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Car Forum / Jaguar Cars / October 2005x type jag
Hi wonder if any one can help please,my father has bought an X type desiel, but the oil light keeps coming on, oil level is fine, can anyone give any indicatiors as to what could be causing this please. TIA > Hi wonder if any one can help please,my father has bought an X type > desiel, but the oil light keeps coming on, oil level is fine, can > anyone give any indicatiors as to what could be causing this > please. Failed sensor switch. -- C.R. Krieger (BT, DT) >>Hi wonder if any one can help please,my father has bought an X type >>desiel, but the oil light keeps coming on, oil level is fine, can [quoted text clipped - 5 lines] > C.R. Krieger > (BT, DT) And its most likely showing signs of oil leaking from it, which also confirms its stuffed. >Hi wonder if any one can help please,my father has bought an X type >desiel, but the oil light keeps coming on, oil level is fine, can >anyone give any indicatiors as to what could be causing this >please. The oil light's only function is to let you know when it senses a low oil pressure condition. I love the way the keyboard/armchair mechanics immediate reaction is to state that the sensor has failed. While this is indeed a possibility, the most important thing is to verify that there is adequate oil pressure to lubricate the engine, otherwise a routine rebuild will be a major replacement of components, possibly starting with the block and crankshaft, should a main bearing or connecting rod bearing "fail in flight". If there is truly a low oil pressure condition, it could indicate that it is time to replace the crankshaft bearings, or merely that the PO for some strange reason did not have the correct weight or type of lubricant in the engine, and possibly the sensitivity of the switch is marginal. Have your father check this asap without driving the car very far or very fast. Happy Trails To You > >Hi wonder if any one can help please,my father has bought an X type > >desiel, but the oil light keeps coming on, oil level is fine, can [quoted text clipped - 4 lines] > oil pressure condition. I love the way the keyboard/armchair > mechanics immediate reaction is to state that the sensor has failed. This 'armchair mechanic' has changed several oil pressure sensor switches in various vehicles. Since the OP mentioned that the level is fine, I go to the next logical *and cheapest* (I found it for <$7.) thing to check - whether it's a spurious reading because of a failed pressure sensor. > While this is indeed a possibility, the most important thing is to > verify that there is adequate oil pressure to lubricate the engine, [quoted text clipped - 10 lines] > Have your father check this asap without driving the car very far or > very fast. Sure. Spend about three times what it costs to *replace* the sensor switch to find out if there's pressure there. OTOH, if it is the *more likely* cause of a failed sensor, you will *still* have a failed sensor switch giving a false alarm after you have verified the oil pressure. I don't know about you, but *before* I go chasing around the innards of my engine to see if my oil pump is good, I try the simple and *cheap* expedient of making sure the sensor is good. -- C.R. Krieger (Been there; fixed that) Goodie for you - you've luckily not yet roached an engine farting around treating the symptoms and not the problem. I suppose you'd also recommend revving the sh.t out of it just to see if the sensor is stuck, huh? I've never found that it cost a fortune to verify the oil pressure. Is this difficult in your country? I like to do things logically not necessarily going by your cheapest first philosophy. Why do you type with all those asterisks - I never learned that kind of punctuation in school. Is that supposed to make you look like a smarter mechanic, or something? Happy Trails To You > Goodie for you - you've luckily not yet roached an engine farting > around treating the symptoms and not the problem. It has nothing to do with luck. It does have to do with experience. Even the best manufacturers (Audi, BMW, Toyota, etc.) all seem to use the same cheap crappy oil sending switches. It takes all of 10 minutes and under $7 to screw a new one in and start the engine. If the light stays on, proceed to Step Two (Your plan). > I suppose you'd also > recommend revving the sh.t out of it just to see if the sensor is > stuck, huh? I've never puffed an engine, in high speed driving events, in competition, or on the street. The switches don't stick. They usually leak (one diagnostic test is to look at them). Revving only makes it worse as well as risking the engine. Don't make me out to be as dumb as you are arrogant and condescending. > I've never found that it cost a fortune to verify the oil pressure. More than £3.50? > Is this difficult in your country? I like to do things logically not > necessarily going by your cheapest first philosophy. Your logic will cost you a lot more to diagnose a failed switch than it does to simply change it. If you change out a good one, you've done two things: 'wasted' $7 and gotten yourself a 'spare'. When the solution is so simple and so much cheaper than even the diagnostic tests, I doubt you'd find anyone, aside from yourself (You work for a Jaguar dealership, perchance?), who thinks it's not a good place to start. > Why do you type with all those asterisks - I never learned that kind > of punctuation in school. Is that supposed to make you look like a > smarter mechanic, or something? You must be new here. It's a common usenet usage for emphasis (Some use _underscores_; even fewer use >carats<.). Would you rather I SHOUTED? FWIW, I'm probably the best mechanic who practices bankruptcy law that you know. -- C.R. Krieger (Been there; done that)
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