FZRSupport: the FZROnline Archive

Hi guys i changed the seals on my waterpum pought a new radaitor cap problem is water is coming out by the cap and somtimes all the water in radaitor get pushed to overflow bottel doesnt hold water tell me can it be the cap that the pressure is to little or what cap is 0.9 tell me how much pressure is you caps and what els can be the problem plz

it may be a head gasket issue pressurizing the water jacket. Have you checked cylinder compression?

Hi thanx stig i dont have a compression tester at the moment is there another way to check it

Is it overheating? That would be the first order of business...get a grip on what the coolant temp is. Boiling is boiling. No cap, or coolant system will hold that in.

I hear they used to drive ships and locomotives with boiled water

Hi it can stand and idle for long without the cap but when i drive it get hot quick coz all the water from the radiator gets out thru the cap and overflow bottle but i have never driven it till the gauge get near the red can anyone tell me the pressure on their radiator cap plz mine is 0.9

Given your user name, I assume your bike is an '87-88; according to the manual, the opening pressure for the rad cap should be 74-103 kPa / 0.75-1.05 kg/cm2 / 10.7-14.9 psi. I would assume your cap is rated for 0.9 kg/cm2, and is thus correct - but that doesn't mean it's working properly ...

It could be a faulty cap like the one I bought for my bike. Non original cap, wouldn't hold any pressure on the bench tester radiator out. So I just re-used the old cap. And looking at the two caps I couldn't see any difference. Mystery. Why not put your old cap on and try?
If you have leaky head gasket you would probably see bubbles in the rad, cap off.

Hi guyz its ok now but when i go past 7000rmps it pushes the water out by the cap and overflow bottle what can that be now headgasket or faulty cap its a new cap altanator died on me saturday still searching for the prob