• 4 Stroke Husqvarna Motorcycles Made In Italy - About 1989 to 2014
     TE = 4st Enduro & TC = 4st Cross

  • Hi everyone,

    As you all know, Coffee (Dean) passed away a couple of years ago. I am Dean's ex-wife's husband and happen to have spent my career in tech. Over the years, I occasionally helped Dean with various tech issues.

    When he passed, I worked with his kids to gather the necessary credentials to keep this site running. Since then (and for however long they worked with Coffee), Woodschick and Dirtdame have been maintaining the site and covering the costs. Without their hard work and financial support, CafeHusky would have been lost.

    Over the past couple of weeks, I’ve been working to migrate the site to a free cloud compute instance so that Woodschick and Dirtdame no longer have to fund it. At the same time, I’ve updated the site to a current version of XenForo (the discussion software it runs on). The previous version was outdated and no longer supported.

    Unfortunately, the new software version doesn’t support importing the old site’s styles, so for now, you’ll see the XenForo default style. This may change over time.

    Coffee didn’t document the work he did on the site, so I’ve been digging through the old setup to understand how everything was running. There may still be things I’ve missed. One known issue is that email functionality is not yet working on the new site, but I hope to resolve this over time.

    Thanks for your patience and support!

09 te510 overheat

drav01

drav01

Husqvarna
C Class
Hi guys purchased my first husky about a month ago after taking a long break from riding and so far have been thrilled with how good this thing is. After riding about 50km of tight single trail yesterday, mostly ranging between 1st and 2nd gear, i noticed my thermo fan had not been coming on and eventually it got too hot and started squirting out the overflow bottle. For most of the ride temperature range was between 90-120 degrees (190-250F) weather temperature was 15 degrees (59F) I would've thought the thermo fan would kick in before it got this hot? Fan does work when hooked up straight to battery. Bike runs and rides awesome apart from this fan problem. What do you think is causing this? fan relay or temp sensor or something different? All fluids were checked before ride. I'm running the B&B style radiator guards maybe they are too restricting for airflow?

Any suggestions would be awesome.
 
Get a new temp sensor, or get an infrared temp gun and point it at the base of the temp sensor while the engine is running. My fan comes on at 220F water temp measured this way, which equals about a 190F degree oil temp.
 
I have an 09 TE450, which i did have a few cooling issues with as well(although i was running a safari tank which i found reduced cooling and the environmental conditions were a bit hotter- 30 degrees celsius, but similar riding), however it was explained to me that on the 09 models, the majority of the water that the water pump feeds to radiators is via the left radiator rather than the right where the fan is, and this was by virtue of the way the hoses were designed.
The fix, replace the 09' hoses from the water pump to the radiators, with a 1 piece 2010' kit. The result is pipes that are less restrictive and flow that doesn't favour either radiator, but more importantly gives more flow to right radiator than before whee fan is.
This may or may not help you with your problem, but i've not had any more issues.
 
2 things: getting hot (loosing coolant), and fan not comming on.
The fan NOT comming on leads us to know to a specific problem exsists unless your bike "puked" coolant prematurely and never reached 210'F. However, you seem to know your bike reached 250'F. So back to the fan not working.
The fan not coming on commonly is thought to be the coolant temp sensor- many many failures have been found with that part. But yes the Fan relay could be bad. You already tested the fan for opperation. Test the relay, or spin the Wheel of Chance and buy a new temp sensor for ~$15 and see if that solves it- if it doesn't now you have a spare. Then Get the relay.

Once everything works as it should then go back and determine if your cooling system needs maintinence or if you need to imporove it. Replacing the radiator cap with a 1.6 bar will improve this area some as well as other little tweaks- but but in super tight stuff its hard to keep a big 4 cool.
 
Thanks for the replies. Ended up throwing in a new temp sensor the old one was faulty, added the upgraded water impeller and also have some samco hose kit to put on today with the one piece hose to lose the plastic tee. Hopefully I'll get out this weekend and with a bit of luck should be able to keep the temp a little lower.
 
JUst make sure you have top quality coolant. It is the majpr bit to get right. Also change the coolant at least every 12 months.
I am 245 Lbs and have had 510's 450's and 310's, work the clutch a lot, do mostly knarly ST stuff and have yet to have an over heated bike. I find iridium plugs help the bikes run cooler and start quicker.
 
So. Been out riding again on the weekend still with the problem of the thermo fan not coming on. I've replaced both the temp sensor switch and the fan relay to no avail. Bike did run cooler since doing the impeller upgrade and am now running engine ice as well. In extreme tight stuff the bike is still reaching about 110C (230F) with no sign of the fan coming on. Any other suggestions would be appreciated.
 
The fan should kick in around 90-95 degrees C. This is when viewing the temperature using the Ibeat / HST software connected to the ECU. How are you measuring temps and where from on the bike?

If you have the option I'd suggest running the bike up connected to the Ibeat and seeing what happens. If the temp recorded in the ECU gets above 95 without the fan cutting in and you've replaced the fan relay already you could have a break in the wiring from the ECU to the relay. If the ECU isn't seeing that temp then there is an issue with the new water temp sensor or the flow in the cooling system.

Dave
 
drav01 said:
So. Been out riding again on the weekend still with the problem of the thermo fan not coming on. I've replaced both the temp sensor switch and the fan relay to no avail. Bike did run cooler since doing the impeller upgrade and am now running engine ice as well. In extreme tight stuff the bike is still reaching about 110C (230F) with no sign of the fan coming on. Any other suggestions would be appreciated.
Click to expand...
Drav01 how did you end up with this? I have the same problem with my SMR449.
 
Hi des. Turned out previous owner had swapped over wiring between the fan relay and lighting relay. Swapped it back over got fan to work at the right temps. From memory around 95c. Even with the fan on it was still getting hot on the tight stuff. Ended up selling it to a bloke who was racing motard and bought a yz. So no problems now. Good luck with it.
 
Hi drav01 can you please tell me exactly what wiring they had changed on this? There are 3 relays on my TE450 but they are all the same? What did you swap back?

Cheers
 
You must log in or register to reply here.
Back
Top