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What do you think of a used 1990 Jaguar XJ6 in terms of reliability?

I'm getting ready to purchase one used. It has a straight six engine. I stated it up from a used car dealership and it runs okay. The only thing that seemed really wrong with it was it had a bad battery and the guy at the dealership had to hotshot it, outside of slight cosmetic wear, primarily in needing a paint job. Also, I heard the engine knocking some when i started it, which it started up fine and right away. Not sure if the knocking is associated with engine wear or if that's just how a straight six engine is more inclined to sound like.

12 Answers

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  • W
    Lv 4
    9 months ago

    Jaguars have/used to have Lucas electrics. The man who invented this was known as the Prince of Darkness.

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  • fuzzy
    Lv 6
    9 months ago

    Wouldn't buy it unless you can do the work yourself & LOVE the marque. Very nice feel on the road, moderately reliable if well maintained by a mechanic who knows what they're doing with a Jag (not many do & they charge a premium for their knowledge)

    Not famed for reliability (rather opposite); the motor originally saw use in the D type Jag & won the le Mons 24 hour race averaging over 100 mph for the race but could still do 20 mph in third gear afterwards. (Try doing that with a modern race engine) BUT highly trained mechanics needed

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  • Edna
    Lv 7
    9 months ago

    Don't buy it. A 1990 Jaguar is already 29 years old. How much "reliability" can you expect a 29-year-old car to have? It's not surprising the engine was "knocking".

    The used car dealer saw you coming, and he caught a fish.

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  • 9 months ago

    Modern Jaguars now have excellent reliability.

    But that one was designed and built back when they were shockingly bad even when brand new.

    Any straight 6 engine in good condition should run as smooth as silk.

    What you’re looking at is a money pit which is only worth scrapping for parts.

    “A fool and his money are soon parted”. Do yourself a favour and don’t be that fool.

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  • Anonymous
    9 months ago

    They have totally crap electrical systems and wiring, so damn bass akwards electrically complicated that they usually end up siting in a garage space collecting dust once they develop phantom electrical issues.

    New off the showroom floor in 1990, you were lucky to get 50K miles before they were stuck in the shop.

    When they say it was garaged and sparely driven, there's a reason! You are about to be the next sucker.

    That unit probably has a parasitic battery drain issue, one that they can't find so they are dumping the car.

    Connect a test light between the battery + and starter cable. If it lights up, you don't need those problems.

    The 1990 XJ6 is prone to wiring connection corrosion, exacerbated if you live in a salt water environment.

    People will often convert them to a GM 305 / 350, they do sell full kits to convert them to reliable GM parts.

    XJ6 with a 300HP Camaro LT1 / 4L60E drivetrain - http://www.jaguarspecialties.com/photos/XJ40w-AC-2...

    My advice is for you to stay away if you're not good at finding scrap parts and installing them yourself.

    A water pump for that car is $300 and hard to find, a GM SBC water pump is everywhere for only $50.

    If you break down, it's flatbed time and you better have a ford fiesta to get you to work for a few months.

    The same goes for Rover, they are outrageous to get repaired at a reasonable price. Highway robbery$

    If you plan for a street semaphore sleeper car, it could be a very fun project car to modify with patience.

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  • Anonymous
    9 months ago

    When they were made by British Motors they did not last. The fact FORD bought the plant in 1989 means you probably got a British car. They reliably broke down, leaked oil, etc. which is why so few of them exist. They are better a show room car...than actually driven on the road. Engine noises is something you run away from unless you are a gear head and want a project car to work on.

    . Personally I would rather work on a SKODA(as the parts are cheaper)

    If you have to hire a mechanic to work on the car, I hope you won the Lottery cause he will want all that money as payment.

    . Parts are hard to get and are pricey. You got to love fixing it.

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  • 9 months ago

    Good luck. I'd take pass.

    Source(s): Mitsubishi Master Tech
    • falconry2
      Lv 7
      9 months agoReport

      Exactly, Jaguars are a maintenance nightmare and the electricals systems are even worse when they start going bad. An engine shouldn't make any knocking sounds and the Jag engines, while well-engineered, are not easy to work with.

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  • Anonymous
    9 months ago

    Dont buy it. Hydraulic Lifters may be damaged.

    Sure, maybe it is just a misfire and it needs a tuneup. Sure, maybe the air fuel mixture isnt right and that is why it knocks. Maybe the oil that the previous owner was putting into was too heavy. Your going to get some lifter noise if you put 10w40 in an engine that should be taking 10w30. etc etc.

    The point is. Why take a chance only to find out that the knock is being caused by NONE of those things? Or that the problem isnt just a hydraulic lifter that needs to be replaced and that you need either a new engine or a complete engine overhaul.

    Dont risk it buddy, this car will wear you down mentally.

    Source(s): nothing
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  • Anonymous
    9 months ago

    rule number ONE in buying ANY car , any unusual noises at all - walk away , rule two always see the car start from cold , don't let the seller warm it up that can hide all kinds of problems

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  • Anonymous
    9 months ago

    It’s a mechanics dream. If you are not a mechanic don’t buy It. Get a good used BMW.

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