no me gusta anticongelante

[indy_500]

Use a chemical gasket stripper like "chisel" by permatex,spray into glass jar and use a small paint brush to apply to stuck gasket.Make a scraper out of a hardwood dowel,shape the end like a wedge,stuff a clean shop towel in the crankcase to keep debris out.scrape away from the open crank,vacuum all debris away prior to removing the shop towel.Under no circumstance use an abrasive.
The wear pattern on the exhaust suggest the cylinder is worn out of round allowing piston to contact cylinder wall.
Scrapes on piston suggest either carbon from the top or engine ingested something.
Amount of carbon present on piston top suggest poor jetting or bad choice in oils.
You seem to be a pretty industrious kid who wants to learn more about motors.A wealth of information that is fact can be had by researching the volumes of S.A.E. white papers.

So i should take them in and get them checked for roundness and have them honed?

 

[rp7x]

scraper

i use a razer blade , no nicks or gouges keep every thing clean , no debri in motor!

 

[fish633]

An out of round condition begins at first start up and continues throughout the life of the engine.Having it measured would be a good experience especially if you could watch it.With that said ,consult the factory manual to determine the procedure and tolerances to ensure the people taking the measurements do it correctly.From the pictures the scuffing is not that bad you might be surprised to find the cylinder well within spec.You may want to consider measuring the ring grooves for excessive wear as well if you plan not to replace pistons.
Honing will not make a cyl. "round" it will only follow the existing shape.

 

[trailshredder]

wouldn't it be kind of messy?

You have to be smart about it of course. Stuff some shop rags in the case around the rods.

To be honest with you we will typically split the crank case on all rebuilds (unless the customer is set dead against it) For the extra $30.00 in gaskets and small amount of labor it makes me feel better to know for sure all crank seals and bearings are good before reassembly.

All parts are cleaned in the parts washer and all crank bearings are oiled before put back togeather.

 

[jeff]

Indy, I would suggest that if your gonna buy new pistons to go with poo oem. I have the best luck with them verses others. cost is more but quality is everything. IMO

 

[snootbiscuit]

indy, are the cylinders chrome bore or sleeved. if there are oversized pistons avail. then its usually sleeved. you can hone both,BUT only hone chrome lightly w/ a ball hone. chance of a chrome bore being out of round are almost nill. if its sleeved, then you can hone. if they are out of round then you will want to use what is called a "fixed hone". this type will straighten cylinder then remeasure and see if w/in spec. if you use a spring loaded flex hone that will just follow the shape of existing cyl. and just make it bigger!

 

[indy_500]

Well i finished up a rebuild on an 01 doo 700 tonight successfully so that makes me feel better lol. I think I'll keep these pistons because the cylinders don't have a scratch. I really want to get a fusion for next year, so i'm going to be selling it, so I don't want to stick money that I don't have to into the thing. imo these pistons should last another 2k at a min. they dont look any worse than they did 1600 miles ago and hasnt lost a lb of comp.

 

[indy_500]

I have 3 choices. I found a wiseco set with no gaskets for $215. I found a Wiseco set with gaskets for $270 and they have it at kens sports so I can go there and just pick it up and end up returning my gaskets I got now. Or SPI for $120. The head o-rings aren't returnable since i got them a few months ago. The rest of the gaskets are worth $50 so i would get $50 back. So the difference between 215 and 270 is 55 so i would come out ahead getting the wisecos with no gaskets. But I could just do SPI for $120. If I get new pistons should I bother getting it honed since the cylinders look brand spanking new? I will get them checked for roundness.

 

[rp7x]

honner

if replacing rings you have to deglace the cylinders , you have to have the proper cross hatch for the rings to reseal . did you hone the ski doo ?

 

[indy_500]

if replacing rings you have to deglace the cylinders , you have to have the proper cross hatch for the rings to reseal . did you hone the ski doo ?

yes we got the doo honed for $10 at a doo shop, you think they should have no problem honing mine?

 

[trailshredder]

They can hone yours too.

 

[indy_500]

Getting these base gaskets off are a pain. I got it off the cylinders (took over an hour) i set a heater eyed up on the crank case hoping to heat up the gaskets on there so they come off easy.

 

[indy_500]

And the beast runs again! No new pistons, but she runs like a top. Hopefully my story wont change tomorrow