[Vwdiesel] Oil burner, grasping at straws

gary gbangs at cfl.rr.com
Tue Nov 9 16:47:06 EST 2004


For an NA engine, the only way for oil to get into the cylinders is:

1) past the rings
2) past the valve seals(and guides)
3) sucked through the CCV
4) a defect in the head gasket

or,

5) when you had the problem with the oil pump relief valve, that pumped
up the lifters. Oil is a non-compressible liquid. If the lifters were
distended, there may have been valve contact with the pistons. Not
enough to bend valves, but maybe enough to distort a valve guide stem,
distorting a valve guide, knocking it loose... ? Big path for oil.

Perhaps with the distended valve lifters, a valve to piston contact may
have resulted in a cracked or warped lifter bore, and that crack
propagated into the cylinder... ?

I think your bottom end isn't at issue here. But you need to pull the
head to get to the bottom of this mystery.

-Gary
1980 P/U NA-IDI
1997 Passat TDI 



On Tue, 2004-11-09 at 09:00, Bart Wineland wrote:
> Been trying to drive my car after the re-ring but had to surrender again 
> last night and break out the old Jeep. Checked the dipstick and after last 
> topping it off  2 or 3 days ago the oil level is off the stick, in no more 
> than 100 miles. Still white/gray smoke/fog like crazy after stopping at 
> traffic lights or revving up. When I am driving down the road at full force 
> I can see gray smoke coming out. It has all the power it ever had. Did a 
> compression check again and they range from 380 to 415 with the new rings. 
> Starts right up and drives nice. If I couldn't see the smoke screen in the 
> mirror and all the cars that pass me by flipping me off holding their noses 
> I wouldn't know there was a problem. I have advanced and retarded the pump 
> timing, adjusted the fueling, driven with the cc vent hose off, and tried 
> everything suggested.  I keep going back to when this all started a year 
> ago. The car would start and run for a few seconds then die. When cranked 
> again it would freewheel.  If I put the oil pan heater on it all was fine. 
> I took it to a local one man shop and he said it was the bypass on the oil 
> pump. He said it was not working causing the oil pressure to spike real 
> high and over pumped the oil pressure to the point that the hydraulic 
> lifters would not bleed down which of course was holding the valves 
> open.  He replaced the pump and it fixed that but ever since then it has 
> been smoking and using oil.  Can I be missing some fall out from this 
> yet?  Is it possible it is the wrong size oil pump for my na hydraulic 
> motor? Could an oil galley be plugged? Maybe something was damaged before I 
> got it to him?  I don't know.  I admit to not doing anything to the head 
> while it was off other then having it checked to make sure it was straight, 
> which it was. I can't believe valve stem seal or guides could let that much 
> oil past could they?
> 
> 
> 
> Bart
> 
> _______________________________________________
> Vwdiesel mailing list
> Vwdiesel at vwfans.com
> http://www.audifans.com/mailman/listinfo/vwdiesel



More information about the Vwdiesel mailing list