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Old 10-02-2017, 11:05 AM   #1
Boomchakalaka
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Default Timing belt is loose

New to engine work! I'm starting to tear into my spare ej25 engine and one thing I've noticed is the serpentine belt is loose. Is this almost always due to a bad tensioner?
The belt itself isn't cracked, still has round ridges. Any test I can do without the need to start it?

Thanks guys!
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Old 10-02-2017, 12:05 PM   #2
Jack
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How old is the belt? I have belts hanging in my garage with over 100k miles on them that could pass for brand new. I use them for other projects (not as timing belts). So I'm saying that you can't look at a belt and determine that it's good. Replace it while you're doing the tensioner.
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Old 10-02-2017, 12:10 PM   #3
Charlie-III
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Quote:
Originally Posted by Jack View Post
How old is the belt? I have belts hanging in my garage with over 100k miles on them that could pass for brand new. I use them for other projects (not as timing belts). So I'm saying that you can't look at a belt and determine that it's good. Replace it while you're doing the tensioner.
Agreed.
Looking at a timing belt, all I can say is, "yes, that one is torn, cracking, etc., replace it", if it looks good but you have no clue on age or miles, replace it.
Oh, and if you get a Gates kit, find one with an "N" at the end of the PN, it's $20-30 more but has better bits in it than other Gates kits.
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Old 10-02-2017, 03:45 PM   #4
Boomchakalaka
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2002 Forester L
Silver

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Quote:
Originally Posted by Jack View Post
How old is the belt? I have belts hanging in my garage with over 100k miles on them that could pass for brand new. I use them for other projects (not as timing belts). So I'm saying that you can't look at a belt and determine that it's good. Replace it while you're doing the tensioner.
Engine has 80k but yeah I just don't know what was done. I'll replace the belt then just odd to see it looks great!
This is a dumb question but is the piston on the tensioner supposed to be greased/greasy? I've done suspension work mostly and when things weep I know I've got my problem lol
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Old 10-02-2017, 05:39 PM   #5
Charlie-III
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1998 Legacy 2.5GT
Silver Sleeper BK, 5MT

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Quote:
Originally Posted by Boomchakalaka View Post
Engine has 80k but yeah I just don't know what was done. I'll replace the belt then just odd to see it looks great!
This is a dumb question but is the piston on the tensioner supposed to be greased/greasy? I've done suspension work mostly and when things weep I know I've got my problem lol
A timing belt tensioner (regardless of mfr, model, engine, year, etc.) should NOT be leaking. This could be why your belt is loose.
Even more reason to do at least the TB and tensioner.
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Old 10-02-2017, 05:56 PM   #6
Boomchakalaka
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Quote:
Originally Posted by Charlie-III View Post
A timing belt tensioner (regardless of mfr, model, engine, year, etc.) should NOT be leaking. This could be why your belt is loose.
Even more reason to do at least the TB and tensioner.
Very good i know what's up now. Thank you!!
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