Miltown

Need some help on whats wrong. 2001 f4i

Bike is over heating in the parking lot.

However after i take the bike and run it on the road at say 30-40 mph it cools down

Fan is wired on at all times

Plenty of coolant in the bike.

is it the Thermastat stuck open?

can someone pm me parkers number.

3824

how hot is overheating ?

mine was doing the same, i jsut flushed the system and put in engine ice and its been running cooler.

if its always staying at 240 or something i would put a new thermo in

babyJOKER

better get that thing fix before friday lol
the weather is gonna be hi 85 and lo 65
my 240sx used to have the same problem so i just ran it without thermostat and used diffrent coolant.

MWB BIGMIKE

Thermostat for sure. If the fan is hard wired ti should not overheat.

Brian V

Run Full Engine Ice....

Joker

Umm, if it was the thermostat that was broken the bike would either run too hot or too cold all the time, depending on whether it was stuck open or closed. A thermostat controls the flow of coolant throughout the bike. When the coolant reaches operating temperature and or goes above it the thermostat opens up and allows coolant to flow which then cools down the bike to operating temperature which makes the thermostat close, then this cycle repeats itself over and over. So, if the thermostat was broken and it was closed at all times, the bike would always be overheating. If it was broken and open all the time then it could still over heat but it would also run cooler than factory specs most of the time.

So, with that out of the way I can safely say that I don't know what the problem is but you might want to try bleeding your cooling system.

Miltown

runs 240-250 int he lot, once it hits 250 the red light start flashing and i can hear it boil in the plastic reserve container

Joker

you might have an airbubble somewhere in there...

babyJOKER

lets go to the lot today and check it out

Steve02

i ran thicker oil this last time i changed it and it seems to be running cooler... maybe try thicker oil or i even have a used t-stat for ya w/5k miles on it if ya want to try that.... maybe water wetter also.... just my

matdawg99

i would remove the thermostat completely and make sure your not running straight water it has a lower boiling point than antifreeze...im sure you know these things just starting at the basics

MWBCAPT

COULD BE THE T-STAT THAT DOESN'T OPEN ALL THE WAY. HAD THAT PROBLEM IN THE DODGE.FLUSH THE SYSTEM, NEW STAT, AND USE ENGINE ICE OR WATER WETTER. DON'T FORGET THE MIXTURE OF FLUIDS TO WATER OR YOU'LL BE HURTING NEXT SPRING, IF IT FREEZES. BUT THATS RIGHT YOU KEEP THAT IN A HEATED AREA ? THEN CRACK OPEN THE BLEEDERS ON THE MOTOR FOR ANY AIR.

Joker

Removing the thermostat would help. Also, you can test a thermostat by boiling it in a pot of water and see if it opens and closes properly.

Miltown

well tonight i flushed it with new 50/50 coolant and made sure there was no air in there, no changes. Ii'm debating on either throwing on my 954 radaitor or il probably call around for a thermastat, to me it just feels like when im in the city or or lot its not getting enough air flow coming through, started after i dropped the bike pretty hard.

anyone have a thermastat for the f4i....parker...calling parker still got that blown motor?

Joker

If you just take the thermostat out it won't make a huge difference, especially if you are mainly stunting it because its going to get hotter than usual with a working thermostat anyway. And, if you take the thermostat out and it still overheats then you will know you have a different problem.

babyJOKER

+1 and if u need help anything let me know

Ryan S

jesse: pull the thermostat completly out of the bike....most racers do this modification as well.......

also, remove any of the rubber guards under the airbox that cover the spark plugs and radiator....helps with air flow......i've had numerous 636's and zx6rr's.....EVERY ****ing one of them is different in the over heating issue.....some run hot, some don't....i think it's more internally than anything, i've tried EVERYTHING...including engine ice (which doesn't work in a stunt bike) i basically run my bike till coolant boils out of the over flow......i've done this EVERY day for the last month to this poor bike in china.....they only allow me to run water in it because of race track rules.....which has a lower boiling point compared to antifreeze.....15 minutes and it's pushin steam out LOL

joey b

dont pull the thermostat just take the spring and the middle pin out of it so it slows the water flow down so it can still cool off the water

Miltown

Replaced the thermastat, sensor, coolant, rad cap, fan on the whole time, and it still does it, it has to be the radaitor

runs fine ont he street, but in the lot it hits 250 in about 15-20 min of riding, and then lights start flashing. I think im going to all pro right now to let jim look at it and maybe just order a rad for it.

Miltown

fixed.

it was orginally the fan relay switch, but when i wired the fan on it was spinning the opposite direction causing it to push air our instead of pulling cold air into the radiator.

Thanks to jim from all pro