Broken Timing Belt - Subaru Outback - Subaru Outback Forums
 5Likes
Reply
 
LinkBack Thread Tools Rate Thread
post #1 of 17 (permalink) Old 03-04-2019, 10:54 AM Thread Starter
Registered User
 
Jon98EJ25's Avatar
 
Join Date: Aug 2018
Posts: 31
Feedback Score: 0 reviews
Broken Timing Belt

Hi everyone,

Last night I went out to start my '98 OBW with the 2.5L and I believe the timing belt broke. It started cranking unevenly without starting. Sounds like it's only getting compression on 2/4 cylinders.

I'm annoyed because the PO told me this was replaced about a year ago or so. I did notice soon after buying the car there was a loud "whirring" sound in the front of it. I wondered to myself if the t-belt was installed improperly. Guess I got my answer.

Anyway, I'm getting a lot of conflicting information looking around on the internet whether or not this is an interference engine.

From what I gather, it sounds like there's no piston to valve interference, but there is the potential for valve to valve interference. Is this correct? Should I bother trying to replace the timing set, or are the valves certainly damaged?

The one thing I have going for me is, this happened while starting not while running in gear etc. Also, I didn't hear or feel any impact and the engine was cranking freely without obstruction as far as I could tell.

Is it also possible it jumped some teeth or something?

Thanks in advance for any and all advice.

-Jonathan


-Jonathan
1998 Subaru Outback
2.5L 5SPD
Jon98EJ25 is offline  
Sponsored Links
Advertisement
 
post #2 of 17 (permalink) Old 03-04-2019, 11:12 AM
Super Moderator
 
AWDFTW's Avatar
 
Join Date: May 2007
Location: TN
Car: 2006 2.5i and 2002 3.0 wagons.
Posts: 11,982
Feedback Score: 0 reviews
It's an interference engine. If the belt broke or jumped many teeth, valves and pistons typically get really acquainted with each other.


Have you considered the Google search bar at the top of the forum?

2002 Outback wagon 3.0 L.L. Bean no more: "Mal" 134,000 and counting.
Cloth interior swap. HIR1 high beam upgrade. Yellow Lamin-X fog light film.

2006 Outback 2.5i wagon: "Professor Sprout" 96,000 and counting.
HIR1 high beam upgrade.

Rust in Peace:
"Solstice" 1996 Outback wagon, totaled at 115K.
"Kaylee" 2003 Outback wagon, sold at 167K.
AWDFTW is offline  
post #3 of 17 (permalink) Old 03-04-2019, 11:17 AM Thread Starter
Registered User
 
Jon98EJ25's Avatar
 
Join Date: Aug 2018
Posts: 31
Feedback Score: 0 reviews
Ah darn. Okay thanks.

-Jonathan
1998 Subaru Outback
2.5L 5SPD
Jon98EJ25 is offline  
post #4 of 17 (permalink) Old 03-04-2019, 11:56 AM
Registered User
 
Performance Suby's Avatar
 
Join Date: Jul 2012
Location: Kitchener, Ontario
Car: 2003 OBW 2.5L 4EAT
Posts: 848
Feedback Score: 0 reviews
If you end up repairing the car, make sure to install a timing belt kit with all idler pulleys, tensioner and water pump. Sometimes people tend to not replace all of the components and then down the road issues arise, from part failure.

'03 Outback 2.5L 4cyl w/all-weather 4EAT
'06 Forester 2.5L 4cyl X Premium 4EAT
'05 Impreza 2.5L 4cyl RS Sport 5MT (current daily driver)
Performance Suby is offline  
post #5 of 17 (permalink) Old 03-04-2019, 12:04 PM Thread Starter
Registered User
 
Jon98EJ25's Avatar
 
Join Date: Aug 2018
Posts: 31
Feedback Score: 0 reviews
Yeah. Right now I'm trying to decide if I want to potentially buy heads for this car. I need to figure out if I want to just try the timing set first and maybe spend the money for nothing. I really like the car and would like to keep it, but I'm looking at probably $1,000 even at DIY prices. Kinda sucks.

I could pull the motor out and take the heads off to see what's going on, but I really like the idea of changing the timing set and having it fix the problem without all the extra work. This is my commuter so I need to have it up and running again as soon as possible.

Would it be a bad idea to just replace the valves if there's damage, or do the cam(s) usually get damaged as well? Is it better to just get new heads?

-Jonathan
1998 Subaru Outback
2.5L 5SPD
Jon98EJ25 is offline  
post #6 of 17 (permalink) Old 03-04-2019, 01:47 PM
Registered User
 
1 Lucky Texan's Avatar
 
Join Date: Jan 2004
Location: behind the Krell Metal door
Car: 03 H6 OBW & 06 WRX Sportwagon
Posts: 16,089
Feedback Score: 0 reviews
pull the covers and inspect the timing. find the tooth-count for the engine online, roatae by hande and count the teeth, very slight possibility you're off JUST enough teeth to not start, not enough to clash with pistons. That would be lucky. Often, belts are OK but the toothed idler fails.

how many miles on engine? if high - one approach might be to get a used engine, put MLS head gaskets and new timing parts on it and swap in. fewer miles and more reliability.

Time Flies Like an Arrow,
Fruit Flies Like a Banana!
1 Lucky Texan is online now  
post #7 of 17 (permalink) Old 03-04-2019, 06:22 PM Thread Starter
Registered User
 
Jon98EJ25's Avatar
 
Join Date: Aug 2018
Posts: 31
Feedback Score: 0 reviews
Texan, the car has about 151,000 on it. Not sure to what extent the timing set was serviced before. Maybe they didn't change everything out. I'm going to jump in there today and take a look. The fun part today will be trying to get the car out of the side-driveway, out on to my steep hill, turned around and back in the drive way. Might have to use the starter. Yeesh.

Thanks for the help!
Jon98EJ25 is offline  
post #8 of 17 (permalink) Old 03-04-2019, 06:29 PM
Registered User
 
Join Date: Jun 2016
Posts: 36
Feedback Score: 0 reviews
Most likely tensioner failed, and it jump a few teeth. You might be okay. Good luck!
miker104 likes this.
tdelker1 is offline  
post #9 of 17 (permalink) Old 03-04-2019, 06:49 PM
Registered User
 
AA8LL's Avatar
 
Join Date: Aug 2017
Location: Dayton, Ohio, USA
Car: 2017 Outback Limited 3.6 CVT, EyeSight+SRVD, 2-fob Subaru remote start
Posts: 19
Feedback Score: 0 reviews
All that maneuvering on the starter will probably finish off both the timing belt and the starter. I suggest you use a wrecker.
1 Lucky Texan and Tishers like this.
AA8LL is online now  
post #10 of 17 (permalink) Old 03-04-2019, 07:32 PM
Registered User
 
Wiscoutback87's Avatar
 
Join Date: Apr 2016
Location: Wisconsin
Car: 2014 Subaru Outback 2.5 Premium
Posts: 89
Garage
Feedback Score: 0 reviews
Quote:
Originally Posted by 1 Lucky Texan View Post
pull the covers and inspect the timing. find the tooth-count for the engine online, roatae by hande and count the teeth, very slight possibility you're off JUST enough teeth to not start, not enough to clash with pistons. That would be lucky. Often, belts are OK but the toothed idler fails.

how many miles on engine? if high - one approach might be to get a used engine, put MLS head gaskets and new timing parts on it and swap in. fewer miles and more reliability.
I was thinking the same thing, if timing is your goal a used engine swap might be the quickest route to take.


2014 Subaru Outback Premium 2.5
Wiscoutback87 is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Subaru Outback - Subaru Outback Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Rate This Thread
Rate This Thread:



Similar Threads
Thread Thread Starter Forum Replies Last Post
TD garage Berkeley Kidrock Gen 3: 2005-2009 2 10-14-2016 12:57 AM
Timing Belt Change mikec Problems & Maintenance 0 06-01-2013 02:20 PM
Timing belt tensioner bolt broken datski Problems & Maintenance 2 05-29-2013 11:02 PM
Choice of a timing belt kit eugenelt Problems & Maintenance 12 01-08-2012 04:13 PM
Broken Timing Belt rbutcher Problems & Maintenance 49 12-30-2010 01:51 PM

Posting Rules  
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome