F4 heating issue solved - MVAgusta.net
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post #1 of 5 (permalink) Old 07-21-2019, 01:09 PM Thread Starter
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F4 heating issue solved

So I get my F4 312rr 1098 with heating issue. Previous owner said he changed water pump but problem stayed.
I read a lot of advices (3rd vent, another pump/hoses/radiator, engine ice) and done only two things (still don't know which works more):
1) Change my coolant to Motul Mocool (1:20 to water)
2) After flushing coolant system i took off hose of the upper rad and pour mocool there via funnel and selfmade hose. After i saw rad cant take no more I started pour mocool usual way.
You can find video (not mine) of point 2 on youtube it named "MV AGUSTA F4 2004 OVERHEATING PROBLEM SOLVE ! - COOLANT CHANGE"
Now it's stable 97-98C on idling and 103-105 in traffic VS 115-125 and nervous blinking all the way.
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post #2 of 5 (permalink) Old 07-21-2019, 01:18 PM
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I have done the same, except with water wetter, distilled water and 15% glycol.

Today it was +28C outside and cruising temps are 75-78, sitting at lights is 88-95, its very rare to get it to go over 100C, and then the fan cools it immediately!

I have never seen my bike go over 103C!!

F4 750 with Brutale 910S motor
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post #3 of 5 (permalink) Old 07-21-2019, 01:37 PM Thread Starter
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Quote:
Originally Posted by ViggenF4 View Post
I have done the same, except with water wetter, distilled water and 15% glycol.

Today it was +28C outside and cruising temps are 75-78, sitting at lights is 88-95, its very rare to get it to go over 100C, and then the fan cools it immediately!

I have never seen my bike go over 103C!!
I guess that filling rad that way is the most significant way to avoid overheating.
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post #4 of 5 (permalink) Old 07-21-2019, 01:53 PM
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I dont know for sure, but all i know is that my bike runs as cool as my japanese bikes.

I believe its a combination of things, but getting all the air out is a significant part of it.
esq'z me and theknurl like this.

F4 750 with Brutale 910S motor
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post #5 of 5 (permalink) Old 07-22-2019, 09:08 AM
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Check your water pump to be sure the mod is ok. Whatever the result, you'll upgrade the coolant, so...
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