There are three reasons you would typically dive in and perform a timing service on your WRX or STI with an EJ20/255/257 engine.
Hitting the 100,000 mile mark is the most common one, next would be getting to the 10 year mark, and lastly would be a bearing raising a racket and telling you that it is time to freshen up all of those pulleys.
In the case of Jon's Sonic Yellow 2003 WRX, the 10 year mark hit right around the same time that one of the pulleys decided to go out.
When you get into the engine to pull off the timing covers, it is generally a good idea to replace anything that could also be starting to wear out so that you will most likely be set for the next 10 years or 100,000 miles, so that is what we did. We pulled just about everything from the Roger Clark Motorsport catalog to freshen up the EJ257 that is in this WRX.
Roger Clark Motorsports has the most options of Timing Belt Kits for most any Subaru. You can look at all of those options here:
https://www.flatironstuning.com/catalogsearch/result/?q=RCM%20Timing%20Belt
Here are links to all of the RCM parts that we used in the video, which are all available at www.flatironstuning.com
RCM STI Timing Belt Kit
https://www.flatironstuning.com/sen1166
RCM Dual Bearing Eccentric Idler pulleys
https://www.flatironstuning.com/rcm3330
RCM Race Spec Timing Belt Guide
https://www.flatironstuning.com/rcm3605
RCM Black Series Water Pump
https://www.flatironstuning.com/rcm3434
RCM Alloy Camshaft Pulley Kit
https://www.flatironstuning.com/rcm3365
RCM 11mm Oil Pump Kit
https://www.flatironstuning.com/sen1065
We go through how we picked these parts, and the whole process of getting them installed.
Thanks for watching and Stay Tuned!
In this Episode:
00:00 - Intro
00:41 - What is on the lift?
01:28 - Time to re-do the Timing - more than 10 years have passed
02:05 - A look at the RCM parts that are going on the engine
08:11 - Tear down begins
08:57 - How off can timing marks be with resurfaced heads?
10:19 - Cam Bolt Removal - Did they play nice?
12:03 - Found the pulley causing all the noise
13:03 - Taking off the oil pump
15:18 - Radiator needs to be replaced, hoses need to be replaced...
16:06 - When parts start going back on, things start to get a bit more exciting
16:50 - Oil Pump install
21:39 - Oil pump seal or front main seal install
23:18 - RCM Alloy Cam Pulley install
24:23 - Checking timing belt alignment
24:58 - RCM Dual Bearing Eccentric Idler Pulley install
29:40 - When would you need adjustable Eccentric Idler pulleys?
32:02 - RCM Motorsports Timing Belt Guide install
34:30 - Oil Cooler and water pump hoses installed
35:03 - Trimming the center timing cover to fit with the RCM Motorsports Timing Belt Guide
36:18 - Priming the oil pump after install
37:10 - Filling up the coolant and first start
38:30 - Final thoughts after burping the coolant
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