Bad cylinder
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Freshman User
Joined: Jun 2016
Posts: 30
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Bad cylinder
Comp on all cyl is between 160 170 accept for one number 3 I believe. It's about 28. I've got blowby. possible the gaps on the Rings had lined up.
can I repair that one cylinder I would appreciate some insight thank you
can I repair that one cylinder I would appreciate some insight thank you
Methanoholic
Joined: Mar 2009
Posts: 6,442
Likes: 8
From: Maine (NorCal Native)
Who knows without looking ... It takes eyes on to make a determination like that, to many variables.
Many people have fixed just one cylinder ... And got away with it or not!
That low isn't aligned rings, it's bigger than that!
-Enjoy
fh : )_~
Many people have fixed just one cylinder ... And got away with it or not!
That low isn't aligned rings, it's bigger than that!
-Enjoy
fh : )_~
Junior User
Joined: Sep 2015
Posts: 97
Likes: 0
If it were myself, I would just tear it all down and rebuild. Yer already in there, May as well spend the extra dough. At least then you won't have to worry about the rest of them failing. Each to his own though. Seen it go both ways.
Methanoholic
Joined: Mar 2009
Posts: 6,442
Likes: 8
From: Maine (NorCal Native)
I'd be very surprised if it was fixable from the bottom ... Very surprised!
The top is coming off, how far is yet to be determined.
I personally wouldn't even waste my time pulling the pan, I'd head right for the bank that has low comp and start pulling the head inspecting things as I go and stopping when I find the issue!
Yea, if it's a hole in the piston or broke piston you'll see it from the bottom, possibly even broken rings by seeing wall damage.
Is it noisy, have you listened with a stethoscope (screwdriver to your ear).
Broken rings and pistons can be heard if you know what you are listening for, they double clack.
For All I know it could just be a bad valve, but your comment about blow by indicates poor piston seal, not valves.
-Enjoy
fh : )_~
The top is coming off, how far is yet to be determined.
I personally wouldn't even waste my time pulling the pan, I'd head right for the bank that has low comp and start pulling the head inspecting things as I go and stopping when I find the issue!
Yea, if it's a hole in the piston or broke piston you'll see it from the bottom, possibly even broken rings by seeing wall damage.
Is it noisy, have you listened with a stethoscope (screwdriver to your ear).
Broken rings and pistons can be heard if you know what you are listening for, they double clack.
For All I know it could just be a bad valve, but your comment about blow by indicates poor piston seal, not valves.
-Enjoy
fh : )_~
Mountain Pass
Joined: Apr 2015
Posts: 247
Likes: 0
From: Conroe,TX
I am thinking bad valve also have you done a leakdown test or like I do, my compression tool has a detachable gauge and allows me to hook my airhose up to it and I hook air up to the cylinders and listen to where the air is coming out.
Lead Driver
Joined: Jul 2007
Posts: 7,868
Likes: 9
From: Rhode Island
Won't be able to change a piston through the bottom. The head(s) have to come off to do that. I wouldn't even waste your time taking the oil pan off.
Start by doing a leak down test and seeing where all your air is going.
Start by doing a leak down test and seeing where all your air is going.
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