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Thread: Strange noises in the engine

  1. 8th April 2014, 09:54 PM #1
    Timj
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    Strange noises in the engine

    Hoping some of the engine gurus can help with this one. Standard 1977 2.25 4 cylinder Petrol engine. Had a head gasket give up on a trip on the weekend between cylinders 3 & 4. The rest of the gasket seemed fine. I have replace the gasket and put everything back together only to have a strange knocking noise happening. It is not consistent, if I turn the engine off and restart it will usually not be there, then if I rev it up it will come back and stay until the engine is turned off again. I have linked to a video that is really only useful for the sound track of when the noise starts. The engine is idling ok then given a rev and still ok, another rev and noises start. I am thinking it may be a sticking valve or something like that, tappets are adjusted correctly as far as I can tell.

    https://www.youtube.com/watch?v=0c8gpQOi6gE

    Any help appreciated

    Thanks,

    TimJ.
    Snowy - 2010 Range Rover Vogue
    Clancy - 1978 Series III SWB Game.
    Henry - 1976 S3 Trayback Ute with 186 Holden
    Gumnut - 1953 Series I 80"
    Poverty - 1958 Series I 88"
    Barney - 1979 S3 GS ex ADF with 300tdi
    Arnie - 1975 710M Pinzgauer
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  2. 9th April 2014, 07:02 AM #2
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    Killer
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    Tim, it is not as simple as a leaking manifold is it?

    Cheers, Mick.
    1968 SIIa SWB
    1978 SIII Game SWB
    2002 130 Crew Cab HCPU
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  3. 9th April 2014, 09:31 AM #3
    Timj
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    Hi Mick,

    I don't think so. I never actually took the manifolds off, I just lifted the head off with manifolds still attached. Also it runs fine without rattling sometimes which I would not expect with something like a manifold leak.

    Thanks,

    Tim.
    Snowy - 2010 Range Rover Vogue
    Clancy - 1978 Series III SWB Game.
    Henry - 1976 S3 Trayback Ute with 186 Holden
    Gumnut - 1953 Series I 80"
    Poverty - 1958 Series I 88"
    Barney - 1979 S3 GS ex ADF with 300tdi
    Arnie - 1975 710M Pinzgauer
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  4. 9th April 2014, 03:32 PM #4
    Timj
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    Well, found the problem. One of the pushrods was not perfectly seated in the cup at the bottom. Tappet was adjusted correctly but needed quite a bit more adjustment once the pushrod was properly in place. Now running fine.

    TimJ.
    Snowy - 2010 Range Rover Vogue
    Clancy - 1978 Series III SWB Game.
    Henry - 1976 S3 Trayback Ute with 186 Holden
    Gumnut - 1953 Series I 80"
    Poverty - 1958 Series I 88"
    Barney - 1979 S3 GS ex ADF with 300tdi
    Arnie - 1975 710M Pinzgauer
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  5. 10th April 2014, 06:38 AM #5
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    Killer
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    Good to hear you found the issue Tim.

    Cheers, Mick.
    1968 SIIa SWB
    1978 SIII Game SWB
    2002 130 Crew Cab HCPU
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  6. 10th April 2014, 02:45 PM #6
    Ozdunc
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    How did you tell the pushrod was out?
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  7. 11th April 2014, 09:05 AM #7
    Timj
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    The adjuster was sticking up through the lock nut more than the others. I had to back the adjuster right off and then could wiggle the rod and it dropped down a little into place.

    TimJ.
    Snowy - 2010 Range Rover Vogue
    Clancy - 1978 Series III SWB Game.
    Henry - 1976 S3 Trayback Ute with 186 Holden
    Gumnut - 1953 Series I 80"
    Poverty - 1958 Series I 88"
    Barney - 1979 S3 GS ex ADF with 300tdi
    Arnie - 1975 710M Pinzgauer
    Reply With Quote Reply With Quote
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