ADVrider

Go Back   ADVrider > Riding > Day Trippin'
User Name
Password
Register Inmates Photos Site Rules Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
Old 04-15-2013, 08:27 PM   #826
bbjumper
Gnarly Adventurer
 
bbjumper's Avatar
 
Joined: Dec 2011
Location: Just the other side of normal
Oddometer: 184
From the look of that piston you did have a significant amount of blow-by and looking at the wrist pin the top end got hot at some time. How was the coolant level when you took her apart?
__________________
Speed doesn't kill, It's always the sudden stop that gets ya...

1982 Suzuki GS850G The "Zook"
2000 BMW R1100RT
bbjumper is online now   Reply With Quote
Old 04-15-2013, 09:47 PM   #827
Cubdriver
Stampede Swimmer
 
Cubdriver's Avatar
 
Joined: Aug 2007
Location: Palmer, Alaska
Oddometer: 672
Quote:
Originally Posted by bbjumper View Post
From the look of that piston you did have a significant amount of blow-by and looking at the wrist pin the top end got hot at some time. How was the coolant level when you took her apart?
Educate me. What about that piston looks abnormal and indicates blow-by?
__________________
09 R1200R, F800GS, HD Softail..... OOPS not on this site

For Mrs CD:F650GS, G650GS
Cubdriver is offline   Reply With Quote
Old 04-15-2013, 10:47 PM   #828
NomadGal OP
Esther
 
NomadGal's Avatar
 
Joined: Mar 2012
Location: Everywhere and Nowhere
Oddometer: 1,045
Quote:
Originally Posted by bbjumper View Post
From the look of that piston you did have a significant amount of blow-by and looking at the wrist pin the top end got hot at some time. How was the coolant level when you took her apart?
Coolant level was fine!
NomadGal is offline   Reply With Quote
Old 04-16-2013, 04:40 AM   #829
ben2go
Moto Flunky
 
ben2go's Avatar
 
Joined: Jun 2011
Location: Upstate SC USA
Oddometer: 3,160
Quote:
Originally Posted by Cubdriver View Post
Educate me. What about that piston looks abnormal and indicates blow-by?
More carbon on the piston crown than there should be,unless the engine was running really rich.
ben2go is offline   Reply With Quote
Old 04-16-2013, 06:23 AM   #830
Jettn Jim
This is Liv'n!!!
 
Jettn Jim's Avatar
 
Joined: Mar 2010
Location: NE PA Some... PNW Some... On HIGH ADVENTURE Most!
Oddometer: 1,696
Thumb

Late to the party.. glad ya got a hold of that washer Esther... I thought I had given you a flexi-magnet back at Waynes? Anyway good catch like DaFoole said!
Jettn Jim is offline   Reply With Quote
Old 04-16-2013, 06:50 AM   #831
bbjumper
Gnarly Adventurer
 
bbjumper's Avatar
 
Joined: Dec 2011
Location: Just the other side of normal
Oddometer: 184
Quote:
Originally Posted by Cubdriver View Post
Educate me. What about that piston looks abnormal and indicates blow-by?
If you look at it there is carbon build up below the first and second ring which makes me think that it's not sealing properly. The piston pin has the two dark bands, one on either side of the connecting rod, it's hard to tell by the photo but it looks blue, that would be from excessive heat.
__________________
Speed doesn't kill, It's always the sudden stop that gets ya...

1982 Suzuki GS850G The "Zook"
2000 BMW R1100RT
bbjumper is online now   Reply With Quote
Old 04-16-2013, 08:47 AM   #832
knybanjo
kinda slow
 
knybanjo's Avatar
 
Joined: May 2006
Location: out in the clover patch
Oddometer: 23,288
Quote:
Originally Posted by bbjumper View Post
If you look at it there is carbon build up below the first and second ring which makes me think that it's not sealing properly. The piston pin has the two dark bands, one on either side of the connecting rod, it's hard to tell by the photo but it looks blue, that would be from excessive heat.
Most likely caused by oil starvation?
__________________
knybanjo is offline   Reply With Quote
Old 04-16-2013, 09:02 AM   #833
bbjumper
Gnarly Adventurer
 
bbjumper's Avatar
 
Joined: Dec 2011
Location: Just the other side of normal
Oddometer: 184
Quote:
Originally Posted by knybanjo View Post
Most likely caused by oil starvation?
That or low coolant level, I would check for any metal in the oil filter too. With that checked and a new top end she should be good to go now.
__________________
Speed doesn't kill, It's always the sudden stop that gets ya...

1982 Suzuki GS850G The "Zook"
2000 BMW R1100RT
bbjumper is online now   Reply With Quote
Old 04-16-2013, 09:57 AM   #834
wymanwinn
n00b
 
Joined: Jun 2009
Oddometer: 5
Quote:
Originally Posted by bbjumper View Post
That or low coolant level, I would check for any metal in the oil filter too. With that checked and a new top end she should be good to go now.
her top end was good, here cylinder worn....second ring (i did not see them) were prolly toast as indicated by the heavy carbon build up on the backs of the intake valves....

wrist pin discoloration in the middle (where neither the pin or piston touch) in normal in an older motor....heat of combustion cooks splashed oil on the area discoloring it....

DreamRider's motor is nearly, if not very close, back together and back on the road....new 688 and fresh valve job...she is golden....

wish her well...

wyman
wymanwinn is offline   Reply With Quote
Old 04-16-2013, 11:44 AM   #835
knybanjo
kinda slow
 
knybanjo's Avatar
 
Joined: May 2006
Location: out in the clover patch
Oddometer: 23,288
Quote:
Originally Posted by wymanwinn View Post
her top end was good, here cylinder worn....second ring (i did not see them) were prolly toast as indicated by the heavy carbon build up on the backs of the intake valves....

wrist pin discoloration in the middle (where neither the pin or piston touch) in normal in an older motor....heat of combustion cooks splashed oil on the area discoloring it....

DreamRider's motor is nearly, if not very close, back together and back on the road....new 688 and fresh valve job...she is golden....

wish her well...

wyman
My fingers are crossed for a successful break in and waaaay beyond!
__________________
knybanjo is offline   Reply With Quote
Old 04-16-2013, 05:21 PM   #836
NomadGal OP
Esther
 
NomadGal's Avatar
 
Joined: Mar 2012
Location: Everywhere and Nowhere
Oddometer: 1,045
Quote:
Originally Posted by Jettn Jim View Post
I thought I had given you a flexi-magnet back at Waynes?
Nope
Maybe you wanted to but forgot?
NomadGal is offline   Reply With Quote
Old 04-16-2013, 05:24 PM   #837
NomadGal OP
Esther
 
NomadGal's Avatar
 
Joined: Mar 2012
Location: Everywhere and Nowhere
Oddometer: 1,045
Quote:
Originally Posted by wymanwinn View Post
DreamRider's motor is nearly, if not very close, back together and back on the road....new 688 and fresh valve job...she is golden....

wish her well...

wyman
Haha, they are now wondering who DreamRider is. It's the username I really wanted here on ADV, but it was already taken. So I ended up being NomadGal
NomadGal is offline   Reply With Quote
Old 04-16-2013, 05:29 PM   #838
NomadGal OP
Esther
 
NomadGal's Avatar
 
Joined: Mar 2012
Location: Everywhere and Nowhere
Oddometer: 1,045
She lives!!!
Spirit started right up, and ran smoothly.
I do still hear the cam chain, but I guess maybe she's just loud because she's older.
I had the rotor at T and lined up the cams. The only thing I can try and do again is take the cam chain tensioner back off and reinsert with rotor at T. I've have been having trouble with that tensioner for a while now. Got to invest in a new one as soon as I can afford it.
Today I had the engine run till she was warm, and other than one of the coolant hoses leaking now, she did great!!
Tomorrow will be my first ride with the 688. Can't wait to see what she'll feel like!
NomadGal is offline   Reply With Quote
Old 04-16-2013, 06:17 PM   #839
gunnerbuck
Island Hopper
 
gunnerbuck's Avatar
 
Joined: Nov 2005
Location: N.V.I, B.C.
Oddometer: 3,892
Oil Pump

Just wondering, have you inspected the internals of the oil pump through all this?
gunnerbuck is offline   Reply With Quote
Old 04-16-2013, 06:48 PM   #840
Jettn Jim
This is Liv'n!!!
 
Jettn Jim's Avatar
 
Joined: Mar 2010
Location: NE PA Some... PNW Some... On HIGH ADVENTURE Most!
Oddometer: 1,696
Thumb YeeeeeHaaaaaaaaaa.......

She's ALIVE!!!!
Jettn Jim is offline   Reply With Quote
Reply

Share

Thread Tools Search this Thread
Search this Thread:

.
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 On

Forum Jump


Times are GMT -7.   It's 04:23 PM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ADVrider 2011-2014