Install the app
How to install the app on iOS

Follow along with the video below to see how to install our site as a web app on your home screen.

Note: This feature may not be available in some browsers.

  • Don't miss out on all the fun! Register on our forums to post and have added features! Membership levels include a FREE membership tier.

2012 Blown Engine (Pics and Video)

All these failures I've been seeing appear to be mild Deto. Are all these failures being caused by people running on the premium resistor running ethanol fuel? They all seem to fail in the same manner, slight swell and scuff followed by a better developed scuff and score followed by failure. I don't know of a single failure to date by anyone running on the ethanol resistor.

I lost my motor on my 11 when I was running the Ethanol resistor.
 
Well it appears that they POLARIS continues to ignore the piston- skirt and case alignment design flaw problem that has plagued them since 2008 and carry on the tradition into 2014.
Yep and that collor on the drive shaft Hope it get the PDI- cause it will toss the drive out in no-time.
It is mind numbing that this is allowed to continue----guess it doesn't happen enough to fix it.... and all of us better get the extended coverage 4- sure
 
When my cousin's 11' injectors went out last year it also caused the 800 cfi to run on one when they went bad. It would randomly wake up and run on two after monkeying with it.

If I am in the backcounty and my sled starts to act up and it just a couple years old under warranty, I am going to limp it out back home too.
 
All these failures I've been seeing appear to be mild Deto. Are all these failures being caused by people running on the premium resistor running ethanol fuel? They all seem to fail in the same manner, slight swell and scuff followed by a better developed scuff and score followed by failure. I don't know of a single failure to date by anyone running on the ethanol resistor.

What are all the signs of mild deto?
 
Do they ask you if you have mechanical skills when you buy a 800 and then tell you if you dont to buy a 600. Dumbist thing Ive heard.

Yeah, almost as dumb as your spelling.

Point I'm trying to make is that if you are not willing to listen to your motor and fix a small problem before it turns into a big one, then maybe you should ride a sled that doesn't have such a strung-out engine? Do the Top Fuel guys tear there motors down after each pass or just say screw it...run it till it breaks?

Think about the amount of power these are making per cubic inch, and then compare it to anything else you own(or wish to own).

Compression testers are cheap, go and buy one at your local Harbor Freight and plug it in after your ride...it takes 5 minutes to do. Preventative maintenance makes MUCH more sense than riding it till it breaks, sob story to your dealer, and then create a thread on your favorite forum to talk ****.
 
And think about what this thread is telling some joe schmoe that gets on here.

Looks under Polaris Pro Ride, see's "2012 Blown Engine," opens and scrolls through the pictures, and then presses the "back" button.

Now what did that just tell that guy? He probably left this forum thinking "Wow...if I buy a Polaris, it's gonna blow up!?" Right??

It goes back to my original thread a while ago that it's always easier to point the finger somewhere else than except responsibility and own up to your potential error(s). I don't work for Polaris, I don't ride a Polaris, but I am tired of the constant bashing day after day after day when NObody wants to except fault. Not one. Friggin. Time.

So whatever...you people can keep thinking Polaris "just gets away with it," if you're really that concerned about it, you guys gather up all of your "faulty" items and go to the Better Buisness Bureau. Knock yourselves out.
 
And think about what this thread is telling some joe schmoe that gets on here.

Looks under Polaris Pro Ride, see's "2012 Blown Engine," opens and scrolls through the pictures, and then presses the "back" button.

Now what did that just tell that guy? He probably left this forum thinking "Wow...if I buy a Polaris, it's gonna blow up!?" Right??

I wrote this thread to inform people from my experience. To help the guy who didn't get the extended warranty. Maybe they might come across the same situation and think back to this post and think about saving their engine so they don't have to buy all the parts themselves. Why would I hide what happened to me?

It goes back to my original thread a while ago that it's always easier to point the finger somewhere else than except responsibility and own up to your potential error(s). I don't work for Polaris, I don't ride a Polaris, but I am tired of the constant bashing day after day after day when NObody wants to except fault. Not one. Friggin. Time.

So whatever...you people can keep thinking Polaris "just gets away with it," if you're really that concerned about it, you guys gather up all of your "faulty" items and go to the Better Buisness Bureau. Knock yourselves out.

Not once in this post have I bashed Polaris. I knew d@mn well about the risks of buying this sled. I wouldn't have bought it without the four year warranty. I love my pro! This platform changed the game. If I blow another engine I know I had a kick *** time up to that point. Yes ill still do whatever it takes to prevent it but I'm not going to start riding like a child.

You are the only thing ruining this thread. You haven't supplied any information that was accurate and a lot of it makes no sense.
 
I lost my motor on my 11 when I was running the Ethanol resistor.

X2 lost the pto side and I do regular compression test and after the det I and the dealer were amazed that the pto side actually had better compression than the mag side

Sent from my DROIDX using Tapatalk 2
 
Yeah, almost as dumb as your spelling.

Point I'm trying to make is that if you are not willing to listen to your motor and fix a small problem before it turns into a big one, then maybe you should ride a sled that doesn't have such a strung-out engine? Do the Top Fuel guys tear there motors down after each pass or just say screw it...run it till it breaks?

The irony is strong in this one. :face-icon-small-dis
 
Polaris engines are AWESOME! Slightly better than their driveshafts. Which are slightly better than their drive belts. If guys would just stop riding them they wouldn't break so much. At least they are super easy on warranty Jones sorry for your trouble, thanks for posting. I was surprised you tore it down yourself. Do you know the dealer well enough to get your warranty after that?
 
Mild Deto will yield a slight sandblasted type appearance on the edge of the piston dome with extremely high temps being transferred to the piston, a slight swelling of the piston will occur that may result in scuffing. Major Deto can usually be heard by the operator as a knock, ping, or miss when on the gas at high RPM at high temps. A noticeable sand blasted affect will appear on your dome, your piston will swell and typically a dime sized chunk of your dome will break off, usually on the exhaust side of your dome. Alot of the failure pics I see show all the above systems. I ride with alot of guys running alot of Pro's, no one has had any issues over the last 2.5 seasons except myself who lost a motor at 2,300 miles. I am the only one in the group who would run on the premium setting when I was supposedly buying pure gas, everyone else is paranoid and playing it safe, maybe I should have played it safe also. Has polaris come forward with anyone and said that it is postively deto, maybe I'm barking up the wrong tree. They replaced my topend with no questions asked, which was great, but did I create the failure.
 
Polaris engines are AWESOME! Slightly better than their driveshafts. Which are slightly better than their drive belts. If guys would just stop riding them they wouldn't break so much. At least they are super easy on warranty Jones sorry for your trouble, thanks for posting. I was surprised you tore it down yourself. Do you know the dealer well enough to get your warranty after that?

Actually the dealer tore it down and I asked them If I could come in and take some pics after they had it all apart. They seem good about me bugging them for the last four days.
 
Nice pictures of something that has been going on for six years now but I would think by now any Poo owner knows what their getting into when purchasing an 800 . The question is why are people blaming the fuel ? Is it like when the fuel filters where the cause because people didn't change them at least twice a year ? Or could it be caused from not adding oil in the fuel even though it's injected ? :doh: Like I said most know what a pile this engine is but that's the price of total terrain domination . Maybe it's time to start putting Doo engines back in .
 
Mild Deto will yield a slight sandblasted type appearance on the edge of the piston dome with extremely high temps being transferred to the piston, a slight swelling of the piston will occur that may result in scuffing. Major Deto can usually be heard by the operator as a knock, ping, or miss when on the gas at high RPM at high temps. A noticeable sand blasted affect will appear on your dome, your piston will swell and typically a dime sized chunk of your dome will break off, usually on the exhaust side of your dome. Alot of the failure pics I see show all the above systems. I ride with alot of guys running alot of Pro's, no one has had any issues over the last 2.5 seasons except myself who lost a motor at 2,300 miles. I am the only one in the group who would run on the premium setting when I was supposedly buying pure gas, everyone else is paranoid and playing it safe, maybe I should have played it safe also. Has polaris come forward with anyone and said that it is postively deto, maybe I'm barking up the wrong tree. They replaced my topend with no questions asked, which was great, but did I create the failure.

Think its possible the deto happened after the skirt broke? Hole in the case causing an in rush of air leaning that cylinder out? I feel that if there was a deto issue the PTO cylinder would show signs of it as well.
 
These engines have a serous tolerance issue from what I can tell and poor quality control at the factory .
I own a business and know what it is like to get good help it is hard to find anyone who cares about the end result.
The question is do your riding buddies who ride cats and ski doo baby their engines no way they do not even come with temp gauges, I have never seen any of my chums add extra oil to them either ,they pull the rope and go. Mean while I am setting their waiting to come up to temp before daring to hit the flipper , or stopping half the way up the trail to pack snow on the tunnel .
IMO cat and ski doo are catching up fast and if yamaha gets their heads out of the clouds Poo is in trouble unless they can get this 800 some more ponys and reliability.
Bad new travels fast and bad engines don't travel at all .
 
The news can't be spreading that fast Beamer. Poo still is selling some.

Maybe all the news isn't the same in every paper. If yours has bad news you know what you need to do.
 
I guess it's possible detonation has nothing to do with it, but I've seen some 800's where both cylinders went down simultaneously with classic symptoms showing on both. Reflecting back on the day when I picked up my sled the dealer told me to never run on the premium setting because you don't have any idea what quality gas you're getting and there had been several gas quality related failures.
 
Last edited:
2013 engine

--make sure to get a '13 model year engine replacement

--with a new motor, you would have better resale,but then again, you may want to keep your chaincase drivetrain on your '12

Good point. Polaris fixed the skirt problem in 2013. Get a 2013 short block and ride it like you stole it.
 
I guess it's possible detonation has nothing to do with it, but I've seen some 800's where both cylinders went down simultaneously with classic symptoms showing on both. Reflecting back on the day when I picked up my sled the dealer told me to never run on the premium setting because you don't have any idea what quality gas your getting and there had been several gas quality related failures.

Finally an educated response to jones problem, thanks Adrenaline. Far to often you have posts in threads like this that do nothing but bitch and moan and cry. It's like friggin broken record and its the same guys over and over.

Ya ya we know there are issues with this engine, do any of ya add any constructive advice to guys that want to avoid these issues. Or maybe help the guys try to extend the life of this motor? No, no that would be to positive, most just want to moan and moan and moan.

Sorry Jones that sucks hopefully you can get some sound advice for your next motor so you can make it last. So your not like that other guy that goes through 4 motors in 4 years and no one wants to ride with him anymore. But he gets on SnoWest and bitches in evrry thread that pops up.

Rant over.
 
Premium Features



Back
Top