Question on 2001 m62 4.4L compression number
 

Hi.

I've purchased 01 4.4L with about 110,000miles for $2000. The prices was low due to smoky exhaust on start up. Also CEL P0011.

P0011 seems to be timing chain guide. Which will be worked on later.

But before I tackle this, I started with compression test to make sure smoke is not something to do with valve ring.

After compression test, here are numbers

1. 180
2. 180
3. 190
4. 195
5. 190
6. 190
7. 190
8. 190

Seems pretty good, but the concern is that when I removed spart plugs, there were soaked with engine oil, especially on cylinder 3,4,7 and 8.
Since cylinders were wet already, I cannot really perform leak down test either.

What do you guys think? Should I tackle this? Or just part out?

Thanks.

What do you mean with "valve rings"? Do you mean piston rings or valve stem sealings?

Due the stem sealings do not affect the compression rate, I presume you mean the piston rings. In that case they're OK, as you stated.

That means it's either stem sealings or it's a oil pan ventilation, which is maybe clogged by water/oil emulsion because of many short range trips with cold eingine.

Valve stems will hardly make the spark plugs wet, so I'd take a deeper look to the bottom of the oil cap and if theres some sludge I would inspect the oil pan ventilation.