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Thread: 135 psi on one cyl - V8

  1. 9th January 2012, 10:12 AM #1
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    135 psi on one cyl - V8

    Hi all,

    2001 V8 D2 Manual.

    Discovered the cause of a long time slowish leak - water pump which finally failed the other day. It got a little hot on the scan gauge II but pulled it over quickly when she got to 110. It has been a little hotter before when I screwed the coolant header tank lid on incorrectly...the low water alarm went off but I ignored it for a while because it had been getting air int he system and had been going off...crying wolf and all that.

    A compression test now shows dry with all cylinders at 190-210 but with number to a 135 and number 3 at 175. Wet number 2 goes up to 175-180.

    I assume then I am looking at a head failure - probably valve - this baby has been running LPG for the last 90,000 odd klms. i have owned the truck since new and she is now 11 years old and 187,000k.

    Any suggestions - I was thinking crack testing heads and head reco only...

    Cheers
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  2. 9th January 2012, 10:31 AM #2
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    Had an interesting chat to Triumph Rover spares who reckon if the motor is running smoothly with plenty of power (which it has) that variance is not a drama and just to keep running her. They say compression readings are high on the others anyway (the compression test though was done with injections still going...).

    Good I reckon, but doubt that she will reach the nearly 300,000k that my D1 V8 has on her.

    Cheers
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  3. 9th January 2012, 04:45 PM #3
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    do a leakdown test.
    Dave

    "In a Landrover the other vehicle is your crumple zone."

    For spelling call Rogets, for mechanicing call me.

    Fozzy, 2.25D SIII Ex DCA Ute
    Tdi autoManual d1 (gave it to the Mupion)
    Archaeoptersix 1990 6x6 dual cab(This things staying)


    If you've benefited from one or more of my posts please remember, your taxes paid for my skill sets, I'm just trying to make sure you get your monies worth.
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  4. 9th January 2012, 05:05 PM #4
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    Thanks Dave - there are many variables in the compression test, but I think given how well its running (cold and hot starting, under heavy load, very hot and cold weather etc) that I am better off not chasing problems, and just sticking on the water pump and driving it.

    Cheers
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  5. 9th January 2012, 05:11 PM #5
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    leakdown test...

    what if its coming out on the seam of the gasket, a bulge in the liner?

    a leakdown test takes all of 5 minutes to do (especially since you only need to do it on one pot) to give you a rough look at where the problem is.
    Dave

    "In a Landrover the other vehicle is your crumple zone."

    For spelling call Rogets, for mechanicing call me.

    Fozzy, 2.25D SIII Ex DCA Ute
    Tdi autoManual d1 (gave it to the Mupion)
    Archaeoptersix 1990 6x6 dual cab(This things staying)


    If you've benefited from one or more of my posts please remember, your taxes paid for my skill sets, I'm just trying to make sure you get your monies worth.
    If you think you're in front on the deal, pay it forwards.
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  6. 10th January 2012, 08:56 AM #6
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    Thanks Dave

    Cheers
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