Volvo Cylinders fill with oil on shut down?

Hello,

I was told that the Volvo 740 (bf230) when shut down, the engine fills
they cylinders with oil so on a start up there is never any metal on
metal contact.

Is this true?

Thanks,

Tmuld.

 

Hi Tmuld,

Hardly..................... If the cylinders "filled with oil" it would be
disastrous. It would result in hydraulic lock.
I think what you're referring to is the Check Valve in the Volvo brand oil
filter. This prevents the oil in the filter from running back into the
oilpan when you switch off the engine. This ensures that oil is always in
the lubricating system upsteam from the filter, protecting the engine the
moment you start the engine.

So............. It's the FILTER that fills (or remains full) with oil, not
the cylinders.

Not all oil filters have this protective check valve.

Andy I.


: Hello,
:
: I was told that the Volvo 740 (bf230) when shut down, the engine fills
: they cylinders with oil so on a start up there is never any metal on
: metal contact.
:
: Is this true?
:
: Thanks,
:
: Tmuld.
:

 

What part of the south are you guys from ?.I mean the south as in the
United States not Ireland .
No Virginia they dont fill with oil or 710 depending on which way you
look at it .The later red blocks squirted oil or 710 under the pistons
to cool them somewhat .

 

Unless your car fills the street with thick blue smoke on start-up it
probably isn't

 

No, I'm not aware of any car with a feature like that. You will see
cars that smoke a lot when first started. The smoke is the result of
oil dripping into the combustion chamber as a result of worn valve
stem seals. If a seller of a used car has told you Volvo engines fill
the combustion chamber with oil he is trying to make you believe there
is not a problem with the engine.

 

No

 

Sounds like you are talking about their filter....not cyclinders...


Any other cars do this?

 

anyway... it's not a problem as long as you turn the prop through a
couple times by hand, before you try and start it.

 

Ah, you must have been involved with radial engine aircraft! Count 8 blades
before turning on the mags....

Mike

 

....not quite old enough to have 'been there, done that' but I've seen it
on TV *g*.
Actually, my dad (73 and going strong) took a ride in a B-17 last year.
He's retired Douglas Aircraft/MacDAC/Boeing so when he read about:
http://www.collingsfoundation.org/cf_schedule-wof.htm
coming to Long Beach, he signed up.
It was the first flight of the day so the 'customers' who wanted to got
to help walk those big 'ol radials through before they fired them up.
(He said they make it look a whole lot easier on TV.)

 

My dad's last ride in a B-17 was 60+ years ago. When he went to Germany
some 40 years ago he was concerned people would hold his last trip
against him.

 

Turn the prop through??? How would you do that on an automotive
engine?

 

As the rest of the thread clarifies, it was tongue in cheek ;-)

On radial aircraft engines, popular in the '40s and '50s for larger or
powerful aircraft, some of the lower cylinders would inevitably fill
partially with oil when the engine sat a while. Just firing it up risked
bent rods and blown off heads, so pilots would use the starter to turn the
crank through two complete revolutions to give the oil an opportunity to
drain before lighting the fires. With the usual four-bladed props, the pilot
would count the blade passage out loud to eight while cranking each engine
before switching the magnetos on. When the engine lit off, it would
invariably belch oil smoke for a moment to congratulate the pilot for his
prudence.

Mike

 

I'm well aware of why one would prop a radial engine. It hardly
addresses the O.P.'s question though.

 

Mostly it is an amusing diversion, but it also illustrates how big a problem
it would be if oil did actually accumulate in the cylinder of any top-valve
engine. The oil could not drain through the open valves and bent rods would
be very likely.

Mike

 

Maybe this will help?
http://home.pacbell.net/clayt/sense_of_humor.gif

 

Oh, yes, I remember my dad telling me about how those big radial
engines could be busted up if not started properly.

Going back to the question asked by the O.P., I wonder how he came up
with that topic. I have to wonder if it wasn't a story cooked up by
someone trying to peddle a car with a built-in perpetual oil
change... ;-)

 

Nope...

 

How soon we forget how many died in London from those who started the war
and bombing civilians ad hoc .Just a shame the nuclear bombs were not ready
then .BTW the war has been over officially for 62 years was your dad 13 when
he pressed into service so young ?For some the war never ended like my late
father in law and many of the poor souls I know who feel it was yesterday .