Ducatisti Forum - View Single Post - 998 Bayliss - Blown Piston
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Old 26 Apr 08, 09:03 PM   #9 (permalink)
andrewmc83
Club Racer
 
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Join Date: Sep 2007
Location: Liverpool
Posts: 529
Bike: 2008 848 red

Quote:
Originally Posted by Mr.R View Post
The water pump seal failed on my bike (851/916sp) and the fully snth' oil floated on the water, raising the site glass level.
The oil didn't go milky...
I knew I'd put the right amount of oil in the motor so popped the rad cap off and put my finger in, which came out dry.
Fortunatly I check my oil level before and after going out for a ride, so no damage was done.
I stripped out the alternator case and changed the seal only cost apart from the seal was that I had to throw away the contaminated new oil and filter.
As i've said the oil floats on top of the water, your oilpump picks up from the bottom of the sump, so your pump was pumping water to the bigends...
Not good!
I think the 30 min's and 25km's were enough to shag your bottom end which let go causing the rest of the damage.
The knackerd bigends allowed the piston to hit the valves, which let go falling into the combustion chamber.
Which then caused the rest of the damage.
Of course I might be wrong here but...
If anyones got a better idea I'd like to hear it??

Steve
me too! if its gotta top that!
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