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Car Forum / Volvo Cars / March 2007Volvo 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, : [quoted text clipped - 7 lines] : : Tmuld. > Hello, > [quoted text clipped - 7 lines] > > 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 . > Hello, > [quoted text clipped - 3 lines] > > Is this true? Unless your car fills the street with thick blue smoke on start-up it probably isn't ;) --- Marten Gerritsen > Hello, > [quoted text clipped - 7 lines] > > Tmuld. 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. 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. > 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 >> 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. [quoted text clipped - 3 lines] > > 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.) > Actually, my dad (73 and going strong) took a ride in a B-17 last year. 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. 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 . >> Actually, my dad (73 and going strong) took a ride in a B-17 last year. > > 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. > 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. Turn the prop through??? How would you do that on an automotive engine? >> 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. > > 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 On Mar 7, 7:20 pm, "Michael Pardee" <michaeltn...@cybertrails.com> wrote: > >> 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. [quoted text clipped - 16 lines] > > Mike I'm well aware of why one would prop a radial engine. It hardly addresses the O.P.'s question though. > 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 On Mar 7, 9:20 pm, "Michael Pardee" <michaeltn...@cybertrails.com> wrote: > > I'm well aware of why one would prop a radial engine. It hardly > > addresses the O.P.'s question though. [quoted text clipped - 5 lines] > > Mike 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... ;-) > On Mar 7, 7:20 pm, "Michael Pardee" <michaeltn...@cybertrails.com> > wrote: [quoted text clipped - 22 lines] > I'm well aware of why one would prop a radial engine. It hardly > addresses the O.P.'s question though. Maybe this will help? http://home.pacbell.net/clayt/sense_of_humor.gif > > On Mar 7, 7:20 pm, "Michael Pardee" <michaeltn...@cybertrails.com> > > wrote: [quoted text clipped - 29 lines] > > - Show quoted text - Nope... |
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