Help replacing piston rings
04-02-2009, 11:52 AM
#1
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Help replacing piston rings
Just recieved my service manual and read the process of rough milling,finishing, polishing then lapping the bores for going to a first oversize piston. But I just want to replace my rings, and my bores are fine. What to do. I read a post that suggested just to install the new rings and leave the cylinders alone. But not sure that would work.Thanks for any advice.
04-02-2009, 12:09 PM
#3
Team Owner
fit the rings correctly add some oil to the rings/ bores then fit them to the bore.
First check your ring end gaps by placing the rings into the bore then push them down the bore with the top of the piston then measure the gaps.
Nothing gets done to the bores unless they are damaged
First check your ring end gaps by placing the rings into the bore then push them down the bore with the top of the piston then measure the gaps.
Nothing gets done to the bores unless they are damaged
04-02-2009, 12:18 PM
#4
Administrator - "Tyson"
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04-02-2009, 01:35 PM
#6
Team Owner
yes, the vague post content does keep you wondering...........you can only answer based on what is asked.
The more info thats included the more info can be learned
The more info thats included the more info can be learned
04-02-2009, 01:47 PM
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True not enough details. I just picked up a 5 L short block and found most of the rings really stuck in the ring lands and could not remove some without breaking. They cleaned up very nicely so thats why I just want to replace the rings. The engine sat for a while on a crate before I got it. Thanks for the info.
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04-02-2009, 02:04 PM
#8
Team Owner
you can clean the pistons with simple green let em soak in the stuff it will loosen all of the carbon.
the use a tooth brush to clean the lands then wash in hot water, stay away from the piston skirts as they have a chromium plating that should look like a dull green/grey
the use a tooth brush to clean the lands then wash in hot water, stay away from the piston skirts as they have a chromium plating that should look like a dull green/grey
04-02-2009, 03:39 PM
#9
Nordschleife Master
What Stan just said needs to be repeated and expanded on.
Do not do anything other than what he is suggesting for cleaning the pistons besides maybe a ring groove cleaner. There is a special coating on the outside of the piston, if you remove that coating it will destroy the block and piston when run.
Do not do anything other than what he is suggesting for cleaning the pistons besides maybe a ring groove cleaner. There is a special coating on the outside of the piston, if you remove that coating it will destroy the block and piston when run.
04-02-2009, 07:07 PM
#11
Rennlist Member
I would drop them off with a shop to have rings installed if you havent done it before. cheap insurance. then on the install, use a good ring compressor and take your time. I used a mixture of oil and assembly lube from redline just on the skirts (very light assembly lube, almost like oil) and assembled.. Just gives you a few more cranks incase it doesnt start up the first few cranks, or you if you are doing a lot of dry cranks, like setting cam timing.
04-02-2009, 07:43 PM
#12
Team Owner
make sure to oil the bore and the rings/pistons prior to installing them if you dont you may damage the bores when you first start the engine
04-02-2009, 08:58 PM
#13
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you can clean the pistons with simple green let em soak in the stuff it will loosen all of the carbon.
the use a tooth brush to clean the lands then wash in hot water, stay away from the piston skirts as they have a chromium plating that should look like a dull green/grey
the use a tooth brush to clean the lands then wash in hot water, stay away from the piston skirts as they have a chromium plating that should look like a dull green/grey
(do not use scotch bright or any abrasives to clean the piston)
These were just cleaned by soaking and with a soft cloth.
04-02-2009, 09:08 PM
#15
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