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Strange engine
When I start the engine of my 96 Metro in the morning, it sounds like a tractor, lots of knocking coming from the engine. But after a few minutes, its fine, and you don't hear anything. Someone said it might be the fuel pump gone. This only happens if its been left all night, not when its only been left for a few hours. Any suggestions? Thanks |
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#2
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In article .com>,
wrote: > >When I start the engine of my 96 Metro in the morning, it sounds like a >tractor, lots of knocking coming from the engine. > >But after a few minutes, its fine, and you don't hear anything. Someone >said >it might be the fuel pump gone. > >This only happens if its been left all night, not when its only been >left >for a few hours. Could be self-adjusting tappets - thingys that come between valves and camshaft. See http://www.volvoclub.org.uk/tech/HydraulicTappets.pdf They expand under oil pressure provided by the oil pump so that no valve adjustment is necessary. Overnight the pressure drops and a gap appears as if the valves weren't adjusted. At lower temperatures, when the oil is thick, it takes some time to recharge them. If the sound is present more frequently at low temperatures then this is probably the cause. Different grades of oil will also affect recharge rate. The service manual for my BMW with a M50 2.5l engine states that this is not considered a problem unless the noise doesn't disappear after 15 minutes. -- /"\ Jan Kalin (male, preferred languages: Slovene, English) \ / http://charm.zag.si/eng/, email: "name dot surname AT zag dot si" X ASCII ribbon campaign against HTML in mail and postings. / \ I'm a .signature virus. Copy me to help me spread. |
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#4
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Bad Anti-Drainback valve in oil filter? Or oil viscosity is toast?
Cheap enough to try an oil/filter change with a quality filter... --Don On 8 Mar 2005 02:36:25 -0800, wrote: > >When I start the engine of my 96 Metro in the morning, it sounds like a >tractor, lots of knocking coming from the engine. > >But after a few minutes, its fine, and you don't hear anything. Someone >said >it might be the fuel pump gone. > >This only happens if its been left all night, not when its only been >left >for a few hours. > > >Any suggestions? > > >Thanks |
#5
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> wrote in message oups.com... > > When I start the engine of my 96 Metro in the morning, it sounds like a > tractor, lots of knocking coming from the engine. > > But after a few minutes, its fine, and you don't hear anything. Someone > said > it might be the fuel pump gone. > > This only happens if its been left all night, not when its only been > left > for a few hours. > > I am surprised that a Metro has lasted this long. Most of them seem to have been scrapped. A nastier example of a rusty Leyland [BL] model would be hard to find barring the Morris Ital. Huw |
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