I was testing out my f4i just a moment ago and I noticed something: I had it on its kickstand and it was on neutral when I revved it to around 10k rpm or more then I noticed a coolant leakage after I turned it off. So I tried it again, this time I was looking at the undercarriage itself when I asked a friend of mine to revv it for me. Though im still not sure where its coming from, my F4i definitely leaks when its revving over 10k rpm.. can anyone think of what may have caused it?

 

Could be leaking from a hose (clamp my need tightening), or your pressure cap is loose or faulty (pressure build up, letting fluid past the cap). Depends where your finding the coolant?. Water pump seal or the dreaded "Stone through the grill".

 

definitely not through the cap or the "stone through the grill" or else wouldn't it leak more instead of leaking when its being over revved? I'll check the water pump seal and the hose later on. Thanks pacemaker!

 

Yeah I considered that its only happening when you built up pressure but even a pin hole will force it out. Just another thing to consider with the pressure cap. Had a few cars that displayed coolant loss & the cap looked fine but the valve was not working.
One way to check is by immersing it in hot water & see if opens.
Hopefully its just a hose clamp that needs tightening

 

Take off your fairing and look for telltale signs of a leak. With coolant leaks, what ends up happening is that the coolant will dry rather quickly and typically will leave a trail of dried coolant residue from it's origin, unless it's dripping directly down from where it's leaking, in which case you will have to detect it as it occurs.

 

Sounds to me like your in the market for a new water pump. Mine was doing the same thing and it turned out the coolant was coming out from the weep hole. Bought a new water pump problem fixed.

 

Well the good news is that these parts are inexpensive so if thats the case then I dont have too much to worry about. Its too bad that work today was a bit long so I couldnt do anything about it. Thanks for all the input gentlemen.