Polaris update

[icr]

Dealer called today, when the update was done the 09 cylinders were honed, it gets new cylinders, pistons, injectors, reeds and head this time. The dealer can't find a cause that they will admit too and I had to answer a whole bunch of b.s. questions for the mothership. i.e. engine temp. egt temps, fuel octane and engine mods.

Insist on having the entire engine blue printed before assembly. If something is out of spec on the crank/case/rods then new pistons is a very temporary bandaid.

Speaking of which, am I the only one who doesn't like that the new pistons are .010 over the old ones, but drop into the same cylinders?

 

[skibreeze]

Insist on having the entire engine blue printed before assembly. If something is out of spec on the crank/case/rods then new pistons is a very temporary bandaid.

Speaking of which, am I the only one who doesn't like that the new pistons are .010 over the old ones, but drop into the same cylinders?

I am shocked that the old pistons were so small, they rocked in the bore badly. My biggest concern was/is the crazy amount of expansion in the pistons.

I'm seriously considering getting the pistons swain coated.

 

[rocket]

Or polaris did not fix the problem...... Hum, thats my vote so far.

Not sure I follow the logic - if the stock fuel map isn't set up to work with the SLP pipe, the update didn't fix the problem? Explain, please....

 

[600xc4me]

Mine is done now as well. Bad scoring on the mag side, even worse on the pto side. Only looking in throught the exhaust valves, so no sure how the intake side looks. Was broken in right, with polaris blue in the tank, and in the gas mixed 40:1. Got one and a half tanks of gas through it, worse than my average last year.
Dropped it off at the dealer yesterday, going to get it fixed and hopfully by the time he has it back together I have a buyer for it. Five motors in 1200 miles and I'm done. All done. M8 is next I think.

 

[thefullmonte]

This is unfortunate news for sure. I'm know we are all curious what the true problem is here. I tend to think it is a combination of a few things. Skibreeze pointed to one of them IMO. The old motors were wore out before they were ever assembled. You could have easily dropped a first over piston in there without doing anything.

However, it pays to note that they are now onto the second generation of this motor. It sounds like the 2010 has different head, cylinders, and bottom end that is not interchange able with the 08-09. Sounds like a whole new motor too me.

 

[sum-it]

down on power

i have a 09 dragon with new up date if you dont have the update yet and sled runs good maby you should think about it i have about 3 tanks gass threw sled it is down at least 10 horse from last year i think polaris pulled a fast one or maby a slow one i normaly dont post on hear but this is total bs i ride about 500 feat

 

[600xc4me]

Yep I wonder too. But I hope I'm not around to fine out once they finally get it figured out. Awesome chassie, but the motor is no good. The 2010 might be better, but I'm not going to be the one to find out.

 

[skibreeze]

It's not the update causing the failure, there is something else going on. Think about it, you had issues scoring pistons, your dealer kept replacing pistons and expected it to be fixed???? Doing the same thing over and over again and expecting a different result IS the definition of insanity, something else is wrong.

1 Was the fuel filter changed?

I found on mine last year that the fuel was being restricted on long pulls but only when 1/2 tank or less. New fuel filter seemed to fix this, ran out of season for extended testing.

2 Has the regulator and ECU been changed out?

The motor was running very lean based on wideband O2 readings, dealer swapped out the voltage regulator and ECU and they went back to normal readings.


You have to have other problems causing these issues.

 

[champyfz450]

It's not the update causing the failure, there is something else going on. Think about it, you had issues scoring pistons, your dealer kept replacing pistons and expected it to be fixed???? Doing the same thing over and over again and expecting a different result IS the definition of insanity, something else is wrong.

1 Was the fuel filter changed?

I found on mine last year that the fuel was being restricted on long pulls but only when 1/2 tank or less. New fuel filter seemed to fix this, ran out of season for extended testing.

2 Has the regulator and ECU been changed out?

The motor was running very lean based on wideband O2 readings, dealer swapped out the voltage regulator and ECU and they went back to normal readings.


You have to have other problems causing these issues.

Im with this guy ^^^^^

 

[gcmci]

Im with this guy ^^^^^

X3
I have done 15 engines and have not had problem with any of them

 

[600xc4me]

It's not the update causing the failure, there is something else going on. Think about it, you had issues scoring pistons, your dealer kept replacing pistons and expected it to be fixed???? Doing the same thing over and over again and expecting a different result IS the definition of insanity, something else is wrong.

I agree, but what is it? No body can figure it out. And there for we keep going through motors. I have one month of sledding left before knee surgery, and was hoping to sled at least a bit in the time I do have. But looks like that won't be possible

1 Was the fuel filter changed?

It was yes. At the same time as the update was put on

I found on mine last year that the fuel was being restricted on long pulls but only when 1/2 tank or less. New fuel filter seemed to fix this, ran out of season for extended testing.

2 Has the regulator and ECU been changed out?

The voltage regulator has been yes. But the ECU has not.

The motor was running very lean based on wideband O2 readings, dealer swapped out the voltage regulator and ECU and they went back to normal readings.


You have to have other problems causing these issues.

You could very well be right, the pistons are not the problem, but what is then?

 

[xmr256]

FYI on pretty much all 08 the intake boots need to be replaced!!!! Ive done about thirty updates now and almost all 08 intake boots if not bad were after pulling on the airbox to get it out. I mean not just a little issue but small pull and the throttle bodies come off with half the boot de laminated.

 

[skibreeze]

You could very well be right, the pistons are not the problem, but what is then?

I don't remember why but my dealer replaced the v.r. and ECU at the same time. They did not test anything in my case, we knew that it was running lean by the O2 readings and replaced both. At the very least I would get your dealer to pull an ECU from a known good sled and see how it goes from there. I know it sucks, but I spent the $$ to put a wideband on mine because we were stumped trying to troubleshoot it. It helped immensely in my case.

BTW, the sled always appeared to be running perfectly, it never bogged or showed any sign of impending doom. It was the guages that tipped me off to the problems. There was even a couple days that I rode with a fuel pressure guage safety wire rigged so I could watch it while riding, the pressure never wavered at all.

 

[600xc4me]

FYI on pretty much all 08 the intake boots need to be replaced!!!! Ive done about thirty updates now and almost all 08 intake boots if not bad were after pulling on the airbox to get it out. I mean not just a little issue but small pull and the throttle bodies come off with half the boot de laminated.

Thanks. Good info. But wouldn't my dealer have noticed that when he put the update on? I also had the air box out and it looked fine. I wasn't looking for that issue, but from what I saw it was good. But I'll make sure they check that. Thanks. Even if that has been my problem till now, I stall wouldn't trust it to get me home. Once a sled has given you this much grief it's hard to believe that anything can fit it. lol I still want it gone.

 

[Meat Head]

Man, some of you guys have to pull your heads out of polaris's azz! They were junk in 08 and fixed for 09, guess what? Junk.. Now the new fix is what? Can we all say it all at once, JJJJJunk. So cheap playing the blame game if it make you feel better... Just calling a spade a spade. If I could sell mines I would, just can't find anyone that stuiped around here... Can't wait to get another walk out of the woods this year.

 

[XtremeSpeedShop]

To be honest I think alot of sleds will be coming back without the tech noticing the intake boots. Some were easy to spot due to the fact they were in two peices, but its one of those things you dont expect to be bad so you could over look it easy. Also I believe the act of yanking out the airbox for the recall is what is going to make most of them fail. They look fine, not like cracking from old age but the rubber separates from the metal cage. Also the injector tips can be damaged easy if not handle correct.

 

[knoba]

800

Polaris has had problems with intake boots before 05 900 and polaris has had engine problems before 900 and 800 liberty,you guys should not be surprised.

 

[sum-it]

bad up date

my 09d8 with up date is lowe on power did compresion test 110 this will never work above 4ooo ft

 

[D808]

Mag melt down

With all the checks you have already done, could you have a
problem with coolant on that side? like some blockage from
the molds etc.

 

[600xc4me]

With all the checks you have already done, could you have a
problem with coolant on that side? like some blockage from
the molds etc.

You mean me? If so I doubt it, cause I'm not burned down, i'm just scored. and it's not from improper warm up. I warm it up till 122 degrees, then hold the throttle just past engagement RPM on the stand to warm to warm up the belt and track, then start going, take it easy for about two miles then lay into it. Have always used this method. And my PTO side was worse than my mag side anyway...