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Old 03-07-2004, 01:00 AM   #1
wlchan
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Join Date: Oct 2002
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2002 wrx
Silver

Default Question about 30K

I know this subject has been covered a lot, but I still have a few questions that I could not find with the search. I have 32k miles on my car right now.

1. I'm thinking switching my transmission oil to redline superlite shockproof. Do I need to do a flush when I switch? If so, how? If not, is it alright to mix regular with synthetic? Also, that redline is rated at 70w90, but the manual says to use 75w90. Will this be alright?

2. I want to do my spark plugs too, but I do not want to use the platinum ones. I want to use the copper ones. I heard that they perform a little better, but doesn't last that long. I want to know the part number for the copper spark plugs for my 02wrx. Also what is the difference between the stock plugs and the "NGK 1 step colder copper plugs?" Which one is better?

Wei
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Old 03-07-2004, 01:42 AM   #2
cnk
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1. You don't have to flush, just drain as much as you can out and then fill it up. . .3.7Qt's IIRC. You should use 75W90 as that's what is recommended. Our trannies are fickle as it is. I haven't tried shockproof so I can't tell you how well it performs. I put in 75W90NS in the tranny and 75W90 in the rear diff.

2. Most people go to a colder plug when modifying their engine with TBE, uppipe, etc. The colder plug prevents detonation by not heating up as much and igniting early. The NGK part number for 1-step colder plugs is BKR7E IIRC.

Calvin
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Old 03-07-2004, 09:29 PM   #3
wlchan
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2002 wrx
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I have a few mores questions.

1. Where can I find THREE BOND 1105 that is require for the rear differential?

2. Are http://www.speedbleeder.com/ worth the money? Or is it easy to do without those? Where can I find a detail instruction on changing the brake fluids (like instructions at scoobymods where they have lots of pictures and explainations)? I found a lot of threads on how to do it, but none of them had many pictures.

3. I want to switch my brake fluid to Motul 600. When draining, how will I know when the old fluid ends and the new fluid starts?

4. If I was to buy the BKR7E, does it come gapped already or does that not matter?

Thanks guys for answering all of my questions. I just wanted to get everything straight before I start ordering everything for my car.

Wei
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Old 03-07-2004, 10:29 PM   #4
Psydotek
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1. ThreeBond? Some kind of sealant for the differential plugs? Some people use Loctite or some other comparable thread locker (i.e. Permatex Threadlock, can be found at Kragen). I've seen other people use teflon tape. I didn't use anything at all and i'm not leaking fluid from my rear differential. The most important thing is to torque the plugs correctly (most important to me anyways). 36.2 ft/lbs for both the fill and drain plug.

2. Overboost.com - Power Maintenance - Brake Bleeding Check there, some good tips and pictures (not subaru specific, but most calipers and brake systems work the same way).

3. You'd have to get a different color brake fluid. When the brake fluid being bled changes colors, you'll know it's all purged. (now the problem is finding a different color...)

4. ? No idea, but i'm sure someone chime in eventually.

-Henry

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Old 03-14-2004, 01:13 AM   #5
wlchan
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Is the front differential the same as the transmission? I thougth I read on the service manual that my02 wrx has front and rear differential and transmission fluid that I needed to change. Can someone clarify this for me?

Wei
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Old 03-14-2004, 01:22 AM   #6
cnk
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The front diff is in the transmission housing so by changing the tranny fluid, you're also changing the front diff fluid. You need to change the tranny fluid and rear diff and you'll be fine.

Calvin
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Old 03-14-2004, 01:24 AM   #7
xenonk
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CNK, you got all the right answers! Now that's how a Specialist suppose to be.


Keefe
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Old 03-14-2004, 01:30 AM   #8
cnk
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Quote:
Originally posted by wlchan
I have a few mores questions.

1. Where can I find THREE BOND 1105 that is require for the rear differential?

2. Are http://www.speedbleeder.com/ worth the money? Or is it easy to do without those? Where can I find a detail instruction on changing the brake fluids (like instructions at scoobymods where they have lots of pictures and explainations)? I found a lot of threads on how to do it, but none of them had many pictures.

3. I want to switch my brake fluid to Motul 600. When draining, how will I know when the old fluid ends and the new fluid starts?

4. If I was to buy the BKR7E, does it come gapped already or does that not matter?

Thanks guys for answering all of my questions. I just wanted to get everything straight before I start ordering everything for my car.

Wei
Sorry. . missed this last time.

1. You don't need Three Bond. Just torque it down correctly and you shouldn't have any problems.

2. If you don't have someone to help you bleed the brakes, then I would recommend them. I used them the first time I ever bled my brakes and it made everything very simple and easy. There aren't too many pictures for the process because it's pretty self-explanatory by reading the instructions on Scoobymods or on Nasioc.

3. If you've never bled brakes before, get 2 bottles of Motul. You should only need 1 bottle, but that's assuming you don't waster any. Depending on how old the fluid is in your lines now, you may or may not be able to see the difference between the old fluid and the new. I was able to see a difference when I did mine, although it was a very slight difference. You could just bleed the brakes and see if you have any fluid left in the bottle. If you do, then you didn't get all the old stuff out. It should be fine even if a little of the old fluid is left in as it will just mix with the new fluid, but the whole idea is to get as much of the old fluid out as possible.

4. They are not gapped. You'll have to measure them and gap them to whatever gapping you want to use. I use .028mm.

Calvin
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Old 03-14-2004, 01:33 AM   #9
xenonk
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monochrome?

Default

Quote:
Originally posted by wlchan
I have a few mores questions.

1. Where can I find THREE BOND 1105 that is require for the rear differential?

2. Are http://www.speedbleeder.com/ worth the money? Or is it easy to do without those? Where can I find a detail instruction on changing the brake fluids (like instructions at scoobymods where they have lots of pictures and explainations)? I found a lot of threads on how to do it, but none of them had many pictures.

3. I want to switch my brake fluid to Motul 600. When draining, how will I know when the old fluid ends and the new fluid starts?

4. If I was to buy the BKR7E, does it come gapped already or does that not matter?

Wei
1. Dont need it, just torque like cnk said. Just make sure the plugs are clean before you plug them back into the diff. I used Redline 75w90 with LSD additive.. I also drained out the tranny as well and used the same Redline.. I used just under 5 qt. today for the tranny and rear lsd. Run the car warm and then drain the oil.. it will flow out faster and you'll get more of the old oil out. Takes about a good 20 mins before the oil stops leaking out of the car.. it's like sludge..

2. Speedbleeders are not neccessary.. but having a sober buddy helping you to bleed does Just make sure your buddy holding the pedal down doesnt let up before you tighten the valve up, or you'll have air flowing back into the lines.

3. You probably wont know if the fluids are the same color.. but usually if you go through a quart of the brake fluid, it's pretty much flushed.. I use ATE Super Blue Brake fluid and ATE Yellow Brake fluid (same stuff, just different color). You'll know when you do a full flush when the fluid changes color.

4. Ask the dealer about the plugs... some come pre-gapped, some not... I bought DENSO Iridium from www.sparkplugs.com and yes, gapping is important. You dont want it too far or the electrodes wont conduct and if it's too close, it wont ignite enough of the mixture to my understanding.. colder plugs are good when you are running the car really hard, especially if you are running lean...

Keefe
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Old 03-14-2004, 01:39 AM   #10
cnk
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DGM

Default

Quote:
Originally posted by xenonk
CNK, you got all the right answers! Now that's how a Specialist suppose to be.


Keefe
Not doing too bad yourself either there Keefe.

Calvin
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Old 03-14-2004, 08:27 AM   #11
wlchan
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Default

Are you guys ready for more questions?

Do our 02wrx have two throttle cables? I noticed that one of the two cables was a little loose. Should I be too concerned?

Wei
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Old 03-14-2004, 11:32 AM   #12
cnk
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1 cable is for throttle, the other is for cruise control IIRC. There is supposed to be slack in the throttle line as it will contract and get tighter as things heat up. I'm not at home so I can't look up the factory manuals for the proper amount of deflection in the cable. I'll look it up tonight if it hasn't already been posted. You shouldn't need to adjust it unless you're having problems though.

Calvin
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Old 03-18-2004, 04:03 AM   #13
wlchan
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2002 wrx
Silver

Default

I have a very serious problem that I need help on.

I recently: replace the spark plugs, change the tranny and rear differential fluids, oil change, air and fuel filter change.

My car is doing some really strange stuff right now.
1. The car makes these popping noises when I start moving from first gear. The noises feel and sound like it is almost right under the clutch area. It pops once on the left side and then once of the right side. It also makes these popping noises when I am turning at a slow speed, and sometimes when I'm cruising around 45mph.
2. The car makes these horrible clanking/grinding noise when I'm slowing down. This is not the same normal noise when you are slowing down while in gear.
3. These noises don't appear on cold starts. They usually appear after the car is warmed up.

This is really freaking me out. I have the car in the garage, and I'm afraid to even drive it around the block.

You guys think it might be my tranny fluid. When I replaced the fluid, I filled it up to the F mark. I checked it the next day, and it was at the same place. Then I checked it 2 days later while the car was hot, the fluid mark was half an inch above the F (the entire dipstick was completely filled with fluid when I first pulled it out). I check it the same day when the car was cold, and the fluid mark was half way between L and F. Would this cause the problem?

I would appreciate any input. Thanks.

Wei
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