Compression Question
- Thread starter sxrcohen5
- Start date
Soul Man
X
- Location
- Jacksonville, FL
Means you have a trashed cylinder. Hopefully it will just need new rings. You need to pull the head off and look inside. If the walls of the cylinder are nice and smooth, you may need to just hone it and put new rings on.
Odds are it is something more catestrophic and may need to be overbored and new pistons.
Odds are it is something more catestrophic and may need to be overbored and new pistons.
WaveDemon
Not Dead - Notable Member
- Location
- Hell, Florida
it needs a new top end and probably a rebore (possibly just a hone).
- Location
- Strathroy Ontario Canada
Wow, 70 psi in one cyl. :banghead:
How did it run?
How did it run?
Mile9c1
X-H2O.com
- Location
- Grand Rapids, MI
70 is pretty bad :banghead: That's gojng to need a bore, unless the piston is just broken.
so we took off the head and the cylinder with 140psi hows blackish carbon looking stuff on top of it and the one that had 70psi was more brown around the edges and alot dryier..it looks like the bad one is not getting any oil or something..They guy who looked at it before we took it apart said that it could have been the head gasket but looking at that it it seems fine..where do i go from here?
demolition_x
Not After Fame & Fortune
- Location
- Holden Beach / Wilmington NC
what do you have for carb / carbs. dual? or a single?
demolition_x
Not After Fame & Fortune
- Location
- Holden Beach / Wilmington NC
was the 70lb cylinder scored on the sides of the cylinder? or different from that of the other cylinder?
demolition_x
Not After Fame & Fortune
- Location
- Holden Beach / Wilmington NC
i think your gonna have to take some pics. typing a description and seeing it in a pic are 2 different things. im sure we could help you out better if you took some.
take pics of the cylinders, the head. the sparkplugs. this will give us an idea how it ran.
and was it running like this?
take pics of the cylinders, the head. the sparkplugs. this will give us an idea how it ran.
and was it running like this?
ok so i got some pics here is the link to the gallery
http://www.x-h2o.com/gallery/displayimage.php?album=lastup&cat=0&pos=0
The one that is more brown is the cylinder reading 70 psi and the one with the black on top is reading normal
there are 3 pics i think the link will work fine im new with doing this picture thing
http://www.x-h2o.com/gallery/displayimage.php?album=lastup&cat=0&pos=0
The one that is more brown is the cylinder reading 70 psi and the one with the black on top is reading normal
there are 3 pics i think the link will work fine im new with doing this picture thing
WaveDemon
Not Dead - Notable Member
- Location
- Hell, Florida
I'm guessing you have a stock head. if so, I think you have a blown head gasket and are getting water in the cyl. look for a missing or thin spot on your head gasket. replace the head gasket and recheck the compression.
Frosty
New York Crew
- Location
- Western New York
the "brown" one looks rusty... which I would think is what deman said... blown head gasket letting water into the cylinder...
WAB
salty nuts
- Location
- coastal GA
i agree with demon. What does the head gasket look like??
WaveDemon
Not Dead - Notable Member
- Location
- Hell, Florida
right, rust and clean piston mean water is getting in there. It looks like you got off easy. :biggthumpup:
WaveDemon
Not Dead - Notable Member
- Location
- Hell, Florida
it could be a blown O-ring too.
WAB
salty nuts
- Location
- coastal GA
Wow demon, you are on the ball today. Too fast for me to reply :smile: