Skip to content
View in the app

A better way to browse. Learn more.

Ultimate Subaru Message Board

A full-screen app on your home screen with push notifications, badges and more.

To install this app on iOS and iPadOS
  1. Tap the Share icon in Safari
  2. Scroll the menu and tap Add to Home Screen.
  3. Tap Add in the top-right corner.
To install this app on Android
  1. Tap the 3-dot menu (⋮) in the top-right corner of the browser.
  2. Tap Add to Home screen or Install app.
  3. Confirm by tapping Install.

Engine H4SO U5

Featured Replies

Downloading the engine manual from Subaru. The base 4 cyl engine is listed as H4SO but then there is a H4SO U5 variation as well. Anybody know the difference?

  • Author

2005 Outback automatic with standard 4 cylinder. I'm doing this for a family member so don't have the VIN offhand. I should ask the Subaru folks but I'm a little perturbed with this 20 PDF's an hour crap. I guess you get what you pay for. The U5 designation appears to be more then just the engine... differences are just in engine and emissions sections I believe, otherwise manual appears to be the same.

 

What year and model are you d/l for?

 

From what I have seen in some models....the main difference is how the wiring is laid out.

  • Author

No answer from the Legacy folks although plenty of vacation pix over there :). I think "U5" is California spec vehicle... more stringent emissions.

 

Anyway, got my manual. Wish I would have had the time to get the "Mechanism and Function" sections but I only got to the engine specific sections of those before time ran out. If anyone has these, I would be interested.

 

Hmm....not sure about the US designation.

 

Yeah the 20 pdf an hour thing sucks.

 

You may want to ask the guys on www.legacygt.com/forums as they may be more familar with the manuals.

Please sign in to comment

You will be able to leave a comment after signing in

Sign In Now

Account

Navigation

Search

Search

Configure browser push notifications

Chrome (Android)
  1. Tap the lock icon next to the address bar.
  2. Tap Permissions → Notifications.
  3. Adjust your preference.
Chrome (Desktop)
  1. Click the padlock icon in the address bar.
  2. Select Site settings.
  3. Find Notifications and adjust your preference.