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VT v6 rocker cover seeping coolant

Discussion in 'VT - VX Holden Commodore (1997 - 2002)' started by commodoredave, Dec 3, 2018.

  1. commodoredave

    commodoredave New Member

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    VT series II V6 sedan (no SC or Turbo)

    Need some help here. Noticed the up side ( the two bolt edge) of both rocker covers are slow leaking coolant ( nulon) when at operating temp. No obvious pressure loss or overheating. No fans coming on unexpectedly. No obvious power loss or chugging.
    Radiator is less than two years and clean, rocker gaskets were replaced around two years ago and less than 20k mileage in that time. Rocker covers are not cracked . No coolant in the oil. Totally got me beat!
    Wondered if the nulon coolant might be an issue like the SCA coolant that is now specifically NON recommended for commodores VT/VX etc. Coolant needs to be topped up about 50-100ml per 200km's.
    Thanks to all
     
  2. losh1971

    losh1971 Well-Known Member

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    Probably a leaking manifold. Very common issue with the Eco.
     
  3. rossimo

    rossimo Member

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    As above, I'd be putting my money on the lower inlet manifold gaskets leaking.
     
  4. Brisbarnz

    Brisbarnz Active Member

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    Nip the bolts up, mine was ever so slightly leaking for years and I just ignored it.
    6 months ago I tightened them up and was quiet surprised how loose the bolts were. Problem solved.
     

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