Possible cause for bad rings.....hmmmm
Thread Starter
Race Director
Joined: Mar 2000
Posts: 17,602
Likes: 20
From: Palm City Florida
Possible cause for bad rings.....hmmmm
My C5 mechanic told my he just replaced the rings on a 2001 Z06. He said he thinks the problem is that they use chrome Alloy rings and that they need to be seated properly. His theory is that some folks don't drive the car hard enough in the beginning to seat the rings. Accoding to him these hard rings must be hammered pretty good to seat.
I have regularly driven to redline since my car hit the 1st 500 miles. No abnormal consumption here.
Does this theory hold weight???
I have regularly driven to redline since my car hit the 1st 500 miles. No abnormal consumption here.
Does this theory hold weight???
Drifting
Joined: Oct 2001
Posts: 1,366
Likes: 0
From: America
Re: Possible cause for bad rings.....hmmmm (chuckster)
Chuk, IT used to........still may, from the GM tech bulletin, the # 2 ring is a 9# pressure ring, and at certain RPM's it is "Fluttering", , I take that to mean it's not got enough tensile expansion to keep it in contact with the cylinder walls........
For this reason they went to a ring with 13#'s tensile pressure for the fix, and a different design on the lip........a napier design.....whatever that is.......
Bottom line, the rings do not have enough OUTWARD pressure to keep a proper seal on the piston to cylinder wall ................So, oil is allowed past them, and viola!!!!!!!!!........out the exhaust she goes.
Or, so was the tale from the GM fairies.................. :cry
For this reason they went to a ring with 13#'s tensile pressure for the fix, and a different design on the lip........a napier design.....whatever that is.......
Bottom line, the rings do not have enough OUTWARD pressure to keep a proper seal on the piston to cylinder wall ................So, oil is allowed past them, and viola!!!!!!!!!........out the exhaust she goes.
Or, so was the tale from the GM fairies.................. :cry
Le Mans Master
Joined: Feb 2001
Posts: 5,379
Likes: 86
From: Houston TX
Re: Possible cause for bad rings.....hmmmm (chuckster)
Yeah... and only with 6spd C5's!!! So says a Chevy Shop Foreman at one dealership! :rolleyes:
When Auto's have had the same problem too.... I don't have a problem but it burned enough oil during the break in period that I got kinda scared.
When Auto's have had the same problem too.... I don't have a problem but it burned enough oil during the break in period that I got kinda scared.
Safety Car
Joined: Sep 2001
Posts: 4,411
Likes: 1
From: Wilmington NC
Re: Possible cause for bad rings.....hmmmm (ZO6LS6)
For this reason they went to a ring with 13#'s tensile pressure for the fix, and a different design on the lip........a napier design.....
Le Mans Master
Joined: Mar 1999
Posts: 6,744
Likes: 1
From: delmont pa
Cruise-In I Veteran
Cruise-In II Veteran
Re: Possible cause for bad rings.....hmmmm (chuckster)
go to http://www.idavette.net/hib/02ls6/page5.htm for the full story on the rings. :chevy
