Leak from the water pump

Is coolant leaking at the water pump?

best option is to replace whole thing

Could be coming from the oil pump or even the valve cover gasket.That's about it for oil.I recently had a leak in the dipstick tube.Are you overheating?Do you have to add oil?If so,how much and how often? Thanks,Greg

make sure your over flow/add coolant bottle is clean...check that the hose from bottle to radiator isnt clogged...also fill add bottle fluid level between add and full mark

the green colour will be antifreeze additive in the water, you should really trace the leak source as it is bound to continue or worsen without repair. You could try a product called CE-LIT which comes in little packets, looks like chopped up grass or silica - add to hot radiator and run at idle for several minutes, it is really good if you can find it where you live. I put a screwdriver thru the rad when fixing my number plate in the snow, huge leak ensued, ce-lit closed it within 5 minutes and I was able to drive off. Never leaked again either, if you cant find that one, get a similar one, but not the liquid leak sealers like barr's as they are ****.

for the water pump leaking, get some engine coolant stop leak from any automotive store, it usually contains pump seal lubricant also. the power surges are a separate problem from your pump leak.

i would correct the leak before anything else and properly bleed system and go from there

Is this an Accord EX? The canister is an oil cooler; there is a seal between it and the block. The cooler is attached with a single large bolt in the center that also has the threads on which the filter is installed.

sounds like your timing belt is a little to tight and the vibration from the belt is the humming you here
loosen the belt but you may want to call the dealer for the spics on tightness of the belt . thx

I've had similar problems and had to have the water pump replaced.