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Condensation in filler neck tube on 04 tahoe.... Ok so i had my tahoe for a while and it has 130k miles on it. I was checking the fluids because i losses water so i filled it and i was checking the oil and its good no water mix in oil BUT i happened to look in the filler neck for the oil and there was water condensation and yellowish sludge in the lower half... Any ideas. Of what mat be the problem thanks

Posted by on

1 Answer

Normal for the most part

Condensation when cold &
the yellow is most likely dyes
in the oil additive package

Make sure the PCV System works &
no vacuum leaks

I did not say change the valve,never
needs to be changed,clean every 3 years,
if you like

If you were to remove the valve covers, you
really wouldn't like what you see.

Only what I have done for 20 years -- I use Mobil 1
full syn & never go over 4,000 miles & things stay

I have had 2 oil pans off,not of my choice & they
were clean.

I used Valvoline Semi Syn back before that & no issues

I like a half quart of Marvel Mystery Oil in there
My not be of any value, but haven't had any issues
with OBD2 Systems with 5W-20 Mobil 1 & Marvel
or 0W-30 Mobil 1 on the really old vehicles

Posted on Dec 01, 2012

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SOURCE: Can not fill 2002 Ford Explorer with gasoline.

Did you check the vent tube alongside the filler neck? If it is pinched or blocked with something, just what you describe will happen. The air in the tank needs some way to escape to make room for the gas, and it should be through the vent tube. If it's bent, pinched, blocked, you will have a hard time pumping gas in.

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SOURCE: 2000 Olds Silhouette has oil sign in radiator

I had this problem too. Could be loose bolts holding the intake manifold down. Lots of work to reach the bolts, but much more work and $ to replace the gasket. Look closely for the bolts, some parts may have to come off to locate them.

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