Question about 2001 Moto Guzzi California Jackal

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Oil leak from small slot directly above crankcase

Recently purchased 2000 Jackal. Oil leak from vicinity of crankcase after 100 miles. Cleaned crankcase, checked bolts for tightness, traced leak to small slot centered directly in rear above where crankcase bolts up to housing. Checked crankcase and transmission oil levels. OK.
Overfill?

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Check that the oil is not leaking from the spark plug.

Posted on Feb 24, 2009

  • Ginko
    Ginko Feb 24, 2009

    When there is oil dripping from the crank case , usually there is a poor seal and too much pressure from the engine.

    Try cleaning the crankcase well with detergent, so that you can understand where the oil comes from.

    Also checkl that oil level is not overfilled.


  • Ginko
    Ginko Feb 24, 2009

    Naturally when I told you to clean the crankcase with soap I mean the external surface... you never know.




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It is most likely seepage between the crankcase and the housing, this is caused by slight warp-age of the case halves and is a common leak/seep area, you can pull the case apart AND REPLACE THE GASKET AND TRUE UP THE MATING SURFACES AND MOST LIKELY CURE THE LEAK, BUT THAT IS ALLOT OF WORK, JUST KEEP AN EYE ON IT

Posted on Feb 24, 2009

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1 Answer

Oil spits out of crankcase filter if bike sits a couple months ? It's a 88ci. S&S


Pre-Twin Cam motors have a check ball (#11 in illustration below):

http://4.bp.blogspot.com/-_S3nmiD7Aiw/TZ5U_VVapEI/AAAAAAAADDM/6m98aYAzxjI/s1600/DSC04354a.jpg

S&S oil pumps operate on the same principal as stock Harley.
This ball and it's cast-in seat can wear over time, and/or get some crud in there, allowing oil to leak past it when the engine is off (gravity fed).

Remove screw cap and remove check ball (a small magnet works great).
Check to see if there is a wear "ring" around it.
Clean it off, and the seat it seals against.
Sometimes, it wears to the point that it needs replaced.

When oil leaks past it over an extended time (like a couple of months), the oil collects in the sump of the engine crankcase.
When you first start the engine, being a "dry" sump engine (the scavenger side of the oil pump is almost TWICE the capacity as the feed side), the oil pump right away tries to send as much of the extra oil back to the oil tank, but some is going to come out the breather(s), and maybe even burn in the combustion chamber.

If this is the case, here's a quick check:

Before starting, check and note oil level in tank.
After starting and running for a bit (5-10 minutes), shut off the motor and recheck the oil level in the oil tank.
If it has risen noticablly, the above is your problem.

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My 2009 1200L sportster leaks oil out the air filter every 2000-3000 miles.It blows onto my exhaust and higher up. I've had my rocker boxes replaced(warranty issue) THREE TIMES- could this be rela


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93 Fatboy oil leaking from vent tube at air filter. oil level is good, not over filled, oil will cover the oil tank on a 100 mile trip


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This was the way the older Shovelheads were done from the factory for years until the EPA made them start running the crankcase vented air through the engine. In 1994, Harley went to the "head breather" system and moved the crankcase vents to the heads. Still, the oil mist in the vented air builds up in the air cleaner on these models as well.

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Sounds like a vacuum leak is leaning out the mixture....check the intake between carb and engine for leaks...another source may be tjhe crankcase seals are leaking.

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1 Answer

Oil from air filter


Due to EPA regulations, since 1985 Harley-Davidson had to move their crankcase breather tube to the air cleaner. The crankcase vented air had to be "recycled" through the engine. As a result, a fine mist of oil in the vented crankcase air condenses in the air cleaner and must be cleaned out from time to time. A lot of riders are purchasing "relocation" kits to change the location of the vented air. These kits are available from Kuryakyn and Custom Chrome.

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1 Answer

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1 Answer

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