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Reason for engine failure

Summit 800R engine piston failure

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#16 Daag44

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Posted 12 February 2021 - 10:39 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?


Never too late to test the valves. Those are the pieces where the smaller oil lines go to the case. MCB sends out new ones with their rebuild kits.

 

When you split the cases, the failed side had no oil pooling at the bottom?


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


#17 Daaabears85

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Posted 13 February 2021 - 05:57 AM

Never too late to test the valves. Those are the pieces where the smaller oil lines go to the case. MCB sends out new ones with their rebuild kits.

When you split the cases, the failed side had no oil pooling at the bottom?


I think I’ll call for a price for new ones if not expensive I’ll just replace them and be done with it and also both sides had a little oil at the bottom,

#18 Daag44

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Posted 13 February 2021 - 07:03 AM

I think I’ll call for a price for new ones if not expensive I’ll just replace them and be done with it and also both sides had a little oil at the bottom,

  
Having somewhat equal oil on both side, it becomes even more important to reconnect the oil pump and two small lines to see if there was any leaks. It is dry from no oil, but the reason needs to be found. Could this be too much snow/water ingestion? The engine can drink a fair amount of snow without much problem, but there is always a condition when it stops working. My guess is the engine wasn't getting enough oil injection. Since it is a 2008 800R that could very well be.
 
How much oil would it go for a 10 gal tank of gas? 1/4 tank or oil?


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


#19 Daaabears85

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Posted 13 February 2021 - 03:28 PM


Having somewhat equal oil on both side, it becomes even more important to reconnect the oil pump and two small lines to see if there was any leaks. It is dry from no oil, but the reason needs to be found. Could this be too much snow/water ingestion? The engine can drink a fair amount of snow without much problem, but there is always a condition when it stops working. My guess is the engine wasn't getting enough oil injection. Since it is a 2008 800R that could very well be.

How much oil would it go for a 10 gal tank of gas? 1/4 tank or oil?


I’m not sure I just bought this sled never actually rode it beside loading it in my trailer and into my garage, it still ran just had low compression so decided was gonna do a top end and now here I am lol. If I were to just get a new oil pump and replace check valves should I not be good?

#20 Daag44

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Posted 13 February 2021 - 06:10 PM

I don't do those types of repairs, so I don't know. I personally hate walking home or being towed, which I had my share of both.


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


#21 x-race

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Posted 14 February 2021 - 02:01 PM

Those pistons look very dry..

I would get a new oilpump, oil lines and check valves when you are doing this rebuild.







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