Jump to content


Welcome to Ultimate Subaru Message Board, my lurker friend!

Welcome to Ultimate Subaru Message Board, an unparalleled Subaru community full of the greatest Subaru gurus and modders on the planet! We offer technical information and discussion about all things Subaru, the best and most popular all wheel drive vehicles ever created.

We offer all this information for free to everyone, even lurkers like you! All we ask in return is that you sign up and give back some of what you get out - without our awesome registered users none of this would be possible! Plus, you get way more great stuff as a member! Lurk to lose, participate to WIN*!
  • Say hello and join the conversation
  • Subscribe to topics and forums to get automatic updates
  • Get your own profile and make new friends
  • Classifieds with all sorts of Subaru goodies
  • Photo hosting in our gallery
  • Meet other cool people with cool cars
Seriously, what are you waiting for? Make your life more fulfilling and join today! You and your Subaru won't regret it, we guarantee** it.

* The joy of participation and being generally awesome constitutes winning
** Not an actual guarantee, but seriously, you probably won't regret it!

Serving the Subaru Community since May 18th, 1998!

Guest Message by DevFuse
 

Photo
- - - - -

T-Belt Tensioner and Idlers


  • Please log in to reply
5 replies to this topic

#1 hohieu

hohieu

    Subaru Nut

  • Members
  • 569 posts
  • Philadelphia

Posted 12 July 2004 - 11:09 AM

Hello All,

I've read through all the threads concerning Timing Belt replacements, and have noticed some conflicting info. concerning the tensioner and the idlers. I have a Phase II 2.5 engine for which the replacement intervals are 105K miles, and, thanks to this invaluable forum, I am up to date on all other items that should be replaced: i.e. water pump, T-stat and seal, cam seals (2), crank (seal), and oil pump service. But some say that they've never seen a T-belt tensioner go bad while others have seen them fail.

I have two questions: 1)How do you check if the idlers are ok, aside from making sure that they're rolling smoothly when the belt is off?
The Phase II 2.5 engine has 3 idlers, 1 cogged roller and 2 smooth rollers.
2) Will the tensioner hold up until the 2nd T-Belt replacement at 210K miles (I imagine that either the the smooth roller or the spring-loaded pin could go on this assembly)? If you've replaced these items, please inidcate the mileage at which they were done.

My driving habits are pretty conservative, with longevity and gas mileage in mind rather than performance. I drive about 50/50 highway/city. Thanks in advance for your thoughts.

#2 cookie

cookie

    Elite Master of the Subaru

  • Members
  • 3,058 posts
  • SFO

Posted 12 July 2004 - 04:11 PM

but on my car I had both water pump and tensioner changed at 90,000. the results are too catestrophic on an interference engine to take a chance for me.
Some folks say a water pump lasts 200,000 and a tensioner can do that too. Not on my car.

#3 hohieu

hohieu

    Subaru Nut

  • Members
  • 569 posts
  • Philadelphia

Posted 12 July 2004 - 06:42 PM

but on my car I had both water pump and tensioner changed at 90,000. the results are too catestrophic on an interference engine to take a chance for me.
Some folks say a water pump lasts 200,000 and a tensioner can do that too. Not on my car.


I am definitely changing the water pump - they failed at around 100K on previous Hondas my family has owned - and, you're right, I wouldn't want to chance it with these engines. Even if water pump failure does not result in valve train damage, I would rather not flush the cooling system more often than the 30K-mile intervals.

#4 cookie

cookie

    Elite Master of the Subaru

  • Members
  • 3,058 posts
  • SFO

Posted 12 July 2004 - 06:45 PM

if it goes the engine goes south. Can you say bent valves? where is Mr. Rodgers now that we need him?
I think your choice of changing it is money well spent.

#5 tcspeer

tcspeer

    1000+ Super USER!

  • Members
  • 1,444 posts
  • Walnut Springs

Posted 12 July 2004 - 09:23 PM

After second belt, change all of them. Mine went out at 288,000 miles cost me an engine.

#6 hohieu

hohieu

    Subaru Nut

  • Members
  • 569 posts
  • Philadelphia

Posted 12 July 2004 - 09:52 PM

After second belt, change all of them. Mine went out at 288,000 miles cost me an engine.

Cool -- that's exactly what I'm planning to do, unless I get more advice to the contrary. Thanks, though I am sorry that this advice comes at the expense of your engine, especially as you were just shy of the 300K-mile mark.




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users