SV superbike leaking/using coolant
morgan at morganjones.org
Sun Sep 21 08:32:01 PDT 2008
Interesting.. Any thoughts on why this might have happened? Is it
normal for a head gasket to blow again 2 years and 20 track days after
it was been replaced? Is it possible the gasket was not replaced
properly? Are worked motors more susceptible to this?
One thought is that I added a fan sometime last year and before that was
very careful to not let the motor go above 200, now it once and a while
gets to 220 where the fan kicks in.. ie I'm less careful since the fan
Ernest Montague wrote:
> Looks like a head gasket leak trickling down the cylinder. I just
> fixed one that looked like that. From the corrosion looks like it has
> been going on for awhile.
> On Sep 21, 2008, at 8:18 AM, Morgan Jones wrote:
>> Hello everyone,
>> My '99 SV track bike has developed what I think is a coolant leak..
>> It was down probably a cup of coolant after my last track day. I
>> filled it and took it to the track again yesterday. After a full day
>> of riding it is down about 6 inches. It still cools fine but of
>> course that's sort of a lot of coolant for a track day..
>> Well in the middle of the day I pulled off the bodywork and this is
>> what I found:
>> It's definitely coolant--it's just a touch damp and smells like water
>> wetter. There is evidence that there was fluid in the belly pan but
>> very little (like 1/2 cup). The pan is totally dry.
>> I cleaned it up and ran the bike until the fan kicked on and couldn't
>> see evidence of leaking. I took the bike back on the track and it
>> used more coolant.
>> A little background: I bought the bike with a popped freeze plug
>> which lead to a blown head gasket. That was 2 years and 12-20 track
>> days ago.
>> This is a worked bike: 680cc, carillo rods, valve work, race cams,
>> flat slides. The work was all done many owners ago and as far as I
>> can tell it was done well.. it has run like a Swiss watch in the 3
>> years and probably 25 track days I've owned it. It's 90hp at the
>> wheel depending on whose dyno you ask. It is clearly faster than
>> other SVs on the track.
>> Any ideas? I want desperately for someone to tell me that's dripping
>> from somewhere and I just need to look harder.. That's not what it
>> looks like to me. Could this be a leak from the water jacket at the
>> base gasket? Does that ever happen?
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