piston when boom

[polcat1p]

i bought this polaris scrambler 400 4x4 a week ago. the guy said the crank seized, well i took the engen out and cylinder off and the skirt let go. there is metal chips everywhere. do you think my botttom end is still good???

[polcat1p]

2

[polcat1p]

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[polcat1p]

4
cylinder doesnt look to bad

[polcat1p]

5

[polcat1p]

6
please keep the polaris scramber bashing to a min. im a honda guy that just couldnt pass up the deal. hope it doesnt bite me.

[hrc450er]

thats alot of metal. i wouldnt want to put it back together til i knew i got all of that metal out. so for me that would mean splitting the cases. it would be hard to get all that metal out of the bottom end without doing it.

[Scro]

Originally posted by hrc450er
thats alot of metal. i wouldnt want to put it back together til i knew i got all of that metal out. so for me that would mean splitting the cases. it would be hard to get all that metal out of the bottom end without doing it.

x2. I would split the cases.

[polcat1p]

i did split the cases. im wondering if i should replace the bearings? everthing looks good, but im no machine shop.

[polcat1p]

b

[polcat1p]

is it ok if my rod move back and forth a little?

[brian 68]

a little side to side is ok but no up and down. if you spin the bearings and they catch or drag at all replace them . and if you got the $ just replace them anyway. have the cylinder checked .

[honda400ex2003]

a bit late but awesome carnage there. sorry for your loss. sad to see any engine with metal like that in it. steve

[polcat1p]

how do you get the rod off the crank? i have up and down, side to side movement.

[GPracer2500]

Originally posted by polcat1p
how do you get the rod off the crank? i have up and down, side to side movement.

The crank is pressed together. If the big end bearing is bad you pretty much need a machine shop to handle rebuilding the crank.

Crank work can be expensive. Get an estimate on rebuilding your existing crank and then look around for serviceable used cranks. Then weigh the risk/benefit and make a choice. A used crank may have unknown life left in it. But if you're just trying to get it running, a used crank from a running engine might be a good call.

$0.02

[hrc450er]

for the money of rebuilding a crank you might be better off buying a new one and you dont take the risk of someone not getting it right

[bryan.young1]

damn sorry to hear your scrambler blew up man. Free bump hope you get it fixed up.

[jbmatt]

I have the same problem on the rod bearings on a Scam400 I just bought. I can get the whole crank assembly from my local dealer for $250. Thats the route I'm going.