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Old 06-08-2019, 09:24 AM   #1
Asm123
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Default 2015+ WRX Timing Chain Replacement Interval

Well I'm confused. The factory service manual for my car doesn't provide a recommendation on when to replace the timing chain for the WRX but does provide a recommendation for the STI replacement. I found a post online that says it doesn't need to be replaced but I haven't found where Subaru itself says that and honestly that doesn't sound right at all. Does Subaru have some magic where their timing chains don't deform over time? Any ways does anyone have a guidance for this? Thanks
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Old 06-08-2019, 09:46 AM   #2
Charlie-III
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Most timing chains, any brand car, have no scheduled replacement schedule (time or miles). They say to replace "when needed" along with other bits.

Maybe someone has a better lead regarding the STi vs. WRX.
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Old 06-08-2019, 10:07 AM   #3
Asm123
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I've been doing some additional googling and I think you're correct but I still don't like that answer. I remember getting my old sentra timing chain replaced when needed at about ~120000 and when that happened the other bits that needed replacing were the engine. I really don't like the idea of allowing an item like that go to failure when failure can cause an engine replacement.
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Old 06-08-2019, 03:34 PM   #4
Mulder
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The STi still has the EJ motor which uses a belt with a specified replacement interval. The '15-up WRX has the FA motor with a chain. There is no service interval for the chain and it should last the life of the motor with proper maintenance (primarily timely oil changes with the right oil).
So just follow the recommended maintenance schedule and don't worry about the chain.
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Old 06-08-2019, 11:54 PM   #5
CosmoTheCat
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What Mulder said. You replace the timing chain when you start getting cam/crank correlation errors due to stretching beyond the ability of the tensioners to take up slack.
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Old 06-09-2019, 01:01 AM   #6
jasonwrx86
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Usually timing chain lasts the life of the engine.
You will have other issues before you chain fail.
The chains are tensioned with oil pressure plus the engine has variable cam timing.
Everything is variable nowadays to allow best performance and longevity.
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Old 06-09-2019, 08:47 AM   #7
Charlie-III
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Quote:
Originally Posted by Mulder View Post
The STi still has the EJ motor which uses a belt with a specified replacement interval. The '15-up WRX has the FA motor with a chain. There is no service interval for the chain and it should last the life of the motor with proper maintenance (primarily timely oil changes with the right oil).
So just follow the recommended maintenance schedule and don't worry about the chain.
Doh.....I should know the STi still has the EJ, thus belt which has a time AND miles interval.
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Old 06-09-2019, 02:31 PM   #8
Big-E
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96,000 miles (153.6 km) or 96 months, whichever comes first.

*EDIT*

This is for the WRX STI 2015 and newer - I wasn't paying attention.

I will take a look to see what it is for the FA DIT 2.0.

*EDIT*

There is nothing specified or noted within the 2015 FSM for the FA DIT 2.0 regarding the timing-chain, chain-guides, tensioners, etc.

Last edited by Big-E; 06-18-2019 at 11:52 AM.
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Old 06-10-2019, 09:36 PM   #9
CosmoTheCat
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Quote:
Originally Posted by Big-E View Post
96,000 miles (153.6 km) or 96 months, whichever comes first.
When did that change?
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Old 10-09-2019, 05:12 PM   #10
honeybucket
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I was looking at the maintenance booklet that came with my 2018 WRX and it says to replace the "timing belt" at 96k, it must be a misprint because to my knowledge the car has a timing chain and they are good for the life of the engine.
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Old 10-09-2019, 07:57 PM   #11
CaptainSlowbaru
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Quote:
Originally Posted by CosmoTheCat View Post
When did that change?
On the VA STi, the interval was reduced. On '14 and older, 105k miles or 105 months (9 years, 8 months) is still the official timing belt interval.

OP: Timing chains are lifetime. The only time I've ever replaced chains was after catastrophic engine damage. Otherwise, regular maintenance should keep the chains in good shape for at least 200k, if not more. The guides are the only thing that would really wear, and even then, the tensioners would take up that slack.

Frankly, the factory Fuji-bond will fail and require a re-seal before the guides wear out, which means they can be easily inspected while the front cover is already off.
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