i am looking to buy a used sled. 2008 ski doo summit x xp 800r. owner has put a rebuilt short block engine in. is a rebuilt short block cheaper to put in then a rebuilt factory engine? what are the advantages/disadvantages of the short block? performance? reliability? for that year of sled, i heard they have a faulty crank, will a short block solve that problem? sounds to me like the guy blew up his sled and took the cheap alternative to fix it up then sell it. is it worth buying with this rebuilt shortblock engine?
rebuilt factory engine or rebuilt shortblock?
- Thread starter boyd155
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imdoo'n
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sounds like ya have a lot of newb questions. start checking some of the threads and posts on here.
who's short block is it?
who installed it?
what is the overall condition of sled? has it had the shheeet kicked out of it?
a factory rebuilt motor or one from a reputable shop should be to factory specs. should be good for another 3-4thous km's.
kinda sounds like your going to be on a fast(maybe costly) learning curve.
suggest ya do some thread searching.
who's short block is it?
who installed it?
what is the overall condition of sled? has it had the shheeet kicked out of it?
a factory rebuilt motor or one from a reputable shop should be to factory specs. should be good for another 3-4thous km's.
kinda sounds like your going to be on a fast(maybe costly) learning curve.
suggest ya do some thread searching.
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i belive it is a brp shortblock. was rebuilt at the dealer. the sled has many extras and seems to be in good. primary clutch has been rebuilt. secondary in good condition. fresh crank case service. previous engine had 5000km before rebuilt with a shortblock. from my understanding the shortblock when used to be rebuilt they use alot of the parts from the factory engine .
imdoo'n
Active VIP Member
generally the dealer does not rebuild shortblocks, they come from BRP already rebuilt. and use new parts as required to get back to new specs. how many km's on new motor? any paperwork, dealer installed motor? what is the compression, you can disconnect speedo and no mileage. fyi. ask a few more questions of seller.
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imdoo'n
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sounds like a good sled from the info you have given, short block from turps was 2300, 3000 is on the low side but may have been a deal? check on the back of primary clutch, you don't want it to be greasy.
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imdoo'n
Active VIP Member
crankseal lets go and flings grease out, usually takes out motor in a short order.
Yeah what he said ^^^ factory rebuilt is like getting a new engine, no worries there. If it was installed by the dealer then it carries a 1 yr warranty typically, so depending on when it was installed you still might have warranty remaining. This is a very common item for Ski Doo, the bottom end bearings are greased, once the grease breaks down the crank run out (wobble at the end of the crankshaft) increases and then the crank has to be replaced. Ski Doo makes a short block or a complete rebuilt motor, but the only difference is the short block does not come with a head, but the head doesn't wear out like rotating parts so usually you only have to buy a short block unless you have wrecked the head somehow.
The original parts like carbs, reeds, exhaust pipe, head etc are swapped to the new short block. These are the original parts that are "re-used" that you might be referring to. There is no issue with swapping these parts over and re-using them on the new shortblock (unless they are damaged or worn out). The reason the motor internals are replaced is because they are the "rotating assembly" in the motor, and these are the parts that will wear out over time from going around and around (crank) or up and down (pistons) a couple thousand times a minute. You said the sled had 5000 km before the rebuild, that is actually pretty good for a modern day two stroke and would not be out of line with what many others have experienced. I know lots of guys with Ski Doos who have replaced the motors with new shortblocks around the 3000 km mark. Keep in mind that the price of the sled should reflect some of the work done and the high mileage, at around 5000 kms, lots of other things like drive train bearings, suspension wheels and sliders, track (potentially depending on how hard the sled was ridden), skis, shocks, etc might need replacing so the price should be comparable or lower than similar sleds with less mileage, even with a new shortblock installed there are going to be other maintenance items that you will have to address on a sled with that much running time(even if the rest of the sled is in mint shape).
Hope that helps.
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if grease is getting out, then air can get in through the seal, and it will cause the engine to run lean and damage the motor too.........
If its crank seal is leaking after 400km - most likely installed incorrectly - you wouldnt think a new shortblock from BRP would be leaking already! Youd think it would be warranty! My thoughts would the dealership installed a crankshaft!
imdoo'n
Active VIP Member
your not following the post, it is something to look for before exchanging cash. if it's greasy, walk away from the sled,
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