Super high temps

  #1  
Old 02-01-2015, 10:51 PM
subyman1440's Avatar
Senior Member
Thread Starter
Join Date: Dec 2011
Location: San Francisco
Posts: 208
Default Super high temps

My 04 600RR (38K miles) has been running hot. Really hot. I've owned multiple 600RR's and I know there is something seriously wrong. My bike runs 200F in 55F weather while cruising at 70mph. Below 40 mph, my fan is on 100% of the time and the temps sometimes climbs to 233F. My fan is on so much that my battery voltage falls below the safe zone and my bike will barely have enough voltage to restart if I shut the motor off. Rarely do I see the temps go below 198F. I've done a cooling system flush, and am running 50/50 pre mix. The cooling system is squeeky clean. I pulled the thermostat today and checked it's operation by heating it up to 185F and it opens with no problem. At 190F it is wide open. I'm thinking I may have a leaking head gasket, or either a bad radiator. My radiator is dinged a bit on outer left edge, but nothing major. Any suggestions?
 
  #2  
Old 02-02-2015, 03:33 AM
Mattson's Avatar
Retired Super Moderator, Tin Star Man & Hurricane Saloon Prospect, ROTM Feb 2015
Join Date: Sep 2011
Location: Vääksy, Finland
Posts: 2,382
Default

Just a thought but is it really hot like do you get heat coming from the engine when sitting at red lights or could it be a faulty temp sensor giving up false data.
 
  #3  
Old 02-02-2015, 05:44 AM
Conrice's Avatar
Retired Super Moderator and Fighterer
Join Date: Nov 2006
Posts: 6,148
Default

If its a head gasket, you have to be losing coolant. Are you?
 
  #4  
Old 02-02-2015, 10:55 AM
subyman1440's Avatar
Senior Member
Thread Starter
Join Date: Dec 2011
Location: San Francisco
Posts: 208
Default

Originally Posted by Mattson View Post
Just a thought but is it really hot like do you get heat coming from the engine when sitting at red lights or could it be a faulty temp sensor giving up false data.
The odd part is the bike doesn't feel hot at all. Not one bit. I'll check the temp sensor.
 
  #5  
Old 02-02-2015, 10:57 AM
subyman1440's Avatar
Senior Member
Thread Starter
Join Date: Dec 2011
Location: San Francisco
Posts: 208
Default

Nope. No coolant loss. But it may be a small leak causing air to leak into the cooling system? I'm going to double check and run a hydrocarbon/block leak tester.
 
  #6  
Old 02-02-2015, 11:19 AM
Conrice's Avatar
Retired Super Moderator and Fighterer
Join Date: Nov 2006
Posts: 6,148
Default

Even then, you'd lose coolant from the gases expanding and pushing coolant into the reservoir - blow-out. If your bike is going through heat cycles, and the level is staying at the top of the radiator, you're not getting a leak or air into the system.

If thats the case, I'm with Matti.
 
  #7  
Old 02-02-2015, 11:29 AM
subyman1440's Avatar
Senior Member
Thread Starter
Join Date: Dec 2011
Location: San Francisco
Posts: 208
Default

True. I'll check the resistance of the ECT sensor.
 
  #8  
Old 02-05-2015, 09:52 PM
subyman1440's Avatar
Senior Member
Thread Starter
Join Date: Dec 2011
Location: San Francisco
Posts: 208
Default update

The problem has taken a new form.

This is what I have done since last time:

-Block test. There is no combustion leakage into the cooling system, meaning that the head gasket is out of the question.

-Replaced the thermostat and gasket for preventative purposes

-Bled the air out of the cooling system

-Coolant Temp sensor works with no issues

Now my bike runs great on the highway. It averages at around 180-190F on the freeway. However, I let my bike idle in a stand still (5-7 mins) to check the condition of the fan switch. The fan kicks on at 220F, but the temp keeps rising while the fan is on at full blast. 221, 222, 223..229!!! Fearing that my temps would continue to rise, I rode around the block for 5 mins and my temp lowered to 210. It seems like at idle, the heat is not dissipating well enough even with the fan. The fan should kick on at 220F and the temps should lower, but that is not the case. After examining the radiator, there is a fat dent on the bottom far left of the radiator where the fan sits.... Could that be causing my problem?
 
  #9  
Old 02-07-2015, 12:00 AM
74demon's Avatar
Administrator and MVN, March 2012/Oct 2013 ROTM
Join Date: Sep 2011
Location: socal 949/951
Posts: 7,945
Default

Sounds like normal temperatures to me. 229 is where a full fairing bike sitting still will run. That little fan will not bring the temperature down. It will only keep it from going over 230.
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
87turbobuick
General Tech
4
04-04-2011 11:52 PM
bootcamp
CBR 1000RR
7
07-30-2008 09:48 PM
mpbigham
General Tech
1
07-05-2008 09:17 PM
chrisf
CBR 900RR
3
10-04-2006 09:09 PM
malbojah
CBR 1000F "Hurricane"
5
08-01-2006 09:31 PM


Thread Tools
Search this Thread
Quick Reply: Super high temps


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.