• 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 The previous version was outdated and no longer supported.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!

Overheating Help

B

BCVisin

Husqvarna
AA Class
So I took my 2007 TE450 out to Ocotillo Wells this weekend. The first day I was on a ride to Soops. I have a trailtech vapor computer on the bike that has an inline radiator temp sensor. As I was taking off on the ride, I noticed it was not working, but I decided that I would fix it when I got back.

We were traveling at about 40-50mph along the pole line road, so airflow shouldn't have been an issue. We stopped for a minute to let everyone catch up, and I looked down and saw coolant spilled over the chain and rear shock of my bike. I got off the bike and took my helmet off and then I could hear the radiators boiling. :eek: Upon further inspection, I could see that the fluid had come out the reservoir cap.

I took the tank off, and inspected all hoses and lines, as well as the radiators, and there were no leaks. No fluid was coming out of anywhere else except the reservoir cap. The engine was HOT. Part of the sheath that wraps around my wiring harness, that was touching the chain tensor screw melted. After I heard the radiators stop boiling, I waited a while longer and took the radiator cap off. The fluid looked clear blue (I run Engine Ice) and was full to the top. The oil through the sight glass looked fine, not milky or foamy. It was filled to the correct level. After trying to troubleshoot this on the trail, I decided that it may be the water pump, but I started the bike with the rad cap removed, and I could see the fluid moving. I revved the bike a bit and it started to pump more, so I don't think it was the water pump. I got the Temp sensor working and decided to limp it back.

I got the bike back to camp without it going over 180 F. I topped everything off with coolant (radiators and reservoir) and took it for a ride that night. In the evening It seemed to run fine, and only got over 200 F once, but for the outside temp and the speed we were riding at, that seems higher than normal.

The next day was really windy and a little cold. We went on a 40 mile ride and once again the bike ran fine and only got over 200 F twice, but never more than 220 F. But once again I feel like that was hot for the conditions. Good speed and plenty of wind and a little cold.

I kept feeling the clutch cover on my bike against some of the other 4 stroke bikes and there was a significant difference in temp from my bike and the others. My bike still felt hot.

I still have not figured out the problem and am looking for ideas and some help on what to trouble shoot, and how to test this. With the Baja ride coming up I don't want to be stranded down in Mexico. The bike has never had this problem before, and I didn't do anything recently to the engine or radiators.

Please help! Thanks!

-Blake
 
i had a similar problem but with a sportsman 500 fourwheeler and i was reading in the winter time temps in NY...i cleaned the radiator and thought i did a good job and everyone kept telling to i didnt clean it good enough without even looking at my radiator and i didnt believe them so i took my radiator right off and took the fan off and it was still really dirty..it looked clean but after seriously looking at it there were a few spots were dirt was plugging the radiator causing it to over heat....maybe u have a similar problem
 
Thanks for that. I will make sure to look really closely at that tonight, and report back what I find.
 
Once my hot start was out just a tad after using the choke. It ran almost the same but ran hot/idled low. I caught it after scratching my head wondering what I did...

I have the same bike.
 
I only overheated my TE450 once after a long uphill run through loose sandy terrain in the middle of summer. I did have the left radiator crack recently though. I run regular coolant in my radiators, but I don't weigh very much, so maybe I don't tax the engine all that much.:D
 
Maybe you have something causing a lean condition somehow? (kinda along the lines of the hot start idea)

Good luck
 
Blake,

Have you checked the rubber carb-intake manifold boot for cracks that could cause a lean condition?
 
Have you checked the rubber carb-intake manifold boot for cracks that could cause a lean condition?
Click to expand...

Ahh good point. My carb boot deteriorated last summer causing mucho popping. Never boiled over, but was defenatly lean.
 
Does your TE have the radiator fan and temp. switch in the back of the cylinder next to the intake manifold?
If not, maybe you can buy the OEM fan and just switch it on manually when the Vapor shows hi temps.

dave
 
Not sure. I cleaned the Rad's really good. Checked for any lean situations (the rubber carb boot & the decomp lever) Everything looks good. Bike runs fine, and driving around the neighborhood seems not to overheat. Guess we'll see how it does down in Baja. Good news is that if anything happens, I have a bunch of guys down there who know Husky's and how to fix them, especially Mike and George! :thumbsup:

-Blake
 
BCVisin;19607 said:
Not sure. I cleaned the Rad's really good. Checked for any lean situations (the rubber carb boot & the decomp lever) Everything looks good. Bike runs fine, and driving around the neighborhood seems not to overheat. Guess we'll see how it does down in Baja. Good news is that if anything happens, I have a bunch of guys down there who know Husky's and how to fix them, especially Mike and George! :thumbsup:-Blake
Click to expand...

Have you checked you Rad Cap:D
 
So I changed my oil tonight (first time after I was having this issue) and found that I put the small oil filter (allan head) in backwards. I believe this had a LOT to do with the overheating problem. Not sure thought but I think that was restricting oil flow through the engine. I guess that's what happens when I don't pay attention when changing oil. We'll see if that solved the problem this weekend.
 
Oh my! If the motor was overheating because of restricted oil flow and survived several rides including 2 days in Baja, wow what a testament to this engine design! Though I wish the smaller bag filter would only go in one way.

A call to George is in order to find out what parts would have been starved for oil. Just to know what to listen for and perhaps replace proactively.
 
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