2015 E-tec Crank and Primary Runout Limits?
- Thread starter vodoo103
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MK4TDI
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Hahah, I thought it was going to be much worse after all the backfiring it did at 7000 rpm for a couple of seasons. Still coming in at 140 psi on both sides too.
Going ride the bag off it this year, then decide what the next step is going to be....
pfi572
Active VIP Member
If it’s .020 run out ? It’s not going to last long . Lol
Have a tow rope , beer and a buddy .
Have a tow rope , beer and a buddy .
Hahah, I thought it was going to be much worse after all the backfiring it did at 7000 rpm for a couple of seasons. Still coming in at 140 psi on both sides too.
Going ride the bag off it this year, then decide what the next step is going to be....
If the rest of the sled is bagged like the crank then might as well let er buck. But if it's still a nice ride it would be much cheaper to fix it before the clutch breaks the end of the crank off.
https://www.youtube.com/watch?v=dq6T5BojXc8
MK4TDI
Active VIP Member
Well, those that know these gauges better than I do, is it .0020 or .020?
Every tic mark is 0.001 so it looks like you are more than 20 thou. BTW you don't need to zero it. Just mount it up so you are somewhere in the pins free travel and watch the sweep of the needle as you rotate. I like to put a sharpie mark, on the crank, at either the high or low point and watch to make sure it's always at the same point and same amount through several rotations. This prevents poor readings due to setup errors.
0.020 at the crank snout is a lot more out at the end of the clutch.
MK4TDI
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I used the indexing mark on the crank as a start and stop point, and if I remember correctly 180° from that point was the high side.
So with each tick being .001 or one thousandths of an inch, that would mean the crank runout would be .020 or 2 hundredths of an inch ?
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Stg2Suby
Active VIP Member
Each tick is 1 thousands of an inch, you are 20 thousands out in that photo. Two hundredths. Its a lot out nearly 10x over the specification, make sure the base is secured properly and you're not measuring play in the engine mounts.
I checked both of my 15' 800's
1800 km sled was 0.0031
2400 km sled was 0.0010
I hadn't seen the new limit of 0.0055 and got a little worried - just ran out of warranty last month
I found for accuracy i had to ratchet strap the mount to the cylinder head
sure wish i checked these when the sleds were new!
1800 km sled was 0.0031
2400 km sled was 0.0010
I hadn't seen the new limit of 0.0055 and got a little worried - just ran out of warranty last month
I found for accuracy i had to ratchet strap the mount to the cylinder head
sure wish i checked these when the sleds were new!
I check all my sleds when new and usually any time a clutch is off. My 17 Axys is the only one that was ever perfect. The Alpha is 0.0015.
0.020 is huge. We should have a pool on how long it will last. My bet is 400km
0.020 is huge. We should have a pool on how long it will last. My bet is 400km
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LBZ
Active VIP Member
.0055
Thanks. Missed a 0.
MK4TDI
Active VIP Member
Well I went back to the drawing board after reviewing the videos that were posted and chatted with a few mechanic friends of mine. I definitely misunderstood the BRP spec of .0024 thinking it was 24 thou, so thanks to those who corrected me on that.
With the sled laying on its side I was getting.. .024 of sweep, with it down on the skis getting around .022, gauge was checked for accuracy with a feeler gauge and is consistent.
https://youtu.be/b7L99EsW-RE
With the sled laying on its side I was getting.. .024 of sweep, with it down on the skis getting around .022, gauge was checked for accuracy with a feeler gauge and is consistent.
https://youtu.be/b7L99EsW-RE
Bnorth
Active VIP Member
What did you get turning it over with the recoil instead of the clutch bolt?
MK4TDI
Active VIP Member
I was getting .024 turning it with the clutch bolt while the sled was laying on its side, and I'm pretty sure I was getting .023 on its skis with the clutch bolt.
Had a Jman friend come over to turn it with the recoil and for a second set of eyes to make sure I was taking the reading right. He laughed when he seen how much the bolt head moved and said you dont need a dial indicator to see how far out that thing is.
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