Go Back   Back Country Rebels - Forums > REBELS WITH A WRENCH > BRAND SPECIFIC TECH / DISCUSSION > SKI DOO

Reply
 
Thread Tools Display Modes
  #1  
Old 04-25-2012, 02:53 PM
2stroke4life's Avatar
2stroke4life 2stroke4life is offline
Member
 
Join Date: Nov 2009
Location: Wasilla , Alaska
Posts: 37
2stroke4life Has earned a rub and tug from AR2stroke4life Has earned a rub and tug from AR2stroke4life Has earned a rub and tug from AR2stroke4life Has earned a rub and tug from AR2stroke4life Has earned a rub and tug from AR2stroke4life Has earned a rub and tug from AR2stroke4life Has earned a rub and tug from AR2stroke4life Has earned a rub and tug from AR2stroke4life Has earned a rub and tug from AR2stroke4life Has earned a rub and tug from AR2stroke4life Has earned a rub and tug from AR2stroke4life Has earned a rub and tug from AR
Default 880 bmmp bleeding green again"HELP"

I need major help figuring out problem with BMP 880 . No matter what I do I can't keep head bolts from coming loose. I had crank replaced and then had it shipped out to Bikeman ( complete motor ) and they tore it down and built it, put on new domes and head for me . They said they check everything and there was nothing wrong , everthing was perfect?!! I took for two rides and same thing , the headbolts came loose sucked in antifreeze and burned up top end . Shipped it to them and they replaced it with new cylinders and piston . bolted it together and took for ride yesterday and same thing. Anyone in Alaska (Anchorage area) have one of these ??? I would like to know your secret to keeping this thing together! Or if anyone can help me get this motor to finally work i would have no problem paying for time. This has been going on since I bought this top end and I had this for three seasons.
Reply With Quote
  #2  
Old 04-25-2012, 04:06 PM
76FoMoCo's Avatar
76FoMoCo 76FoMoCo is offline
Captain Stick Head
 
Join Date: Nov 2009
Location: Nampa, Idaho
Posts: 5,636
76FoMoCo Offical PLP76FoMoCo Offical PLP76FoMoCo Offical PLP76FoMoCo Offical PLP
76FoMoCo Offical PLP76FoMoCo Offical PLP76FoMoCo Offical PLP76FoMoCo Offical PLP76FoMoCo Offical PLP76FoMoCo Offical PLP76FoMoCo Offical PLP76FoMoCo Offical PLP
Default

not a do guy but have seen some thing like this, does it have some timing issue? deto will do this kind of stuff so i would start with stock timing if you have anything advance to it or check the items doing the timing advance. the other is fuel low octane fuel will give the det also. on the cat and poo motors the tps and timing pickups, bad caps or broken plug wires along with a weak stator can do this.
Reply With Quote
  #3  
Old 04-25-2012, 05:34 PM
Mac-Daddy-Racing-212's Avatar
Mac-Daddy-Racing-212 Mac-Daddy-Racing-212 is offline
MOTORBOATER
 
Join Date: Jan 2010
Location: Cottage Grove, Minnesota
Posts: 5,458
Mac-Daddy-Racing-212 Offical PLPMac-Daddy-Racing-212 Offical PLPMac-Daddy-Racing-212 Offical PLPMac-Daddy-Racing-212 Offical PLP
Mac-Daddy-Racing-212 Offical PLPMac-Daddy-Racing-212 Offical PLPMac-Daddy-Racing-212 Offical PLPMac-Daddy-Racing-212 Offical PLPMac-Daddy-Racing-212 Offical PLPMac-Daddy-Racing-212 Offical PLPMac-Daddy-Racing-212 Offical PLPMac-Daddy-Racing-212 Offical PLP
Default

on the race motors we run for grass drags, we replaced the stock bolts with high tensile strength studs. This was use on a sled that had over 200psi of compression. It drank coolant like Kool-Aid before changing out the bolts. They would actually stretch and get loose.
__________________
"Lifes tough. It's even tougher if you're stupid"
John Wayne.

"THE TROUBLE WITH TROUBLE, IS THAT IT ALWAYS STARTS OUT AS FUN"


Rest in Peace: Steve Reis, Good Friend (1-17-14)

Rest in Peace: John Seipel, Father in Law (5-7-15)
Reply With Quote
  #4  
Old 04-26-2012, 02:55 AM
2stroke4life's Avatar
2stroke4life 2stroke4life is offline
Member
 
Join Date: Nov 2009
Location: Wasilla , Alaska
Posts: 37
2stroke4life Has earned a rub and tug from AR2stroke4life Has earned a rub and tug from AR2stroke4life Has earned a rub and tug from AR2stroke4life Has earned a rub and tug from AR2stroke4life Has earned a rub and tug from AR2stroke4life Has earned a rub and tug from AR2stroke4life Has earned a rub and tug from AR2stroke4life Has earned a rub and tug from AR2stroke4life Has earned a rub and tug from AR2stroke4life Has earned a rub and tug from AR2stroke4life Has earned a rub and tug from AR2stroke4life Has earned a rub and tug from AR
Default

new stator, running everything stock no advance timing . And running avgas 100 octane. Where do I start looking for high tensile headbolt or studs?
Reply With Quote
  #5  
Old 04-26-2012, 09:49 AM
Winter Brew's Avatar
Winter Brew Winter Brew is offline
REBEL
 
Join Date: Nov 2009
Location: Lake Tapps, Wa
Posts: 2,652
Winter Brew Offical PLPWinter Brew Offical PLPWinter Brew Offical PLPWinter Brew Offical PLP
Winter Brew Offical PLPWinter Brew Offical PLPWinter Brew Offical PLPWinter Brew Offical PLPWinter Brew Offical PLPWinter Brew Offical PLPWinter Brew Offical PLPWinter Brew Offical PLP
Default

Look closely at the domes. Look for small cracks on the inner lip of the o-ring valley. There is VERY little material there, have seen them crack which will allow coolant seep and the associated detonation....or worse.
Also look close at the top edge of the cylinder bore for any chips....a small chip here will allow coolant to pass.
Reply With Quote
  #6  
Old 04-26-2012, 11:41 AM
2stroke4life's Avatar
2stroke4life 2stroke4life is offline
Member
 
Join Date: Nov 2009
Location: Wasilla , Alaska
Posts: 37
2stroke4life Has earned a rub and tug from AR2stroke4life Has earned a rub and tug from AR2stroke4life Has earned a rub and tug from AR2stroke4life Has earned a rub and tug from AR2stroke4life Has earned a rub and tug from AR2stroke4life Has earned a rub and tug from AR2stroke4life Has earned a rub and tug from AR2stroke4life Has earned a rub and tug from AR2stroke4life Has earned a rub and tug from AR2stroke4life Has earned a rub and tug from AR2stroke4life Has earned a rub and tug from AR2stroke4life Has earned a rub and tug from AR
Default

the problem is not coolant leaking through but the heads getting so loose the domes hit the pistons.
Reply With Quote
  #7  
Old 04-26-2012, 12:30 PM
Winter Brew's Avatar
Winter Brew Winter Brew is offline
REBEL
 
Join Date: Nov 2009
Location: Lake Tapps, Wa
Posts: 2,652
Winter Brew Offical PLPWinter Brew Offical PLPWinter Brew Offical PLPWinter Brew Offical PLP
Winter Brew Offical PLPWinter Brew Offical PLPWinter Brew Offical PLPWinter Brew Offical PLPWinter Brew Offical PLPWinter Brew Offical PLPWinter Brew Offical PLPWinter Brew Offical PLP
Default

Yep....possibly from detonation if there are hairline cracks in the domes allowing small amounts of coolant in, which will cause detonation.....or, perhaps there is something else going on, but the one I recently had in the shop had the pistons hitting the edges of the domes....if they can touch the domes it is because the inner lip of the dome (by the o-ring) is distorted and likely cracked. Look real close at the o-ring groove....is it wider at any point?
Is there marks at the top of the piston from touching this part of the dome?
I don't know what starts the failure, but there is not much material around that o-ring to support the force of the head bolts....perhaps that thin ring of material is gradually collapsing inward which will allow both coolant consumption and head bolts to loosen??
Reply With Quote
  #8  
Old 06-04-2012, 02:07 PM
Teth-Air's Avatar
Teth-Air Teth-Air is offline
Just Got Here
 
Join Date: Jan 2011
Posts: 21
Teth-Air is an unknown quantity at this point
Default

My 08 Summit had the head bolts come loose when it detonated. At the time it had slp head and they sent me the wrong domes with too high of compression for my altitude. The small bolts that hold on the coolant fitting also backed out till it started leaking.
__________________
Developer of the "Cordless Teth-Air"
www.sourceinnovations.ca
Reply With Quote
  #9  
Old 06-06-2012, 09:27 AM
montanasledhead's Avatar
montanasledhead montanasledhead is offline
REBEL
 
Join Date: Nov 2009
Location: bitteroot valley
Posts: 1,462
montanasledhead Has earned a rub and tug from ARmontanasledhead Has earned a rub and tug from ARmontanasledhead Has earned a rub and tug from AR
montanasledhead Has earned a rub and tug from ARmontanasledhead Has earned a rub and tug from AR
Default

sound to me like Bikeman has an issue
I would think that as many big bore motors they build they would have used the correct studs.
what have they told you is going on
__________________
rebel 117
Reply With Quote
  #10  
Old 08-18-2012, 04:06 PM
maxwell maxwell is offline
Just Got Here
 
Join Date: Sep 2010
Posts: 1
maxwell is an unknown quantity at this point
Default

good read....my 880 ALSO does this. not all the time but once in a while i will pop the hood and green is oozing from the headbolts. ive been carying an 11mm wrench and tightening them every ride it seems..,...been running strong for 3 seasons never burnt up i guess im catching it in time....

stock head bolts bikeman never sent a different type. i also get an engine code once in a while...maybe it is a det issue.
Reply With Quote
Reply
Back Country Rebels - Forums > REBELS WITH A WRENCH > BRAND SPECIFIC TECH / DISCUSSION > SKI DOO

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -6. The time now is 02:32 AM.

 

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Managed by wDa @ WD ™

Designed by Military Ltd