Hey guys I am hoping someone may have had this issue cause I am about to lose my mind. I had oil pressure issue for while now and found that gas is getting in my oil so I replaced oil pressure sensor, oil pump gears chain all that then put new fuel regulator in and new fuel pump. I tested all the injectors and they seem to be spraying fine. If anyone has had this problem before could help me out I would appreciate it. Thanks in advance Dan H
2003 vinz Tahoe getting gas in oil
- Thread starter DanH80
- Start date
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MassHoe04
Full Access Member
Information on possible causes in this article might be helpful...
dannysengineportal.com
Gas Getting Into Oil - What Can Cause This To Happen, And Why
Gas in oil lowers the viscosity of engine oil, which affects engine lubrication and causes scoring of the cylinder walls and engine bearings.
dannysengineportal.com
With an OBD scanner check your fuel trims and post them up, short- and long-term for both banks.
A standard fuel pressure leakdown test might show when it happens, and to identify any leaky injectors.
A standard fuel pressure leakdown test might show when it happens, and to identify any leaky injectors.
rockola1971
Full Access Member
May also be time to do a compression check to check for worn or damage piston rings. Fuel dilluting the oil aint good my friend. Its washing the cylinder walls dry, cam, crank and rod journals dry. Not to mention breaking down the oil itself. This could get really ugly.
droptopchevy
TYF Newbie
Second the compression check.
MassHoe04
Full Access Member
X3 on compression check.
Fuel could be pushing past the rings or head gasket on compression stroke, so the gas has already slipped by during that stroke, leaving no gas in the cylinder by the time the plug fires off a spark. Nothing left to go boom at that point. Has for that cylinder is already heading to the crank case if not there already.
If compression is good, we'll have to look elsewhere. But the compression test is a great place to start.
Fuel could be pushing past the rings or head gasket on compression stroke, so the gas has already slipped by during that stroke, leaving no gas in the cylinder by the time the plug fires off a spark. Nothing left to go boom at that point. Has for that cylinder is already heading to the crank case if not there already.
If compression is good, we'll have to look elsewhere. But the compression test is a great place to start.
