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chunks of pistons just broke off???
- just put two new pistons in and chunks just broke off??wtf
started by piped7
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January 6th 2009 at 8:18 AM
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piped7
loud pipes!!
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24 Posts
Group: Members
Member Since: December 17th 2008
Location: minnetonka, minnesota, USA
Current Sled: 01 polaris 700
2008-2009 Miles: 15
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2001 polaris 700 and i just put new pistons in it and on my first test drive is lost power. i took the pipes off and there was chunks of pistons in there?? i took the head off and both of the pistons were broken around the ring of the piston?? has any one heard of bad pistons?? i think that is faulty parts!!
TOLLIE
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Site Supporter
Group: Site Supporters
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January 6th 2009 at 8:27 AM
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MJay
Sledaholic
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6184 Posts 
Group: Members
Member Since: March 16th 2004
Location: Goose Bay, Newfoundland, Canada
Current Sled: 2006 Arctic Cat M7
2008-2009 Miles: 450
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Why did you replace both pistons in the first place? Did you fix the original problem that caused the rebuild? Are you sure the new pistons were installed right? Are they the right pistons?
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January 6th 2009 at 8:38 AM
[ Modified January 6th 2009 at 8:38 AM
]
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Bahlduzzi
Advanced Member
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1651 Posts 
Group: Members
Member Since: November 29th 2004
Location: Sparta, WI, USA
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Honestly, the first thing I thought of was that you put the pistons in backwards.
Honestly, the first thing I thought of was that you put the pistons in backwards.
"It is what is is"-Brett Favre.
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January 6th 2009 at 8:49 AM
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dtmmil
Senior Member
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3182 Posts
Group: Members
Member Since: January 27th 2007
Location: Hawley, MN, USA
Current Sled: 99 xc700
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Were they just broken or melted?
Clutched
Jetted, boyesen reed petals, boost bottle, 98xc carbs slides, 1371 needles, gutted air box
Homeade 7 1/2" riser
Homeade suspension drop brackets
shortened and blackened windshield
powermadd handguards
144 conversion, tracks usa extensions, custom tunnel extension and rear bumper, IQ flap, 1.25" track
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January 6th 2009 at 8:52 AM
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polarisorbust
Eat my roost !!!!
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627 Posts 
Group: Members
Member Since: December 21st 2005
Location: Morley, Michigan
Current Sled: 1998 XC 700
2008-2009 Miles: 1178 miles
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what brand of pistons? did you take the sharp edge off the ports? break it in properly?
98 XC700 97.3 mph 1000 ft.
00 XC500SP 45th Anniversary Ed.
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January 6th 2009 at 9:31 AM
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whitexc
Average Member
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948 Posts
Group: Members
Member Since: February 19th 2006
Location: Pendleton, NY, USA
Current Sled: XC
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Something is wrong here because I find it hard to believe you got two bad pistons and they both broke the same and in a matter of minutes???? What brand pistons and were the cylinders freshened or at least checked?
Polaris...it IS the way out!
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January 6th 2009 at 12:05 PM
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CanadianXCR
New Ice Ripper!
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1642 Posts
Group: Members
Member Since: December 18th 2004
Location: Barrie, ON, Canada
Current Sled: 1998 XCR 440
2008-2009 Miles: 0
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Sounds like operator error here.
98 XCR 440 / Woodys / Hot Seat Performance / Shock Pros / Cobra / Sportech / Fox / TEAM / Camoplast Ice Ripper
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January 6th 2009 at 3:11 PM
[ Modified January 6th 2009 at 3:12 PM
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MX4life
Rain sucks...its like a no name brand snow
MX4life stupid drivers strike.......still cant get my license.
Updated Wednesday at 9:47 PM
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471 Posts 
Group: Members
Member Since: December 9th 2007
Location: oshawa, Ontario, Canada
Current Sled: 1989 tundra 250 LT
2008-2009 Miles: 200
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Quote originally posted by Bahlduzzi Honestly, the first thing I thought of was that you put the pistons in backwards. x2
1989 Ski-Doo 250 Tundra LT
2002 Honda CR125R
1986 Honda XR100R
go BIG or go HOME!
I'm just a backyard baby with a diapie full of dreams. Tommy, The Rugrats
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January 6th 2009 at 3:46 PM
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800storm
900 fusion
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555 Posts
Group: Members
Member Since: February 19th 2007
Location: webster, ny, USA
Current Sled: 2005 900 fusion
2008-2009 Miles: 600
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January 6th 2009 at 5:14 PM
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Ugly_old_Poo_kid
techno-bumpkin
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1079 Posts
Group: Members
Member Since: March 18th 2007
Location: Walworth, NY, USA
Current Sled: 05 Edge & Frankenstorm II
2008-2009 Miles: 165
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Were the jugs ported?
95 - Storm 800 - Modded - AKA: FrankenStorm - Totalled near 100mph at Tug Hill!
96 - XLT/SP with Storm 800 trip/trip and now EFI - FrankenStorm II lives...
95 - RXL -- Sale Pending --
05 - Edge 800 long track - Stayin' stock for now..
---------------------------------------------
It made me more compassionate, more empathetic, more nurturing...
I FEEL LIKE I'M TRAPPED IN MY OWN WORST NIGHTMARE!!!
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January 6th 2009 at 6:18 PM
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polaris1man
Average Member
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738 Posts
Group: Members
Member Since: December 22nd 2007
Location: Nashwauk, Minnesota, USA
Current Sled: Polaris SKS700
2008-2009 Miles: not many
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Or was the crank bearings shot?
Three-1999 Polaris SKS700's
2000 Polaris SKS700
2000 Polaris Ranger 6x6
2007 Polaris Sportsman 800 EFI X2
2000 Yamaha YZ 250
1996 Yamaha WR250
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January 6th 2009 at 7:43 PM
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cat-sass
Average Member
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581 Posts
Group: Members
Member Since: January 15th 2005
Location: Gladstone, MI, USA
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Hard to give a proper diagnosis without seeing pics, but
sounds like both rings got hung up on the ports and ripped the top
off the pistons.
Pistons in correctly?
Ring end gap set properly?
Rings located on locator pins properly?
Throw up some pics, and give some more info.
If you're not
livin on the edge,
Then you're
takin' up space!
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January 6th 2009 at 7:55 PM
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Ultra680
Senior Member
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2235 Posts
Group: Members
Member Since: June 5th 2004
Location: Anywhere, Everywhere, USA
Current Sled: 2000 XCR 800
2008-2009 Miles: 1300
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Sounds like the pistons were installed backwards. Again why did you replace them in the first place?
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January 6th 2009 at 8:03 PM
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PolarisEdge
Polaris Tech
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1180 Posts
Group: Members
Member Since: November 13th 2005
Location: Miramichi, New Brunswick, Canada
Current Sled: '05 IQ 900
2008-2009 Miles: 1320
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Pistons were in backwards.... you always have to make sure that the 2 little pins that hold your rings from spining are on the intake side, not the exhaust. If you put them on the exhaust side.. your ring end gap will be directly in the path of the exhaust port, then as soon as your engine comes up to temperature, the ring ends expand into the port and catch... ripping everything apart.
Better luck next time.
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