850 High Oil consumption

[Stuart Dentt]

Hi there

I have a 92 850 with 141,000 miles on the clock. Presently, it uses
2.5Litres of oil every 1000 miles. I have check that the flame trap is
clear and there are no oil leaks. When I take the dipstick out whislt the
engine is running, a very noticable puslating column of vapour comes out.
Is the engine shot? Or is there some other failure possibility which is
cheap to fix?

Stuart

 

[John Horner]

Hi there

I have a 92 850 with 141,000 miles on the clock. Presently, it uses
2.5Litres of oil every 1000 miles. I have check that the flame trap is
clear and there are no oil leaks. When I take the dipstick out whislt the
engine is running, a very noticable puslating column of vapour comes out.
Is the engine shot? Or is there some other failure possibility which is
cheap to fix?

I would do a compression test as the next step. Not hard or expensive to
do.

Your oil consumption is very high.

Any smoke from the tailpipe under idle, acceleration, or deceleration?

John

 

[Mike F]

I would do a compression test as the next step. Not hard or expensive to
do.

Your oil consumption is very high.

Any smoke from the tailpipe under idle, acceleration, or deceleration?

John

Also check the PCV system. Under the intake manifold at the front
(belt) end of the engine is a black plastic box that is the oil trap.
With poor oil change history this clogs up, as do all the associated
hoses. This box is impossible to clean properly, and you need to remove
the intake manifold to replace it. Under the throttle pulley cover is
some of the plumbing associated with this system including the flame
trap. Start by looking at it, and the hoses that are easily removed
around it. When this system is clogged up, the blow by pressure looks
for other ways out of the engine, often causing leaks at various seals,
popping the dipstick out, etc.

--
Mike F.
Thornhill (near Toronto), Ont.

NOTE: new address!!
Replace tt with t (twice!) and remove parentheses to email me directly.
(But I check the newsgroup more often than this email address.)