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Thread: V8 Camshaft

  1. #21
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    Got the 91 through rego inspections today and talked with the mechanic about the torque issue. He is not a Land Rover person but offered the suggestion that it is not the camshaft but a timing chain that has slipped a cog

    Is this feasible?

  2. #22
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    Quote Originally Posted by aussiebushman View Post
    Got the 91 through rego inspections today and talked with the mechanic about the torque issue. He is not a Land Rover person but offered the suggestion that it is not the camshaft but a timing chain that has slipped a cog

    Is this feasible?
    Vaguely feasible, but once the chain has jumped a tooth it will shortly jump another and cease to run at all. Chain jump will also show up as massively retarded ignition timing so a check with a timing light is in order.

  3. #23
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    Yes - that make sense. Although sluggish on hills. there is no evidence of anything more serious, Yesterday I dropped into 3rd and rocketed up to 120 from 80 to pass three trucks with no difficulty at all. Can't be all that bad to do that.

    I'll just have to get some money together and take the vehicle to Graeme Coopers for a thorough going-over. I built and manage their website and have done business with them since Graeme first opened the doors so I know I'll get the right advice

  4. #24
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    I had similar problems in my 84 County. It turned out to be the advance in the dizzy. I put in a new one and it totally changed how it drove.

    Went from struggling to hold 80kmh up hills on the Hume to sailing over at 120kmh.

    Might be worth checking

  5. #25
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    Thanks - good advice
    Cheers
    Alan

  6. #26
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    Quote Originally Posted by aussiebushman View Post
    Thanks - good advice
    Cheers
    Alan
    Literally just fixed mine at home on the kitchen table it worked a treat! Suck on the hose and stick your tounge on it, it should have vacuum. If it dosnt you have nothing to lose, crack the sucker open and have a look at the diphram theres only gonna be 1 thing wrong with it. It's doing nothing if it's got no vac you can drive without it plugged in if you **** it up.
    Cheers Jim

  7. #27
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    Yes,, make sure the dizzy is performing as it should,
    after that its down to age of the cam lobes, these tend to erode over time...
    "How long since you've visited The Good Oil?"

    '93 V8 Rossi
    '97 to '07. sold.
    '01 V8 D2
    '06 to 10. written off.
    '03 4.6 V8 HSE D2a with Tornado ECM
    '10 to '21
    '16.5 RRS SDV8
    '21 to Infinity and Beyond!


    1988 Isuzu Bus. V10 15L NA Diesel
    Home is where you park it..

    [IMG][/IMG]

  8. #28
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    Good advice about the distributor. It may be coincidence or perhaps it was one of you who told Stuart (Graeme Cooper) about finding a broken "cutter" inside his distributor that he was able to repair himself - Stuart called me to suggest I investigate this.

    However, neither the manuals nor extensive Internet searches show what to look for. Can anyone please provide a reference link or picture?

  9. #29
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    Quote Originally Posted by aussiebushman View Post
    Good advice about the distributor. It may be coincidence or perhaps it was one of you who told Stuart (Graeme Cooper) about finding a broken "cutter" inside his distributor that he was able to repair himself - Stuart called me to suggest I investigate this.

    However, neither the manuals nor extensive Internet searches show what to look for. Can anyone please provide a reference link or picture?
    Have you sucked on the hose yet?
    Disconnect the vac hose from the intake,get your lips around it and suck suck suck, stick your tounge over it and see if it sticks!
    Did you ever pull the rotor arm off? If so the weights could be dislodged. A broken weight seems highly unlikely more so dislodged easy fix, you can whack a screw in the shaft while your at it it to stop it happening again. Bee done a write up maybe under "Lucas distributor shaft screw fix" something like that anyway....

    Cheers Jim

  10. #30
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    As suggested, I'll check the vacuum advance first and then will check if the weights are jammed but I do not want to pull apart my distributor until I know what I am likely to find.

    I got a description from Stuart that the broken part mentioned by his customer was like a "helicopter blade" He named the part a "cutter", but it seems the more common name is "stabbing wheel." I did some more searching and found this article on a Volvo website and the picture certainly looks right. Mine may or may not be a "hall effect" type and I won't know until I take it apart - not something I'm anxious to do

    See about half way down the article describing "hall effect" distributors - https://www.volvoclub.org.uk/faq/ElectricalIgnition.html#DoesMyCarHaveaHallorRPMSen sor

    The article says the hall effect sensors were discontinued for Volvos in the late 80's but certainly may be the type used on Range Rovers up to early 90s (or changed to this type later): Replacement parts may still be available on the Internet if I can identify the right one
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