Have some white, milky looking substance on the end of the oil dipstick of a 2003 Tahoe. Oil pressure running close to 80 and has been using oil. Not running hot and anti-freeze looks ok. No oil drips either. Head gasket or cracked head? Thanks
I'd be tempted to live with it depending on whether the vehicle is using coolant on the assumption that it is condensation causing the saponification of the oil. If the Lucas oil treatment caused the pressure to rise so dramatically I would suspect that some crud has come adrift and lodged in the pressure sender.
The chance that the cylinder head is cracked would be more rare than a leaking head gasket both of which could possibly be tested by a leakdown test of individual cylinders.
The water has to come from somewhere.
Does the soap go away when the engine is warmed up?
Testimonial: "Good point on the pressure issue, not using coolant. Dip stick had rust on it and so did the inside of the fill cap. Hot or cold white on the stick."
Change the oil and put in some lucus oil treatment this should take care of your problem!!!!!!!
Testimonial: "Thanks, did that last week, and still hve the issue but now the pressure when up to 80. "
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Goop is on the bottom tip of the stick, using a quart and a half between changes. Changing when light comes on, varies between 5-6k miles.
Possibly the "soap" in your crankcase may be caused by normal condensation producing enough water to mix with your oil. I am assuming the goop is at the top end of the dipstick. The 80 psi oil pressure sounds a bit extreme; what is your oil-usage like?
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