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 The previous version was outdated and no longer supported.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

Is this a sign of something bad ?

Rearwheelin

Rearwheelin

Husqvarna
Pro Class
Scared rubber seal on radiator cap that was not sealing correctly allowing coolant seepage.
102_0763.jpg



I flipped the seal over...
102_0764.jpg


I have never seen radiator fluid foam like this ! My bike has leaked fluid the last couple rides. I do have the rads really full too.
View: http://youtu.be/-SgelA64trY



I'm worried the head gasket is bad :eek: I recall watching the stock radiator fluid once and noticed the system really moves a-lot of fluid, but the foam is something new when i put the Peak 50/50 in, didnt notice it foamed untill today.
102_0765.jpg
 
Mine had the same issue, took it into my dealer and apparently it was blown head gasket!! Lucky it is still under warranty. Seems this issue is starting come to up a bit more which is not good.
 
I had a leaky head gasket and I still didn't have any bubbles in my coolant like that video. I think you have a classic blown head gasket. Here's a pic of my small leak where the fire ring of the combustion chamber was broken in one tiny spot, in between the layers of gasket.
HuskyGasket4_zps7745a74b.jpg
 
I just dumped the old radiator fluid flushed with distilled / refilled with distilled and it's still bubbling a little and will push water drops out the overflow line . gues I will run some compressed air into the spark plug hole and see if it comes out the radiators :( bike has under 1000 miles , hope I'm wrong
 
One more vote for blown head gasket. On street bikes with oil/water heat exchangers those are a culprit, but I doubt the 449/511 have one of those, that would be too easy a fix. :-)
 
Hmm, so should we be running our motor with the cap off to see if we have bubbles???

I'm curious, would you have known there was an issue if you did not notice your cap leak or would it have been too late only presenting itself with bigger signs of something going wrong, loss of power, hesitation, blown motor, whatever?????
 
I went and bought a compression tester today but it did not thread into the plug hole because of the adapter threads didn't go deep enough, only about 1 turn so was unable to get good air into the cylinder without it poping out. I am still not convinced that the head gasket is leaking yet. When idling my bike today with the rads really full I noticed about the time the water begins to boil the fan kicks on.. Also the amount of coolant in our system is hardly anything and the water pump really moves a-lot of fluid.. I have a hunch that the heat transfers really well at the cylinder and the cheap Peak antifreeze isn't up to the job and it's flashing steam bubbles at the cylinder possibly causing my cap to go bad after several rides. ( I really work my equipment sometimes )... I'm going to score some XF coolant and try that ... I have been trying to buy a gallon of Evans from a friend who has some in his garage just sitting there for about two weeks now :) It was neat to see how well the fan works , with in a couple seconds of boiling it kicked on and settled the boiling really fast.
 
If your head gasket is leaking it will do more than cause bubbles or foam. Combustion gases are HOT and highly pressurized. They will pressurize the cooling system and force coolant out the overflow while causing the coolant to boil quickly. The obvious sign is that you keep needing to fill up your rad. If the rad level does not change it may just be cheap coolant. Try some straight water since it doesn't foam. I agree, it doesnt alway get into the oil. Cam.

I had an old truck where the coolant went into the cylinder instead and was boiled. It was like driving a tea kettle, huge clouds of antifreeze smelling steam boiling out the exhaust pipe.
 
ridge in cap seal is normal. played the vid but no sound for some reason. if yer bliping the gas it'll blast out the filler. if so it looks ok to me from what i saw. it bubbles a lot with the cap off. under pressure it dont so much, just like oil. peak is junk. use a waterless coolant w/o the silica in it. bikes usually have plastic impellers et. al. car coolant is crap. compression tester wont tell ya jack about the gasket. leakdown tester might but dont over do it. just be REAL careful with sustained pressures in any system. easy to make a problem that wasnt there. if it starts runs and drives fine and dont use a ton more of this or that than its posed to yer good in most cases. run a bike hard off road you can use an oz of coolant easy per tank maybe more. most coolant gets huge when it gets hot. has to go somewhere, as it is posed too. once it hits the recovery it can evap off. water steams off etc...

HG fire ring breech indicators: compression gasses in the coolant (CO test), causes pressure in the cooling system, forcing a LOT of coolant out past the cap, subsequent o/h.

HG water jacket seal breech: after shut off or during/after high stress runs the coolant can cross-over into the oil drain back gallery causing intermix. (creamy frothy milk shake, complete intermix, not condensed moisture etc) and/or steam the piston clean and rust the plug overnight. sweet smell exhaust etc.

Call Zipty and get the FX+. you have a wicked nice bike, dont skimp on vitals like fluids it depends on to live. and get that peak sht outa there NOW that stuff's total garbage.
 
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