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07-27-2012, 11:35 AM | #1 |
Scooby Guru
Member#: 134005
Join Date: Dec 2006
Chapter/Region:
MAIC
Location: Pittsburgh, PA
Vehicle:2004 WRX Premium PSM |
Timing belt service - what else?
I'm not a noob to timing belt services.. had one replaced on a '98 OBS and another on an '04 Forester.
The WRX is at 94k and has a whining coming from what I believe is the alternator pulley, but I can't confirm it 100%. It MIGHT be the timing belt, so for now I'm not driving it. Things I'll be replacing: Timing belt All idlers Tensioner Waterpump Thermostat Possibly the cam and crank seals I'll be using OEM parts... but I've seen Grimmspeed has this 160 degree thermostat. Would this be better than OEM? Anything else WRX specific I should change too? Thanks.
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Last edited by cmiovino; 07-27-2012 at 11:44 AM. |
07-27-2012, 11:47 AM | #2 |
Former Vendor
Member#: 207954
Join Date: Apr 2009
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Looks like a good list, I would also do the accessory belts as well if you have not recently.
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07-27-2012, 11:49 AM | #3 | |
Scooby Guru
Member#: 134005
Join Date: Dec 2006
Chapter/Region:
MAIC
Location: Pittsburgh, PA
Vehicle:2004 WRX Premium PSM |
Quote:
Engine appears to be in great condition, no knocking, runs super smooth... but that whining concerns me that something could break or slip. Can't be too careful down there. |
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07-27-2012, 12:27 PM | #4 |
Scooby Guru
Member#: 70710
Join Date: Sep 2004
Chapter/Region:
Tri-State
Location: Quakertown/AREA1320 391whp
Vehicle:2002 04STi Swaped RS w/PPGS & 02 Wagon w/PPGs |
Your above mentioned bits to replace are smart in purchasing a used car .....if you have no proof they were done recently.
Im not a fan of paying extra $$$ for lower temp thermostats, but you can get it if you desire. I usualy just drill out the weep on the thermostat with a 3/16 bit to give it some extra flow....that will drop the temp a few degrees in itself. You may need to replace the valve cover gaskets too, particularly if the cam seals are leaking now. Also when the timing covers are off inspect the oil pimp all along its contact with the block this is a none oil leak area. Its just RTV Silicon and no gasket....pull it off clean both sides and re-toque with the RTV. The whining could be the Alt barrings starting to go. Take a rag and lightly spray it with Armor-all or something like that and as the motor is running touch it to the accessory belt on the inside where the grooves are and the sides. If the noise stops its the belt, if it doesn't stop its more then likely the Alt. To see if that's the culprit shoot the front of the Alt with WD40 behind the pulley while the motor is running. You can get the Alt barrings replaces for under $30 w/labor at any local auto-electrical repair place. ( not an autozone or pepboys ) You will know if they can do it probably in 30sec of talking to the guy behind the counter......if he is old enough to be your grandfather its a 99% yes Last edited by dangerousatom; 07-27-2012 at 12:49 PM. |
07-27-2012, 12:29 PM | #5 |
Scooby Guru
Member#: 21145
Join Date: Jul 2002
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NESIC
Location: Not in my own time
Vehicle:2002 Enemy of Aku |
Include the A/C idler pulley if that wasn't already part of "all idlers"
Use an OEM thermostat. It is designed to bring the engine up to normal operating temps before opening up to allow the radiator to aid in cooling. The 160 deg unit will open sooner, taking longer for the engine to warm up. |
07-27-2012, 01:29 PM | #6 | |
Scooby Guru
Member#: 134005
Join Date: Dec 2006
Chapter/Region:
MAIC
Location: Pittsburgh, PA
Vehicle:2004 WRX Premium PSM |
Quote:
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07-27-2012, 02:05 PM | #7 | |
Scooby Guru
Member#: 134005
Join Date: Dec 2006
Chapter/Region:
MAIC
Location: Pittsburgh, PA
Vehicle:2004 WRX Premium PSM |
Quote:
I've seen many 'kits' that include the 2 smooth ones and 1 cogged one for some reason. On my previous ones, I didn't replace any of them as they all spun smoothly. This time around, I'm going for the extra insurance. |
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07-27-2012, 02:08 PM | #8 | |
Scooby Specialist
Member#: 285270
Join Date: Jun 2011
Chapter/Region:
NESIC
Vehicle:03 WRX PSM |
Quote:
Also the GrimmSpeed thermo is designed to fail in the open position. The oem thermo, well it's not. Just a little peace of mind, knowing I won't cook my aluminum engine over a $30 thermostat. Just my .02 |
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07-28-2012, 06:46 PM | #9 | |
Scooby Specialist
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NWIC
Location: Coeur D Alene, ID
Vehicle:1996 Impreza outback Green |
Quote:
So, in total, there are 3 smooth pulleys and 1 toothed one and then the whole tensioner/pulley. Make sure to use a bit of blue loctite as well on the bolts that fasten the pulleys to the block and torque them down to specified settings. |
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07-28-2012, 07:19 PM | #10 |
Scooby Newbie
Member#: 327480
Join Date: Jul 2012
Location: Grafton, WI
Vehicle:2003 Impreza WRX White |
ac idler pulley??
Hey I just picked up a 2003 wrx and my car is making an awful chirping noise like a cricket. The guy told me that he replaced all the belts so thats not what it is, i tried tightening the ac idler pulley and the noise went away upon start up so it no longer chirps when the car is not moving but when i put it into gear and start driving it chirps. Help please, I'm new to Subaru.
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07-30-2012, 08:29 AM | #11 | |
Scooby Guru
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Join Date: Jul 2002
Chapter/Region:
NESIC
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Vehicle:2002 Enemy of Aku |
Quote:
Many people run the cooler temp thermostat when they live in hot climates in an attempt to get the car to run cooler. The sooner the thermostat opens, the sooner you are circulating coolant through the radiator. Ultimately, you will reach the same operating temp, it just takes longer on a lower temp thermostat than a higher temp thermostat. I wouldn't want to be running a low temp thermostat in NE winters |
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