GSX-R 1000 K5 Coolant is boiling and overflowing

[JimClark49]

theshrew said:

I have to be honest ive never seen a rad repair like that before, normally I just see people replace the core.

Anyway hope it works and your get riding again. As for the anti freeze check the spec and how much you need in your handbook. Halfrauds or a local place will have what you need.

Thanks mate. Yes the plan was to have it re-cored, but the guy then said he could repair it and guarantee that repair for 12 months. Lets hope this new one holds.

I bought 2 liters of Fuchs Pro Coolant ready mixed (50:50). My bike takes 2.4L of coolant, so I just added 0.4L of distilled water. This will slightly affect the 50:50 ratio of coolant to water, but do you guys reckon I will be OK to run it like this through the cold winter temperatures?

[theshrew]

Yeah that should be ok mate. If your worried you can buy a Hydrometer for a couple of quid to check it closer to the time.

[Momentofmadness]

How are things with the K5? Hope you got it sorted

[JimClark49]

Momentofmadness said:

How are things with the K5? Hope you got it sorted

Hi mate,
Sorry for the late reply, I havent logged in and checked on here for a few weeks.

But the update is that the problem is sorted.

The crack in the radiator repair was the culprit. Even the re-weld they did under warranty failed after two days riding (circa 300 miles). So I bit the bullet and bought a brand new radiator for 582.14. Having ridden the bike for last couple of weeks, everything has been fine.

So in summary, the root cause of problem was a radiator leak, which lead to a loss in pressure, which in turn lowered the boiling point of the coolant and hence my problems.

Hopefully, this thread will help someone else in a similar predicament in the future.

[MajorProblem]

MajorProblem said:

Pre radiator change the bike was perfect?

All you've done is change the rad and the problem has arisen, therefor no need to change the stat etc etc however now you've done that that may be why the temp is lower when running - did you check it against the old stat?

Coolant mix won't make much difference.

It may have not been bled right, or the repair was st?

:-)

[mike150]

Glad to hear you got it sorted, now you can get on with riding it!

Think I would have got pissed off and traded it in!

[JimClark49]

Thanks guys, and BIG thanks for all your comments and help - it was all much appreciated. )

Mike150 - your right, I did think of selling it. Thankfully, it never came to that as I do love the bike very much!

[Momentofmadness]

Excellent news, even if the new rad was a bit spendy