Welcome to the North American Subaru Impreza Owners Club Friday October 20, 2017
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
Go Back   NASIOC > NASIOC Subaru Models > Impreza Forum

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.
* Registered users of the site do not see these ads. 
Thread Tools Display Modes
Old 04-27-2001, 07:45 AM   #1
Scooby Specialist
Member#: 807
Join Date: Jan 2000
Location: Greenville, SC
2002 WRX Wagon

Post Factory worn engine?

I just read the good explanation about how and why an engine breaks in: http://www.i-club.com/ubb-files/Foru.../022071-2.html

I'm wondering why if every engine has to go through this break-in period where you have to drive it softly and everything, why the manufacturer just doesn't make that part of the production process? Why can't they just run the engines hot in the factory for 500 miles and break them in perfectly (I'm sure they could figure out the best way to do it), then drop them in the cars and ship them out?

It just doesn't make any sense to send out a product that's really partially complete, giving the consumer the chance to mess it up in the final stage of production (break-in).
* Registered users of the site do not see these ads.
bryanw is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 04-27-2001, 07:51 AM   #2
Scooby Guru
Member#: 114
Join Date: Jul 1999
Chapter/Region: MWSOC
Location: Wichita, KS and Whoring, OT
'03 Evo, Rice White
'01 Erion CBR 929


Um, cost. That was easy... next?
ColinL is offline   Reply With Quote
Old 04-27-2001, 07:57 AM   #3
Scooby Specialist
Member#: 4864
Join Date: Mar 2001
Location: North Bend, WA USA
2004 WRX


Ever wonder why a Porsche costs so much?

Poseidon is offline   Reply With Quote
Old 04-27-2001, 07:02 PM   #4
Scooby Newbie
Member#: 6110
Join Date: Apr 2001
Location: Lonaconing, MD USA
98 Impreza L


Good explanation.. Garsh.. Thanks

Cost is definitly a reason. Does porsche break in their engines? That's cool if they do, I wasn't aware of that.

One thing I have read about is that since people have different driving habits the engines will wear specifically to the way the engine is driven. I'm not sure about the technical details, since I've never experienced poor engine break in, (knock on wood) but I've read examples of people who have bought cars from gentle drivers, you know... people who never aproach redline, (makes me shiver just thinking about it), and they immediately pop in a big cam, huge carb, big blower, etc. Well once they do that the thing doesn't run with near the potential that it should.

They are baffled, and upon tearing the engine apart to see what is wrong they find the rings aren't even scuffed in. The engine ran fine for the gentle driver, because the rings were worn sufficiently during break in to handle the mild pressure, but once joe motor head gets it and tries to put the squeeze on it they just blow all kinds of exhaust gas by.

I've always condoned the use of full throttle during breakin.. but only for very short bursts. Especially during the first 200 miles. Very gentle for the first 100, then varying 5 to 20 second full throttle bursts to about 4 grand till 200 miles, add another 5 to 20 seconds for every hundred miles after that till you reach a thousand miles. Then it's a free for all... wooo hooo.. don't forget to change your oil after 1500 miles to get rid of all those microspic chunks of metal.

By the way my wifes Legacy just passed 1000 miles.. It feels GOOD to wind it up now. Gotta get some AGXs and a rear sway bar for it soon.
pottsie350 is offline   Reply With Quote

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
Highlander at Lafayette, Ind., factory mattejb Non-Subaru News & Rumors 7 06-02-2010 08:20 PM
ABS, Airbag, and Rear Diff light on after washing engine Acejam2k Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo) 6 06-02-2010 12:32 PM
Question on factory replaced engine.... pete1122 Service & Maintenance 2 09-11-2008 02:39 PM
PC on 05 STi rims with worn factory tires? fizzak Tire & Wheel 2 05-14-2008 04:15 PM
Major problem...possible worn engine? alwrxwu Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 4 01-22-2008 04:54 PM

All times are GMT -4. The time now is 04:55 PM.

Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2017 Axivo Inc.
Copyright ©1999 - 2017, North American Subaru Impreza Owners Club, Inc.