ER5 Coolant.

[Willson]

I open the radiator cap (under the tank), fill it up, and alas comes coolant leaking out of both sides of my engine block.

There are two what look like overflow holes in the side of my engine, and the coolant comes straight back out of there.

I am led to believe there I should be able to see the coolant when I take the radiator cap off, but I cannot.

Could I have a broken pipe? Or is it a thorough strip down job?
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Riding: '00 Suzuki SV650S. Previous: '99 Kawasaki ER5 - sold, '02 Suzuki GZ125 Marauder - sold

[stinkwheel]

Those drain holes (small holes between the fake cooling vanes on either side) drain the sparkplug recesses.

So, coolant is leaking into your sparkplug recesses.

Have you had any work done on the engine recently (eg, tappets checked)? If the rocker cover has been removed for any reason, it necessitates removing two steel coolant pipes which pass down through the rocker cover first.

If you don't fit a brand new o-ring round the end of those pipes when you re-fit them, they will leak coolant into the sparkplug recess which in turn comes out of those drain holes.

In any case, if you remove the tank, it should be obvious where the coolant is coming from, there is a very small area it could be leaking from to land up in the sparkplug recess. It will be coming from around one of those two pipes, where the rubber hose joins those pipes or from a split in the rubber hose.

Yes, under normal circumstances, the radiator should be brim full.
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I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.