Water loss

Tony · Post by **Tony** » Fri Apr 25, 2008 1:36 pm

My KR1S seems to blow a bit of water out of the radiator into the header as it should when the engine heats up but never seems to draw it back in when it cools down. I've checked the rad cap and it's fine and the bike dosen't overheat from too much loss so is this normal for these bikes as my brothers KR1 does the same thing?

SHimmer45 · Post by **SHimmer45** » Fri Apr 25, 2008 1:52 pm

my old KR1-S used to do this, the rad cap etc was fine etc and the head gasket was new,

to avoid the problem id find a level in the coolant system that it stopped spitting the water out and kept it at that.

i did 10k miles like this so i dont think its a big problem.

mgtkr1 · Post by **mgtkr1** » Fri Apr 25, 2008 3:17 pm

should be ok, just dont over pressurise the system. the pressure needs to escape to a point, otherwise something will give. i use a bottle as a header tank with a bit of water to cover the end of the pipe so the vaccum effect sucks it back in as it cools down.

JanBros · Post by **JanBros** » Fri Apr 25, 2008 8:06 pm

mgtkr1 wrote:just dont over pressurise the system

how could you do that, unless your head gasket is gone

Tony · Post by **Tony** » Sat Apr 26, 2008 9:42 am

Thanks for your replies, I'll keep an eye on it but stop my worrying about it now.

dirk · Post by **dirk** » Sat Apr 26, 2008 10:05 am

Hi

My makes the same.
The expansion tank is filled till a bit under minimum an sometimes some coolant runs out of the hose.
I thought also everthing is wrong but the engine runs fine.
I have no temperature problems.

Think (hope) this is no problem.

Dirk

Tony · Post by **Tony** » Sat Apr 26, 2008 12:50 pm

That is exactly what mine does, thanks for your post.

coyote · Post by **coyote** » Tue Aug 05, 2008 2:15 pm

is there no solution for it?
i have two of this with the same problem

Charles · Post by **Charles** » Tue Aug 05, 2008 2:18 pm

coyote wrote:is there no solution for it?

You're sure you head gasket is ok?

groeten,
Charles

coyote · Post by **coyote** » Tue Aug 05, 2008 4:19 pm

the first i bought has its third new pistons ( every 10000 km) and had that problem since i bougt it

it seems the reservoir is to low to suck the spoiled water back to the radiator

mgtkr1 · Post by **mgtkr1** » Tue Aug 05, 2008 8:25 pm

JanBros wrote:
mgtkr1 wrote:just dont over pressurise the system
how could you do that, unless your head gasket is gone

dont think it applies on the kr due to the rad overflow/header tank layout etc but when i first built the yamagamma i mistakenly plumbed the bypass hose (on the ypvs cyl head) directly into the gamma radiator which should go off to a catch bottle etc and no straight back into the system effectively making it closed circuit so that the vapour/steam etc has nowhere to escape thus causing excess pressure as if the head gasket was to blame which caused overheating. 2 head gaskets later, i clicked!! needed shooting for that one!! this is what i meant by over pressurising the cooling system. anyone with a ypvs will be familiar with the said bypass hose/ypvs cooling system been different to the kr/gamma etc.