Diagnose my piston and head failure.

[Sunvang]

Anybody got a clue what happened to this? 2013 Assault with a Boondocker Turbo kit.

 

[Sunvang]

Sled was rode out about 2-3km, from the mountains after it happened, so alot of the damage is probably from that too.

 

[Flygti32]

Check your crank seal. I bet you it's blown out . Your sucking in air on it and leaned that side out and stuff started to go bad on you.

 

[jeepin270]

Jeez man... that blows!!!

 

[Flygti32]

Looks allot like this one. 13 pro 1300 miles.

 

[Boston Racing]

Detonation broke off a chunk of piston and then it tore everything else up. I have yet to see a mag side crank seal go.

That's what it looks like to me.

 

[clamlake600]

Hmmm...I know you rode it out but wouldn't det sensor catch that before it got to that point? Bad bearing, twisted crank, ring keeper pin still in piston? Seen those pop out from heat and cause a lot of damage..just plain sucks, I feel your pain.

 

[assault11]

Thats from detonation for sure. Seen the exact same thing before

 

[Bacon]

Deto and lean. There is no wash on the good piston.

 

[tinkerjohnson]

Piston

Detonation broke off a chunk of piston and then it tore everything else up. I have yet to see a mag side crank seal go.

That's what it looks like to me.

X2 detonation broke your piston and caused the carnage

 

[Timberview01]

a little off topic, but worth discussion

Would the det have been caused by bad gas? Have been hearing a lot of "stories" about non-ehtanol gas being contaminated lately. Suppliers blaming it on tanker trucks having hauled ethanol and then loading premium in the same tank without purging.

Here in north Idaho, some contamination of diesel has occurred, and the same culprit is being blamed.

Just curious.

I have been told to run 91 non-eth, but run the ethanol resistor just to be safe. Problem is, the performance sucks with the modified timing.

Anybody else have input?

 

[ak]

Boondocker turbo pump gas to much boost? Are you riding near sea level?

 

[2XM3]

detonation for sure....sad to see

 

[geo]

Deto and lean. There is no wash on the good piston.

One thing you have to remember about the piston wash pic is that cylinder did a bit of work, at light throttle i'm sure too, to haul the sled out.

Could of been a different pic right after failure.

 

[Sunvang]

Im thinking deto too. Wasnt lean according to the wideband gauge, had an a/f ratio from 11 to 12.