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