Did a search and saw lots of posts about the HOT VFR's... I was in stop and go traffic for about 20 min - in about 85 deg heat.. and I just happened to look down and noticed my temp light was flashing and the Temp was reading 121 Deg C....
It wasn't long before i got moving again and the temp came down.. I did hear the fan running.. There was no boil over etc..
When I got home I checked everything over... all I found was a a bit of a corroded ground on the fan.. which I am surmising that it maybe was working intermittently or not at 100%
I did notice that there was an over fill of oil from the last oil change.. So I drained the excess out... about 300ml... or so... Coolant was changed with a 50/50 mix earlier this year and from what I can tell everything is working as it should.. I see coolant circulating all the pipes are warm... cap has a good seal... was "burped" -
Basically I am just wondering if anyone thinks there is any damage to the engine?? I have been running an inline 4 for years this is my first V4 - so I am still getting used to the difference especially in the low end grumble...
Just a bit paranoid now... Seems to be running ok now just every nick and hickup I am suspect...
Your comments on an overdone topic are greatly appreciated
121C is a lot, but I doubt that anything got damaged.
As you stated, make sure that the fan has good connection and keep monitoring.
I had some high heat situations but the fan was always able to keep things under control.
Ya 121�c is really hot, but I don;t think its hot enough to hurt things too much. On of the up sides of having an all aluminum , things heat as one, unlike car engines with aluminum heads and a cast block.
You really need to worry when you feel the engine start to change in the way it runs. Air cooled engines start to lose power as they run too hot. I'm sure the same thing would happen on a liquid cooled engine.
But before you get stuck in any more hot weather, I'd take a hard look at that fan and get it cleaned up and working correctly. Than let the bike run in your driveway, the fan should keep it from over heating. It's aslo posable you have a thermostat that is stuck and not opening fully. And that is reducing collant flow and casuing an over heat issue.
Stop and go traffic on my 07 on the hottest of Ontario summer days, never ever have I gotten above 108�c, and that was on a 95�+ day stuck on the 401 in Oshawa on a firday of a holiday weekend.
[image: View Post]NorthernVFRDave, on 07 June 2011 - 10:49 AM, said:
I'd take a hard look at that fan and get it cleaned up and working correctly.
Stop and go 401 traffic on my 07 on the hottest of Ontario summer days, never ever have I gotten above 108�c, and that was on a 95�+ day stuck on the 401 in Oshawa on a firday of a holiday weekend.
I took the leads off the Fan and Removed all the corrosion and used electronic contact cleaners and then afterwards I put it back together I used some sealant I use on our helicopters to keep all moisture away from it..
I tried it out on the way to work today and the fan kicks on at 105 ... more or less constantly.. sometimes around 106... and keeps it steady below 105 now..
Just hope that was the problem...
I did a good coolant flush earlier this year.. so I know there isnt any blockages.. or scale build up... I just know at 121 - you never know what happens... But it did come down really quick once I started to move
You may have air in your left radiator around the fan switch. I changed my coolant and had a similar situation. I followed someones great directions on this web sites. Basically, you let it cool, put the bike on the sidestand, open the radiator, fire up the bike and let it warm all the way. By the bike being on side stand, that will make the right radiator higher so the air will bleed out when coolant begins circulating. I saw the few bubles come out. Let it cool and refill if needed. Works perfect now. Fan comes on at 215f and cools the bike down.
Congrats on the VFR! Great all around motorcycle for so many riding styles. Honda reliability too!
[image: View Post]chasinmojo, on 07 June 2011 - 11:24 AM, said:
50/50 coolant will boil at 265 and thats too hot!
At atmospheric pressure yes, but the rad cap alows pressure to build by 1�F for every PSI of rating on the rad cap. So the normal 15psi rad cap takes the point to 270�F.
Still smoken hot for sure and not good for any engine, donesn't matter who built it.
I'm really suprised anyone could stay on a VFR with the engine running at that kind of temp, the day I took mine to 108�C I was sure the damn thing was on fire under my ass.
[image: View Post]cndhavok, on 07 June 2011 - 10:56 AM, said:
I tried it out on the way to work today and the fan kicks on at 105 ... more or less constantly.. sometimes around 106... and keeps it steady below 105 now..
Glad to hear its working, I think the fan should turn on at 106�C and off at 99�C
But you need to find a more fun route to work, nothing sucks more than hanging out in traffic on a bike, don't ask me how I know :angry:
The highest ever got was a 109c and I can tell u that my right heel was almost frying eventhough I was wearing riding boots. My fan kicks in at 101c or 102c.....notice the temp easily goes higher if the engine oil is older and time to change a new one.
The ecu will shut down the engine At a certain temp to prevent damage, so you Are ok.
About the rad cap, mine was not holding pressure and causing the bike to run hot. It didn't leak externally, but the hot system pressure was zero. Once I changed the cap, all was well.
Next time you ride, get the temp up to 100'c and squeeze one of your rad hoses with a glove on. If it's squishy, you need a new rad cap. The hose should be firm with 16 psi inside it at operating temp.
[image: View Post]NorthernVFRDave, on 07 June 2011 - 10:49 AM, said:
Stop and go traffic on my 07 on the hottest of Ontario summer days, never ever have I gotten above 108�c, and that was on a 95�+ day stuck on the 401 in Oshawa on a firday of a holiday weekend.
This makes me happy.. lol.. I shouldn't need to worry then!!
End of thread · 12 posts recoveredWayback Machine snapshot 16 Jun 2011