Welcome to the North American Subaru Impreza Owners Club Friday March 29, 2024
Home Forums Images WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC General > General Community

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.







* As an Amazon Associate I earn from qualifying purchases. 
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 06-01-2005, 03:02 PM   #1
BlackoutWRX
Scooby Specialist
 
Member#: 74589
Join Date: Nov 2004
Chapter/Region: MAIC
Location: Richmond, VA
Vehicle:
2000 94 Infiniti G20
90 S13 Coupe

Default Question About Cylinder Walls.

i understand that when a car is new that the cylinder walls are scored slightly on the final hone so that the piston rings can seal properly, but after all of that is done, and say a car has 50k miles on it, are the cylinders completely smooth, or are there still "scratches" there to help retain oil for lubrication purposes?
* Registered users of the site do not see these ads.
BlackoutWRX is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 06-01-2005, 04:17 PM   #2
Hayes
Scooby Specialist
 
Member#: 11808
Join Date: Oct 2001
Location: Cape Coral,FL
Default

yes the "HONE" marks are still there but, the sharp edges are now rounded. I've see blocks with 125,000 miles on them and there were still hone marks. How long they last is a function of how well the car was maintained, driven, oil used and of course quarily of materials. ed
Hayes is offline   Reply With Quote
Old 06-01-2005, 04:30 PM   #3
BlackoutWRX
Scooby Specialist
 
Member#: 74589
Join Date: Nov 2004
Chapter/Region: MAIC
Location: Richmond, VA
Vehicle:
2000 94 Infiniti G20
90 S13 Coupe

Default

Quote:
Originally Posted by Hayes
yes the "HONE" marks are still there but, the sharp edges are now rounded. I've see blocks with 125,000 miles on them and there were still hone marks. How long they last is a function of how well the car was maintained, driven, oil used and of course quarily of materials. ed
so from the factory, are the hone marks vertical or horizonal on the cylinders?

i was under the impression that after the initial few thousand miles that the walls were completley smooth.
BlackoutWRX is offline   Reply With Quote
Old 06-01-2005, 06:16 PM   #4
gpatmac
Scooby Guru
 
Member#: 18446
Join Date: May 2002
Chapter/Region: MAIC
Location: Stratford, CT
Vehicle:
2002 WRX wagon
psm

Default

gpatmac is offline   Reply With Quote
Old 06-01-2005, 07:17 PM   #5
Uncle Scotty
*** Banned ***
 
Member#: 16200
Join Date: Mar 2002
Vehicle:
OK buy Nates beans
westcoastroasting.com

Default

....if the cyl walls were completely smooth, they wouldn't hold any oil and that is NOT what ya want....
Uncle Scotty is offline   Reply With Quote
Old 06-01-2005, 08:40 PM   #6
Hayes
Scooby Specialist
 
Member#: 11808
Join Date: Oct 2001
Location: Cape Coral,FL
Default

Honing marks are in a cross hatch pattern at approximately 45 degrees. ed
Hayes is offline   Reply With Quote
Old 06-01-2005, 11:26 PM   #7
Hondaslayer
Scooby Guru
 
Member#: 4562
Join Date: Feb 2001
Chapter/Region: NWIC
Location: Auburn, WA
Vehicle:
2014 Electric Datsun
2005 Adventure van

Default

Cross hatches on Suby engines are amazing.

I tore down an engine with well over 400k on it (actual mileage was unknown it had 200k when the body went to ****, went another 100k in another car, another 100k in another car and was still going strong when I bought said car) Anyhoo the thing looked new on the inside. EJ22 from a 1990 Legacy. My Domestic tech kept babbling about how it looked like his Chevy engine with 90k on it. He nearly **** himself when I told him the estimated mileage.
Hondaslayer is offline   Reply With Quote
Old 06-02-2005, 12:35 AM   #8
reddevil
Scooby Guru
 
Member#: 64673
Join Date: Jun 2004
Chapter/Region: NWIC
Location: portland
Vehicle:
1990 Legacy wagon
goes 12.387 @ 116.5

Default

Steel cylinder, aluminium piston, ring floating on oil (you hope) = cross hatches forever.

The only way you will lose the cross hatching is if you are actually destroying your engine and shiz gets stuck between the piston and the wall. I am now on the third rebuild of my 1990 legacy block and you can be sure that it has all its crosshatches.
reddevil is offline   Reply With Quote
Old 06-02-2005, 12:45 AM   #9
wrxsubaru
Scooby Specialist
 
Member#: 65133
Join Date: Jun 2004
Chapter/Region: NWIC
Location: Seattle
Default

Yeah i changed some head gaskets on my moms 91 legacy with 200,000 miles on it and they were very visible.
wrxsubaru is offline   Reply With Quote
Old 06-02-2005, 05:16 AM   #10
ncarn8
Scooby Specialist
 
Member#: 71419
Join Date: Sep 2004
Default

same here, 180000kms and still completely there, in fact the wear on the rings was so small it was difficult to measure. These engines are remarkable.
Only thing worn was the mains showing a little scuffing and the top layer was worn away.
ncarn8 is offline   Reply With Quote
Reply

Thread Tools
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 Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Blown head gaskets, warped heads and a piston melted to the cylinder wall Borjaq Warranty Issues & SOA Problems 13 05-22-2010 10:16 PM
Injector and piston/cylinder wall clean up question? petrakov08 Built Motor Discussion 18 03-07-2010 10:34 PM
Question about cyl. walls and motor. ASPEN06 Built Motor Discussion 2 03-02-2007 10:12 PM
Question about cylinder heads on WRX artdoesart Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 4 10-13-2004 02:05 PM
questions about cylinder #'s EJ20G smacksube Subaru Conversions 3 12-10-2003 04:59 PM

All times are GMT -4. The time now is 10:13 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2024 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.

When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission
Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.