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Thread: T3 diesel crankshaft oil leak - vent excess pressure?

  1. #1
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    T3 diesel crankshaft oil leak - vent excess pressure?

    My pal's T3 Caravelle C 1989 1.6D (engine conversion to 1.9D - normally aspirated - dont know the donor) is leaking lots of oil from inside the timing belt cover (I thinks its from the crankshaft pulley) and also leaking from the clutch bellhouse. Loads of oil.
    I think its just engine oil. I can't smell gearbox oil.


    I washed the engine so I can see where oil drips.
    I've had the rocker cover off. The cam shaft looked very clean and silver.
    My vw experience is mostly petrol 4 cyl golf engines and cams usually look a dirty gold colour, only the lobes look silver.
    Anyway, the rocker cover has a rubber hose that feeds to the inlet manifold - it seems NOT blocked - good.
    The cover gasket wasn't the cause the leak, still I sealed it with silicon in case, left a few inches above the glow plugs without silicon.
    By design, the rocker cover doesn't have a filler cap. So, the rocker is sealed from the atomsphere.


    Isn't it a bit suspicious for both crankshaft oil seals to leak??


    I wonder if theres too much pressure in the crankcase/sump, combustion gases forcing the oil out??


    Is there a quick way to vent the crankcase to the atmosphere, maybe via an oil-catcher-tank.


    I suppose the dipstick tube is one possible route.

    Any advice welcomed. Regards
    VW Camper fanatic
    1985 T25 Camper 2.0 2E engine transplant
    1985 Golf Cabriolet 1.8i, DX
    1994 Golf Driver 1.8i, ABS
    Old brit bikes too.

  2. #2
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    I just seen on a 1.9 TDI (eng code AHU) there is a little plate with two bolts on the eng block, sites between the fuel distributor and the vacuum pump. The plate has pipe and a rubber hose going to the plastic circular air thingy mounted above the rocker cover.
    On the Caravelle the eng converter simply put a blanking plate instead of the one above.
    I think, I need to get the 1.9D vented plate and route a hose somewhere.
    Anyone breaking a 1.9D??
    VW Camper fanatic
    1985 T25 Camper 2.0 2E engine transplant
    1985 Golf Cabriolet 1.8i, DX
    1994 Golf Driver 1.8i, ABS
    Old brit bikes too.

  3. #3
    Junior Member
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    Anyone interested in the outcome?
    VW Camper fanatic
    1985 T25 Camper 2.0 2E engine transplant
    1985 Golf Cabriolet 1.8i, DX
    1994 Golf Driver 1.8i, ABS
    Old brit bikes too.

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