SV superbike leaking/using coolant
randygrein at comcast.net
Sun Sep 21 08:50:54 PDT 2008
Well, at 220 the cooling system is under pressure. Could be the leak
was always there but now it's being pushed out instead of dribbling.
Randy Grein, WMRRA #41
On Sep 21, 2008, at 8:32 AM, Morgan Jones wrote:
> 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 is there.
> 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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