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Old 08-08-2019, 08:30 AM   #1
aloferradas
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Member#: 398157
Join Date: Aug 2014
Chapter/Region: SCIC
Location: Los Angeles
Vehicle:
2004 WRX Sedan
JBP

Default 04 WRX- Changing timing belt tomorrow

Hey what's up Subaru fam.

Going to be replacing my timing belt, idler pulleys, tensioner, thermostat, and water pump tomorrow on my 2004 WRX mt. Been planning this work for a while now and finally have the parts and time to do it.

I've researched a ton and gone through many of the guides available on how to perform this job.

I have the company 23 cam lock tool since lining everything back up and making sure the timing is good with my new system is the part I'm most paranoid of.

If anyone with experience has any last min tips/tricks to help my job it would be greatly appreciated.


Thanks!
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Old 08-11-2019, 12:48 AM   #2
Lian
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2005 Impreza 2.5RS
Silver Metallic

Default Some Questions For You

So i have a 2.5RS NA. Just got it a few weeks ago. I think i may need to replace the belts aswell but not sure. What sounds would you be hearing from a worn belt?
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Old 08-12-2019, 10:48 AM   #3
aloferradas
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Originally Posted by Lian View Post
So i have a 2.5RS NA. Just got it a few weeks ago. I think i may need to replace the belts aswell but not sure. What sounds would you be hearing from a worn belt?
Check you accessory belts. They may be the culprits. My AC idler pulley went bad and was making noise a year ago. Replaced it and it was as good as new. The timing belt should be replaced at 100K so if that hasnt been done you should start thinking of doing that.
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Old 08-12-2019, 11:00 PM   #4
BlueRibbonRyan
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Location: Collegeville, PA
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2019 WRX STi
World Rally Blue

Default

Along with 100k miles I also say never let a timing belt go more than 10 years old, had a Mitsubishi that only had 50k miles in my shop once that the belt completely shredded from age. As for tips and tricks, my best friend when doing any DOHC timing belt is patience!! If things aren't lining up and you get frustrated, step away instead of acting on the frustration. Also, do not over torque anything, have seen people snap bolts to tensioner and idlers. Other than that just triple check all timing marks before allowing tension and I assume it will have the guide above the crank pulley that needs proper gap since its manual transmission. Always turn motor a few rotations and double check all marks line back up before reassembly.
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Old 08-13-2019, 05:33 PM   #5
aloferradas
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Originally Posted by BlueRibbonRyan View Post
Along with 100k miles I also say never let a timing belt go more than 10 years old, had a Mitsubishi that only had 50k miles in my shop once that the belt completely shredded from age. As for tips and tricks, my best friend when doing any DOHC timing belt is patience!! If things aren't lining up and you get frustrated, step away instead of acting on the frustration. Also, do not over torque anything, have seen people snap bolts to tensioner and idlers. Other than that just triple check all timing marks before allowing tension and I assume it will have the guide above the crank pulley that needs proper gap since its manual transmission. Always turn motor a few rotations and double check all marks line back up before reassembly.
Thanks for the feedback. I ended up doing the timing belt this past Friday. Wish I would've seen your warning on not over torquing things sooner... I got my torque specs mixed up and stripped the threads in 2 locations out of the block while installing the new water pump. It was a headache and a half. On the bright side: I now know how to use a helicoil kit haha. After using the helicol kit to install new M6 x 1 threads for the water pump bolts everything went smoothly.
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Old 08-14-2019, 07:33 AM   #6
Phillyg9600
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Default How

How long did it take you ? My 04 wrx is due for it and a few other things I've been putting off
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Old 08-14-2019, 03:06 PM   #7
aloferradas
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Originally Posted by Phillyg9600 View Post
How long did it take you ? My 04 wrx is due for it and a few other things I've been putting off
Taking my time and doing it by myself it took me about 6 hours. This is not including the time it took me to diagnose and resolve the stripped bolt hole issue in my block (took me about 3.5 hours total for that).
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