Vanguard 18 blowing oil into filter

Discussion in 'Lawn Mowing' started by Tinkerer, Aug 1, 2005.

  1. Tinkerer

    Tinkerer LawnSite Senior Member
    Messages: 620

    Is it normal for an 18hp Vanguard horizontal to blow oil into the air filter housing? The air filter seems to clog up too fast.
  2. Envy Lawn Service

    Envy Lawn Service LawnSite Fanatic
    Messages: 11,087

    Sounds like maybe a bad block breather valve.
    Is there enough blow-by to get oil in the carb?
    What about enough oil getting into the carb to cause it to smoke?

    I've seen that happen with bad block breather valves...
    And I've seen it come through good valves due to...
    Over filling with oil.
    Accidental over filling with oil due to a short dipstick or long tube.
    And occasionally from the use of SAE30.

Share This Page