Buddy loves his and wouldn't go back to xm and remember 3 times more doos then rest...
850 died on trail in WTF?
- Thread starter Big A
- Start date
oler1234
Active VIP Member
A bore scope would revel a lot of you problems, send it down the spark plug hole and see the top of the piston.
as for a compression test, throttle needs to be wide open. Should be 90% of compression in 3-4 pulls. Skidoo typically run 130-140psi. You sir are way too low on both.
raves will have nothing to do with the test. Reeds could by slowing compressed intake charge flow back out.
as for a compression test, throttle needs to be wide open. Should be 90% of compression in 3-4 pulls. Skidoo typically run 130-140psi. You sir are way too low on both.
raves will have nothing to do with the test. Reeds could by slowing compressed intake charge flow back out.
powpowpowpow
Active VIP Member
You added a turbo, now you need engine work. Sounds like it is on you. Why should BRP care or do anything regardless of what you spent, and don't think for one second BRP is the only company to do this. Go buy an Axys like several have mentioned on here, turbo it and if at some point the engine goes down I'll bet polaris will NOT cover it.
powpowpowpow
Active VIP Member
Zero worries, if engine happens to go down I will drop it off and pick it up when completed. Not much to worry about that eh.
fredw
Active VIP Member
And buy gym membership in between.. Three weeks and counting, for a three hr swap job of motors, ( love warrenty)if I keep this slug I will be looking for a spare motor real soon
- Thread starter
- #46
Big A
Active VIP Member
Thanks for teaching us all a lesson, it’s good to know there’s still people out there that think they’re better than everyone else, thanks for ruining yet another s&m thread that could have been useful
powpowpowpow
Active VIP Member
Heading out for a ride now
skegpro
Active VIP Member
Boyfriend finally came over?
towerrigger
Active VIP Member
Aside from your low compression and that you have a turbo. Your symptoms sound similar to mine, I'm stock other than can. I had a main engine harness go bad last year, the secondary injector wires were rubbing and caused a short. I had that harness replaced and the second harness is now done. The wires to the TPMS sensor were rubbing on a hose clamp. The sled would just die and then start back up without a code. The harness has been updated with a new part number at least 3 times. The harness is a bitch to install and if you have a tech that doesn't take the time to install it correctly you'll have problems.
oler1234
Active VIP Member
ENGINE COMPRESSION TEST
1. Remove body parts as required to access to the
spark plugs.
2. Lift rear of vehicle to clear track from the
ground. Support it with a wide base stand.
WARNING
Prior to measuring engine compression, ensure
vehicle is properly lifted with the track
off the ground.
3. Safely warm up engine.
4. Remove a spark plug.
5. Install an appropriate ENGINE COMPRESSION
TOOL on engine.
Place emergency engine stop switch to OFF position.
Crank engine several times:
– Pull rewind starter several times (if applicable) -
or
– Press START/STOP button to crank engine.
Check if engine compression is according to specification.
SERVICE LIMIT
ENGINE
COMPRESSION
SPECIFICATION
7.5 bar (110 PSI)
1. Remove body parts as required to access to the
spark plugs.
2. Lift rear of vehicle to clear track from the
ground. Support it with a wide base stand.
WARNING
Prior to measuring engine compression, ensure
vehicle is properly lifted with the track
off the ground.
3. Safely warm up engine.
4. Remove a spark plug.
5. Install an appropriate ENGINE COMPRESSION
TOOL on engine.
Place emergency engine stop switch to OFF position.
Crank engine several times:
– Pull rewind starter several times (if applicable) -
or
– Press START/STOP button to crank engine.
Check if engine compression is according to specification.
SERVICE LIMIT
ENGINE
COMPRESSION
SPECIFICATION
7.5 bar (110 PSI)
powpowpowpow
Active VIP Member
He is a great RIDEr
fredw
Active VIP Member
Seen the same as mentioned above got dragged off the truck at the dealer today, started and shut off in a few seconds, no codes, WtF
towerrigger
Active VIP Member
They’ve updated a plastic wire housing that sits on top of the head. It comes with the new updated harness. The way they have the harness routed there is so many places where it can rub a wire out. I found a second bad wire behind the thermostat housing.
NeilV
Active VIP Member
So I was going to pull off my ECU tonight to send away for the turbo flash, but figured I should check compression first, before I void my warranty. Getting 100psi on both sides. Sled was running fantastic last time out. Checked with a second gauge, same result. Not sure if something is wrong or not but either way it's headed to the dealer in the am.
Hey leafmaple is that 110psi service limit the lowest acceptable compression or is that what a guy should expect it to be? 2005km on the machine btw.
Hey leafmaple is that 110psi service limit the lowest acceptable compression or is that what a guy should expect it to be? 2005km on the machine btw.
09 arctic cat m8
Active VIP Member
Big A any updates
LBZ
Active VIP Member
That's the service limit. Typically above 140 psi on a newer engine is the norm.
IIRC you want both holes to be within 10% of each other. One being more than 10% lower indicates a possible problem with that cylinder.
- Thread starter
- #59
Big A
Active VIP Member
Not yet, didn’t get it over to Dave until yesterday afternoon, checked it with buds and found no codes that I didn’t already know about that are unrelated. Leak down and borroscope will tell more today. I did talk to dealer again, a couple of them actually, won’t name them but they both said BRP is on the warranty war path, any and all motor work, even if it’s just a piston, will require pictures and a full buds report.
LennyR
Active VIP Member
Don't have a dog in the fight here but I remember seeing all the comments and suppositions that this new Doo engine was designed and built with boost in mind ?? Not sure if those ideas were the result of inferences or suggestions from Doo engineers (or maybe salesmen) or just Doo zealots needing additional reasons to justify a purchase, but there sure seems to be a vocal backlash now against anyone who boosts or is thinking of it. I get it, unrealistic to expect full warranty if you choose to boost but I would think it should maybe be a bit dependant on type of failure , which component etc. probably similar with other brands but I recall way more talk about this new 850 being built to boost, am I wrong ?
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