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Thread: Valve sizes Holden Red 179

  1. #1
    Join Date
    Jan 2013
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    Molesworth,Tasmania
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    Valve sizes Holden Red 179

    I am looking to replace some bent valves on the 179. Old valves marked (inlet)Dufor v171003 and (exhaust)k1711003. Repco say the 003 = 3000 of an inch larger than standard? They cant get the larger size, only the standard ones. Question is , does anybody know where I can get the larger ones and what difference would 3000 of an inch make? Repco couldnt offer an explanation.
    All comments gratefully received as usual.
    cheers,
    D

  2. #2
    Join Date
    Mar 2008
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    Kilmore, VIC
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    3 thou (ie. 3/1000") is less than 0.08mm. Not talking much. Oversize is just a way of tightening up the clearances on the stem to guide. If the valves are bent the guides might (?) be damaged also. Which may need a ream and next size up again? Or K-line any affected guides and get std-size stem valves for it? Many options.
    DiscoClax
    '94 D1 3dr Aegean Blue - 300ci stroker RV8, 4HP24 & Compushift, usual bar-work, various APT gear, 235/85 M/Ts, 3deg arms, Detroit lockers, $$$$, etc.
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  3. #3
    Join Date
    Jan 2013
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    Molesworth,Tasmania
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    Thanks for this. So we are talking about the stem - when I asked where the differnce was I was told in the “trumpet” part. The guides are integral to the head , not sleeved.
    cheers,
    D

  4. #4
    Join Date
    Jul 2006
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    Brisbane, Inner East.
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    10,938
    Take the head to a reco shop and have bronze thinwall sleeves installed in the guides and go to standard valves. If you have some bent valves you are going to need replacements for them. Might as well do the lot whilst you are at it.
    URSUSMAJOR

  5. #5
    Join Date
    Apr 2014
    Location
    Blair Athol, Adelaide South Aust.
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    2,630
    Just get the head reconditioned by a reputable engine reconditioner. In the old days repco and others would "hone" out the valve guides on holden heads and fit oversized stem valves. A cheaper way to recondition a holden head. Best way is to machine the guides and fit bronze valve guides and then new standard valves. Valves for all common engines are cheap as these days. Also fit hardened exhaust valves and seats to stop valve recession caused by unleaded fuel or LPG.
    Cheers, Rod


    BETSY
    1967 Series 2a. 109 4 cyl petrol, Fairey o/drive, Athol Hedges roof.
    Currently undergoing rebuild.
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    1975 Series 3. 109 6cyl 186, 5 speed Nissan cabstar gearbox, mechanical winch, roo bar, kings awning, 50" light bar, roof rack, twin 6"light bars, kings awning tent.

    1969 NO. 5 trailer. ARN 176 464. soft top.

  6. #6
    Join Date
    Jan 1970
    Location
    Irymple, Victoria, Australia
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    2,778
    Quote Originally Posted by 67hardtop View Post
    Just get the head reconditioned by a reputable engine reconditioner. In the old days repco and others would "hone" out the valve guides on holden heads and fit oversized stem valves. A cheaper way to recondition a holden head. Best way is to machine the guides and fit bronze valve guides and then new standard valves. Valves for all common engines are cheap as these days. Also fit hardened exhaust valves and seats to stop valve recession caused by unleaded fuel or LPG.
    You can also get the tops of the valve guides machined so that they take the mushroom type valve seal caps.
    This can be done with the valve guides in situ.

    Cheers, Mick.
    1974 S3 88 Holden 186.
    1971 S2A 88
    1971 S2A 109 6 cyl. tray back.
    1964 S2A 88 "Starfire Four" engine!
    1972 S3 88 x 2
    1959 S2 88 ARN 111-014
    1959 S2 88 ARN 111-556
    1988 Perentie 110 FFR ARN 48-728 steering now KLR PAS!
    REMLR 88
    1969 BSA Bantam B175

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