Reason for engine failure - REV-XP / XM Chassis - Mountain Sleds - DOOTalk Forums

Jump to content

 






Photo

Reason for engine failure

Summit 800R engine piston failure

  • Please log in to reply
20 replies to this topic

#1 Daaabears85

Daaabears85

    Newbie

  • Members
  • Pip
  • 8 posts
  • Sled:2008 summit Everest 800R

Posted 09 February 2021 - 08:54 PM

Bought a 2008 summit 800r with low compression for a good deal. Doing top end and would like to know what you guys think caused the piston to go. Checked out a few charts and can’t tell if it’s lack of lubrications or overheating. Would be nice to know to prevent new pistons and newly plated cylinders to go again. Previous owner didn’t mention anything about a fresh rebuild but the pistons don’t look all that old so wondering if something is going on

Attached Images

  • 90770FF2-949E-4A68-AD44-FF7D23835A66.jpeg
  • B7618971-28B0-456E-9C68-B8C61DFC4ECE.jpeg
  • 5C2F0BB9-0B7F-4FA4-A576-B03D0F2978BC.jpeg


#2 Ski-B

Ski-B

    Advanced Member

  • Members
  • PipPipPip
  • 5897 posts
  • Gender:Male
  • Location:Saskatchewan
  • Sled:2020 Freeride 850

Posted 10 February 2021 - 09:02 AM

At this point i would pull the crank out and have a really good look.

 

Check water pump drive gear.

 

Install new oil pump. as well as one way valves on cases.

 

Fresh seals.


2020 Freeride 850. My ride.

2018 XRS 850 Sons sled.

2017 Freeride 860R etec. 860BB. Daughters sled.

2015 Freeride 800R etec. All Stock. Wifes sled.

2015 BCX  800R etec. Trail ported. Spare sled.

2014 BCX 800R etec. All stock. Spare sled.

1998 Formula S 380. She is a keeper.


#3 Skandic Wide Track

Skandic Wide Track

    Advanced Member

  • Members
  • PipPipPip
  • 1063 posts
  • Gender:Male
  • Location:Durham, maine
  • Sled:1995 skandic wt

Posted 11 February 2021 - 12:46 AM

Looks dry. Lack of oil

#4 jbart90

jbart90

    Advanced Member

  • Members
  • PipPipPip
  • 39 posts
  • Gender:Male
  • Sled:2016 MXZ Blizzard 800R ETEC

Posted 11 February 2021 - 08:08 AM

It may not be helpful in determining the cause of failure, but the picture of the bottom side of the pistons looks like the pistons are not matching?   The top one in the image has extra features near the dome.

I'm not familiar with this engine, but can you tell if either piston is an OEM one and then relate that to which one is failed.  It may serve as a clue to what's been changed in the past



#5 Daag44

Daag44

    Advanced Member

  • Members
  • PipPipPip
  • 27748 posts
  • Gender:Male
  • Location:South Shore, Quebec
  • Interests:1973 Olympic
  • Sled:2007 1000 SDI

Posted 11 February 2021 - 12:18 PM

The the color/tint of the piston in the first picture has me question a complete loss of oil. I see one or maybe two of these each season, as most piston failures don't show this. It is the dark color, dryness and scoring that reaches all around the piston that gives it away. 
 
Now look at the bottom piston in the third picture. Note how the underside of the piston looks dark and dry compared to the upper piston. This has me question a number of things in the oil system. While disassembling the engine, keep the crankcase, crankshaft, oil pump and all small oil lines as a unit for testing. With this unit on a work bench, remove the oil pump still connected to the small oil lines, to turn it around and use an impact driver to turn the oil pump at high speeds. Look for any leaks in the oil check valves, tiny tube fitting on the valves, small oil lines that runs from the oil pump to the check valve, and the fitting from the pump to the tiny oil lines.
 
Do this right and you will know if it was a lack of oil. Skip a step or cheat for wiggling things around prior to the test, and you will have lost the most important portion of the diagnoses. Do not move or play with any of the hoses or fittings until the test has been completed.
 
The use of a cordless impact driver is to get the oil pump spinning fast enough. A regular drill does not turn fast enough and take forever to a drop of oil.

Edited by Daag44, 11 February 2021 - 12:23 PM.

Air/Fuel Ratio for two and four strokes
Air/Fuel Ratio for 1200 with boost
Air/Fuel Ratio is measured through emissions
Wideband and EGT
Wideband readings of Air/Fuel Ratio on a two stroke
600 SDI MY2004 Lean/Hot spot running 6900-7000 rpm @ 40-45% Throttle Opening
800R Cranking Compression
800R Oil Injection / Premix combo
800R P-TEK Electrical Troubleshooting #1 and #2 
800R Turbo
850 Center Oil line for coolant pump melted
850 Main Oil line caught fire #1 and #2
900 ACE Turbo - muffler turning red hot
1200 4-TEC Mapping
1200 4-TEC MY 2009 to 2011 Fuel Line issues that could cause a fire
Batteries
Belt Blowers: Overview of UPMICHIGANDER's and Ronn's experience
BUDS 3.3.0 won't connect to SDI
BUDS not connecting to HO or SDI - Try a CanDoo
Crankshaft runout - maximum allowable specs 
CVT efficiency - BlueMax
Deep snow intake for XP chassis
Electrical - ECM drivers for Ignition Coils and E-TEC injectors 
Electrical - Diagnoses of a failed ECM
Electrical - 30A Battery Charging Fuse Socket Diagnoses and Relay
Electrical - Relay Coil Wine
Electrical - Relay Testing
Electrical - Battery Charging Relay Diagnostic 
Electrical - Troubleshooting with BRP video 
Electrical - Solder vs Crimp
Electrical - Diagram for Fanners on page 3
Engine Break-In 
Engine Weight 
E-TEC 600HO Clutching
E-TEC Oil Pump
E-TEC Dial-A-Jet
E-TEC Electric Start troubleshooting
E-TEC Engine Management
E-TEC eRAVE position code recurring
E-TEC Stator fault codes P1562 or P1563
E-TEC Capacitor Charge Hold Test and Residual Voltage Test
E-TEC Voltage Rectifier Regulator troubleshooting
E-TEC Power Fades are not normal and can be fixed
Fuel Issues: Could new Ester type oxygenated additives be deteriorating the Fuel Sender Grommet?
Fuel pump and regulator replacement for ACE, E-TEC and SDI
Gasoline quality and storage
Bad Gas for a Two Stroke - Is it a Myth ?
GNR CVT Alignment for the G4
Grip N Rip Clutch Alignment testing
G4 Clutch Alignment, Engine Movement, Sheave Runout and Clutching
G4 850 Throttle Jerkiness solved with clutching
G4 850 Snappy throttle/clutch engagement
G4 850 pDrive tech - A question of Engineering
G4 Steering
G4 850 Tuned Pipe @ 12.6 lbs and Muffler @ 15.4 lbs vs 800R and 800RE muffler weight
Longevity - 800R E-TEC 
Mikuni o-ring for carb float assembly - Arctic Cat part# 6505-875 or from Amazon and eBay
Muffler Red Hot
Off-trail riding for flatlanders
Oil versus Fuel consumption
Pictures - How to resize and upload to DooTalk
Pictures - How to post with the correct orientation
Pipe Pressure testing on a dyno
Pipe Pressure testing from LRD (#1) and (#2)
Pipe Pressure testing results from BRP
Power Loss - How to diagnose in the field
Power at the Crankshaft vs Track - BlueMax
Power Curves: 600 HOE (E-TEC)
Power Curves: 600 vs 800 vs 850 vs 1000 vs 1200
Power Curves: 1000 vs 800 vs 600
Power curves: 800RE 2010.5 to 2016 vs 2016.5 850
Quebec/NY State border crossing
REV Gen1 Gauge Display stuck on "SCALE"
REV Gen1 Volt and Temp Gauge install
REV Gen1 electrical connectors for sensors and MPEM (Multi Purpose Engine Module)
Seafoam for E-TEC injectors
Shortblock or Rebuild?
Ski-Doo Snowmobile Tech Training
Spark Plugs cracked
Squish - The limit
Squish - A discussion on head design
Stator and Relay Diagnostic 
Stator testing for E-TEC using a T harness/Bridge
Stator testing for 1200 4-TEC
Stator Removal on page 3
Stator replacement for a 1200 4-TEC
Suspension Adjustment
Triples - Coolant Pump Assembly
Y-Pipe bolts loosening fix


#6 Winko

Winko

    Advanced Member

  • Members
  • PipPipPip
  • 837 posts
  • Gender:Male
  • Location:B.C.
  • Sled:2016 Summit X T3 174

Posted 11 February 2021 - 12:24 PM

The 07, 08 and I think possible some 09 800R's were some of the biggest POS ski-doo ever produced. Swap it for a new updated short block and call it a lessoned learned. 


Edited by Winko, 11 February 2021 - 12:26 PM.


#7 Daag44

Daag44

    Advanced Member

  • Members
  • PipPipPip
  • 27748 posts
  • Gender:Male
  • Location:South Shore, Quebec
  • Interests:1973 Olympic
  • Sled:2007 1000 SDI

Posted 11 February 2021 - 01:01 PM

Next thing to check is the oil pool at the bottom of the crankcase. If the failed side has little to no oil pooled, then it's a no brainer, but still test the oil system.

 

Make sure to empty all the coolant prior to disassembly. Siphon out what you can and disconnect the lower coolant hose at the pump, or just remove the coolant hose with a large catch pan. Leave no coolant flowing in the crankcase. It is the PITA portion of the teardown, but it needs to be done. Also, always - ALWAYS - mark each head, cylinder and crankcase bolt with a sharpie prior to removal. If there is a loose bolt, this is the only way you will ever know.


Edited by Daag44, 11 February 2021 - 01:06 PM.

Air/Fuel Ratio for two and four strokes
Air/Fuel Ratio for 1200 with boost
Air/Fuel Ratio is measured through emissions
Wideband and EGT
Wideband readings of Air/Fuel Ratio on a two stroke
600 SDI MY2004 Lean/Hot spot running 6900-7000 rpm @ 40-45% Throttle Opening
800R Cranking Compression
800R Oil Injection / Premix combo
800R P-TEK Electrical Troubleshooting #1 and #2 
800R Turbo
850 Center Oil line for coolant pump melted
850 Main Oil line caught fire #1 and #2
900 ACE Turbo - muffler turning red hot
1200 4-TEC Mapping
1200 4-TEC MY 2009 to 2011 Fuel Line issues that could cause a fire
Batteries
Belt Blowers: Overview of UPMICHIGANDER's and Ronn's experience
BUDS 3.3.0 won't connect to SDI
BUDS not connecting to HO or SDI - Try a CanDoo
Crankshaft runout - maximum allowable specs 
CVT efficiency - BlueMax
Deep snow intake for XP chassis
Electrical - ECM drivers for Ignition Coils and E-TEC injectors 
Electrical - Diagnoses of a failed ECM
Electrical - 30A Battery Charging Fuse Socket Diagnoses and Relay
Electrical - Relay Coil Wine
Electrical - Relay Testing
Electrical - Battery Charging Relay Diagnostic 
Electrical - Troubleshooting with BRP video 
Electrical - Solder vs Crimp
Electrical - Diagram for Fanners on page 3
Engine Break-In 
Engine Weight 
E-TEC 600HO Clutching
E-TEC Oil Pump
E-TEC Dial-A-Jet
E-TEC Electric Start troubleshooting
E-TEC Engine Management
E-TEC eRAVE position code recurring
E-TEC Stator fault codes P1562 or P1563
E-TEC Capacitor Charge Hold Test and Residual Voltage Test
E-TEC Voltage Rectifier Regulator troubleshooting
E-TEC Power Fades are not normal and can be fixed
Fuel Issues: Could new Ester type oxygenated additives be deteriorating the Fuel Sender Grommet?
Fuel pump and regulator replacement for ACE, E-TEC and SDI
Gasoline quality and storage
Bad Gas for a Two Stroke - Is it a Myth ?
GNR CVT Alignment for the G4
Grip N Rip Clutch Alignment testing
G4 Clutch Alignment, Engine Movement, Sheave Runout and Clutching
G4 850 Throttle Jerkiness solved with clutching
G4 850 Snappy throttle/clutch engagement
G4 850 pDrive tech - A question of Engineering
G4 Steering
G4 850 Tuned Pipe @ 12.6 lbs and Muffler @ 15.4 lbs vs 800R and 800RE muffler weight
Longevity - 800R E-TEC 
Mikuni o-ring for carb float assembly - Arctic Cat part# 6505-875 or from Amazon and eBay
Muffler Red Hot
Off-trail riding for flatlanders
Oil versus Fuel consumption
Pictures - How to resize and upload to DooTalk
Pictures - How to post with the correct orientation
Pipe Pressure testing on a dyno
Pipe Pressure testing from LRD (#1) and (#2)
Pipe Pressure testing results from BRP
Power Loss - How to diagnose in the field
Power at the Crankshaft vs Track - BlueMax
Power Curves: 600 HOE (E-TEC)
Power Curves: 600 vs 800 vs 850 vs 1000 vs 1200
Power Curves: 1000 vs 800 vs 600
Power curves: 800RE 2010.5 to 2016 vs 2016.5 850
Quebec/NY State border crossing
REV Gen1 Gauge Display stuck on "SCALE"
REV Gen1 Volt and Temp Gauge install
REV Gen1 electrical connectors for sensors and MPEM (Multi Purpose Engine Module)
Seafoam for E-TEC injectors
Shortblock or Rebuild?
Ski-Doo Snowmobile Tech Training
Spark Plugs cracked
Squish - The limit
Squish - A discussion on head design
Stator and Relay Diagnostic 
Stator testing for E-TEC using a T harness/Bridge
Stator testing for 1200 4-TEC
Stator Removal on page 3
Stator replacement for a 1200 4-TEC
Suspension Adjustment
Triples - Coolant Pump Assembly
Y-Pipe bolts loosening fix


#8 Daag44

Daag44

    Advanced Member

  • Members
  • PipPipPip
  • 27748 posts
  • Gender:Male
  • Location:South Shore, Quebec
  • Interests:1973 Olympic
  • Sled:2007 1000 SDI

Posted 11 February 2021 - 01:13 PM

It may not be helpful in determining the cause of failure, but the picture of the bottom side of the pistons looks like the pistons are not matching?   The top one in the image has extra features near the dome.

I'm not familiar with this engine, but can you tell if either piston is an OEM one and then relate that to which one is failed.  It may serve as a clue to what's been changed in the past

 
The top one is a forged piston from Kelsey @ RK Tek.


Air/Fuel Ratio for two and four strokes
Air/Fuel Ratio for 1200 with boost
Air/Fuel Ratio is measured through emissions
Wideband and EGT
Wideband readings of Air/Fuel Ratio on a two stroke
600 SDI MY2004 Lean/Hot spot running 6900-7000 rpm @ 40-45% Throttle Opening
800R Cranking Compression
800R Oil Injection / Premix combo
800R P-TEK Electrical Troubleshooting #1 and #2 
800R Turbo
850 Center Oil line for coolant pump melted
850 Main Oil line caught fire #1 and #2
900 ACE Turbo - muffler turning red hot
1200 4-TEC Mapping
1200 4-TEC MY 2009 to 2011 Fuel Line issues that could cause a fire
Batteries
Belt Blowers: Overview of UPMICHIGANDER's and Ronn's experience
BUDS 3.3.0 won't connect to SDI
BUDS not connecting to HO or SDI - Try a CanDoo
Crankshaft runout - maximum allowable specs 
CVT efficiency - BlueMax
Deep snow intake for XP chassis
Electrical - ECM drivers for Ignition Coils and E-TEC injectors 
Electrical - Diagnoses of a failed ECM
Electrical - 30A Battery Charging Fuse Socket Diagnoses and Relay
Electrical - Relay Coil Wine
Electrical - Relay Testing
Electrical - Battery Charging Relay Diagnostic 
Electrical - Troubleshooting with BRP video 
Electrical - Solder vs Crimp
Electrical - Diagram for Fanners on page 3
Engine Break-In 
Engine Weight 
E-TEC 600HO Clutching
E-TEC Oil Pump
E-TEC Dial-A-Jet
E-TEC Electric Start troubleshooting
E-TEC Engine Management
E-TEC eRAVE position code recurring
E-TEC Stator fault codes P1562 or P1563
E-TEC Capacitor Charge Hold Test and Residual Voltage Test
E-TEC Voltage Rectifier Regulator troubleshooting
E-TEC Power Fades are not normal and can be fixed
Fuel Issues: Could new Ester type oxygenated additives be deteriorating the Fuel Sender Grommet?
Fuel pump and regulator replacement for ACE, E-TEC and SDI
Gasoline quality and storage
Bad Gas for a Two Stroke - Is it a Myth ?
GNR CVT Alignment for the G4
Grip N Rip Clutch Alignment testing
G4 Clutch Alignment, Engine Movement, Sheave Runout and Clutching
G4 850 Throttle Jerkiness solved with clutching
G4 850 Snappy throttle/clutch engagement
G4 850 pDrive tech - A question of Engineering
G4 Steering
G4 850 Tuned Pipe @ 12.6 lbs and Muffler @ 15.4 lbs vs 800R and 800RE muffler weight
Longevity - 800R E-TEC 
Mikuni o-ring for carb float assembly - Arctic Cat part# 6505-875 or from Amazon and eBay
Muffler Red Hot
Off-trail riding for flatlanders
Oil versus Fuel consumption
Pictures - How to resize and upload to DooTalk
Pictures - How to post with the correct orientation
Pipe Pressure testing on a dyno
Pipe Pressure testing from LRD (#1) and (#2)
Pipe Pressure testing results from BRP
Power Loss - How to diagnose in the field
Power at the Crankshaft vs Track - BlueMax
Power Curves: 600 HOE (E-TEC)
Power Curves: 600 vs 800 vs 850 vs 1000 vs 1200
Power Curves: 1000 vs 800 vs 600
Power curves: 800RE 2010.5 to 2016 vs 2016.5 850
Quebec/NY State border crossing
REV Gen1 Gauge Display stuck on "SCALE"
REV Gen1 Volt and Temp Gauge install
REV Gen1 electrical connectors for sensors and MPEM (Multi Purpose Engine Module)
Seafoam for E-TEC injectors
Shortblock or Rebuild?
Ski-Doo Snowmobile Tech Training
Spark Plugs cracked
Squish - The limit
Squish - A discussion on head design
Stator and Relay Diagnostic 
Stator testing for E-TEC using a T harness/Bridge
Stator testing for 1200 4-TEC
Stator Removal on page 3
Stator replacement for a 1200 4-TEC
Suspension Adjustment
Triples - Coolant Pump Assembly
Y-Pipe bolts loosening fix


#9 Daaabears85

Daaabears85

    Newbie

  • Members
  • Pip
  • 8 posts
  • Sled:2008 summit Everest 800R

Posted 11 February 2021 - 03:27 PM

Thanks for the input, some helpful information

#10 Daag44

Daag44

    Advanced Member

  • Members
  • PipPipPip
  • 27748 posts
  • Gender:Male
  • Location:South Shore, Quebec
  • Interests:1973 Olympic
  • Sled:2007 1000 SDI

Posted 11 February 2021 - 03:52 PM

Thanks for the input, some helpful information

 
I can only hope that you pay it back with more pictures and results from you testing. No one does it alone.


Air/Fuel Ratio for two and four strokes
Air/Fuel Ratio for 1200 with boost
Air/Fuel Ratio is measured through emissions
Wideband and EGT
Wideband readings of Air/Fuel Ratio on a two stroke
600 SDI MY2004 Lean/Hot spot running 6900-7000 rpm @ 40-45% Throttle Opening
800R Cranking Compression
800R Oil Injection / Premix combo
800R P-TEK Electrical Troubleshooting #1 and #2 
800R Turbo
850 Center Oil line for coolant pump melted
850 Main Oil line caught fire #1 and #2
900 ACE Turbo - muffler turning red hot
1200 4-TEC Mapping
1200 4-TEC MY 2009 to 2011 Fuel Line issues that could cause a fire
Batteries
Belt Blowers: Overview of UPMICHIGANDER's and Ronn's experience
BUDS 3.3.0 won't connect to SDI
BUDS not connecting to HO or SDI - Try a CanDoo
Crankshaft runout - maximum allowable specs 
CVT efficiency - BlueMax
Deep snow intake for XP chassis
Electrical - ECM drivers for Ignition Coils and E-TEC injectors 
Electrical - Diagnoses of a failed ECM
Electrical - 30A Battery Charging Fuse Socket Diagnoses and Relay
Electrical - Relay Coil Wine
Electrical - Relay Testing
Electrical - Battery Charging Relay Diagnostic 
Electrical - Troubleshooting with BRP video 
Electrical - Solder vs Crimp
Electrical - Diagram for Fanners on page 3
Engine Break-In 
Engine Weight 
E-TEC 600HO Clutching
E-TEC Oil Pump
E-TEC Dial-A-Jet
E-TEC Electric Start troubleshooting
E-TEC Engine Management
E-TEC eRAVE position code recurring
E-TEC Stator fault codes P1562 or P1563
E-TEC Capacitor Charge Hold Test and Residual Voltage Test
E-TEC Voltage Rectifier Regulator troubleshooting
E-TEC Power Fades are not normal and can be fixed
Fuel Issues: Could new Ester type oxygenated additives be deteriorating the Fuel Sender Grommet?
Fuel pump and regulator replacement for ACE, E-TEC and SDI
Gasoline quality and storage
Bad Gas for a Two Stroke - Is it a Myth ?
GNR CVT Alignment for the G4
Grip N Rip Clutch Alignment testing
G4 Clutch Alignment, Engine Movement, Sheave Runout and Clutching
G4 850 Throttle Jerkiness solved with clutching
G4 850 Snappy throttle/clutch engagement
G4 850 pDrive tech - A question of Engineering
G4 Steering
G4 850 Tuned Pipe @ 12.6 lbs and Muffler @ 15.4 lbs vs 800R and 800RE muffler weight
Longevity - 800R E-TEC 
Mikuni o-ring for carb float assembly - Arctic Cat part# 6505-875 or from Amazon and eBay
Muffler Red Hot
Off-trail riding for flatlanders
Oil versus Fuel consumption
Pictures - How to resize and upload to DooTalk
Pictures - How to post with the correct orientation
Pipe Pressure testing on a dyno
Pipe Pressure testing from LRD (#1) and (#2)
Pipe Pressure testing results from BRP
Power Loss - How to diagnose in the field
Power at the Crankshaft vs Track - BlueMax
Power Curves: 600 HOE (E-TEC)
Power Curves: 600 vs 800 vs 850 vs 1000 vs 1200
Power Curves: 1000 vs 800 vs 600
Power curves: 800RE 2010.5 to 2016 vs 2016.5 850
Quebec/NY State border crossing
REV Gen1 Gauge Display stuck on "SCALE"
REV Gen1 Volt and Temp Gauge install
REV Gen1 electrical connectors for sensors and MPEM (Multi Purpose Engine Module)
Seafoam for E-TEC injectors
Shortblock or Rebuild?
Ski-Doo Snowmobile Tech Training
Spark Plugs cracked
Squish - The limit
Squish - A discussion on head design
Stator and Relay Diagnostic 
Stator testing for E-TEC using a T harness/Bridge
Stator testing for 1200 4-TEC
Stator Removal on page 3
Stator replacement for a 1200 4-TEC
Suspension Adjustment
Triples - Coolant Pump Assembly
Y-Pipe bolts loosening fix


#11 Ski-B

Ski-B

    Advanced Member

  • Members
  • PipPipPip
  • 5897 posts
  • Gender:Male
  • Location:Saskatchewan
  • Sled:2020 Freeride 850

Posted 11 February 2021 - 06:22 PM

Check the bore size on the pistons or cylinder. Should be around 82mm. You might have a big bore cylinder on that rig. The big bore cylinder or pistons measure around 85mm. 


2020 Freeride 850. My ride.

2018 XRS 850 Sons sled.

2017 Freeride 860R etec. 860BB. Daughters sled.

2015 Freeride 800R etec. All Stock. Wifes sled.

2015 BCX  800R etec. Trail ported. Spare sled.

2014 BCX 800R etec. All stock. Spare sled.

1998 Formula S 380. She is a keeper.


#12 MCB Performance

MCB Performance

    Advanced Member

  • Sponsors
  • 514 posts
  • Gender:Male
  • Location:Michigan
  • Sled:Varies with the wind.....

Posted 12 February 2021 - 08:30 AM

Are those pistons from the same engine !? They are VERY different designs (other than both being forgings).

 

The top is an Italian forging (78-26) and the bottom is also but using the Lt wt die (2115). 

 

WIll need more pics to help here but as one poster has already pointed out...very dry.

 

- Scott @ MCB


SOLD HERE:

 

 

- MCB Engine Rebuild kits (stage 1-4)
- MCB Dual Ring Piston kits Most ALL Engines
- WOSSNER, Elko, Pistons (all)
- Cylinder Exchange (all makes and models)
- Remanufactured Crankshafts MCB
- MAXIMA Lubricants
- Boyesen
- V-force
- MBRP
- Straight Line

MCB Performance
810-395-7162
862-200-SLED(7533)

14500 Foley Rd
Capac, Mi 48014

Order Anytime Online...24 hrs a day!!
www.mcbperformance.com)


#13 Daaabears85

Daaabears85

    Newbie

  • Members
  • Pip
  • 8 posts
  • Sled:2008 summit Everest 800R

Posted 12 February 2021 - 06:59 PM

Both pistons are definitely different but stock size. Couldn’t really test the oil pump as I had already pretty much stripped everything but I think I’m just gonna get a new one. Also decided to split the case and check out the crank in case it did run dry and found my Center bearings shot, going to call cvtech I think and get a reman on Monday. Only other thing I’m having an issue with is the oil check valves not sure where these are? Small piece where the smaller oil lines go to the case?

#14 Ski-B

Ski-B

    Advanced Member

  • Members
  • PipPipPip
  • 5897 posts
  • Gender:Male
  • Location:Saskatchewan
  • Sled:2020 Freeride 850

Posted 12 February 2021 - 08:18 PM

Yes that is them. If you go with a new short block? It will come with new check valves installed. 


2020 Freeride 850. My ride.

2018 XRS 850 Sons sled.

2017 Freeride 860R etec. 860BB. Daughters sled.

2015 Freeride 800R etec. All Stock. Wifes sled.

2015 BCX  800R etec. Trail ported. Spare sled.

2014 BCX 800R etec. All stock. Spare sled.

1998 Formula S 380. She is a keeper.


#15 Daaabears85

Daaabears85

    Newbie

  • Members
  • Pip
  • 8 posts
  • Sled:2008 summit Everest 800R

Posted 12 February 2021 - 09:19 PM

Yes that is them. If you go with a new short block? It will come with new check valves installed.


Short block probably would of been the way to go but a little too late for that, everything is already paid for and cylinders re plated. So rebuild it is, thanks though I’ll look into those checks





0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users