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Mechanical Maintenance (Oil, Fluids, Break-In, Servicing) Everything related to the mechanical maintenance of the FR-S and BRZ |
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02-14-2015, 04:10 AM | #1 | |
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What brake fluid do you use when bleeding/flushing the clutch?
I want to flush my clutch fluid but I have never done it before. For those who have, what brake fluid did you choose and why? Also, how much fluid do I need?
The service manual only lists the following: Quote:
I bought my FRS back in June of 2012 and I have a little over 32K miles on it now, but it wasn't until last year when I installed the Innovate super charger that I started having trouble getting into first gear and reverse on warm days (80+ F) or after a 20 minute track session. I checked the clutch fluid reservoir and the fluid is dark brown. I'm hoping that flushing the clutch fluid will help with this problem. I searched the forums and I found a very informative DIY on how to replace the clutch slave cylinder, but I couldn't find anything on how much fluid I would need to flush the system and if there were any fluid preferences. Thanks in advance for your help and suggestions
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02-14-2015, 11:22 AM | #2 |
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I use the same as I do in my brakes, ATE TYP 200. Slightly lower boiling point than RBF, but it's half the price and if you boil any decent DOT4 you should look at cooling solutions rather than fluid solutions.
*edit, it does not take much fluid at all. You can do your brake system and clutch on one liter easily. |
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02-14-2015, 12:54 PM | #3 |
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I just recently did the clutch slave cylinder swap and I just used the standard Subaru brake fluid, works fine as far as I know.
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The Following User Says Thank You to JB86'd For This Useful Post: | MINOCIN (02-18-2015) |
02-14-2015, 02:37 PM | #4 |
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I used Motul RBF600 and bought two 0.5 liter bottles. $30 shipped
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The Following User Says Thank You to tomaszjanczak For This Useful Post: | MINOCIN (02-18-2015) |
02-18-2015, 01:17 AM | #5 |
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Thanks guys. I decided to go ahead and purchase some RBF600 from Counter Space Garage since I was already making a couple of other purchase with them anyway. I purchased two 500 mL bottles.
I'm hoping the fluid flush will help with the clutch problem. I agree that addressing the heat issue directly would be best if it is indeed the culprit,but as we all know combating the heat isn't easy, especially when you are at the track.
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02-18-2015, 01:53 AM | #6 |
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Ultra's forester slave cylinder retrofit is simply awesome. One of the first mods I've done on the car and I absolutely love how it improved clutch feel. Sorry for slightly OT
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08-23-2020, 05:02 AM | #7 | |
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Quote:
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2013 Firestorm FR-S, Kraftwerks C38 kit, FT-86 UEL Catted Headers, TRD D-Tip cat-back, Vibrant 1140 Resonator, Exedy Stage 1 Normal/smoother clutch that replaced the Stage 2 3-puck clutch, Exedy Lightweight flywheel, DSS carbon fiber driveshaft, TEIN springs on performance package Sachs dampers, Megan Racing Inner tie rods, 17x8 +35 Enkei Silver RPF1's, OS-Giken 1.5-way diff, J-Luth steering wheel and now a GKTech angle kit-- which rubs.
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08-24-2020, 12:07 PM | #8 |
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Changed out my clutch fluid using the generic yellow bottle Prestone DOT 4 brake fluid. Didn't really notice any difference to be honest. Shifts were fine before and fine afterwards.
Fresh transmission fluid and adjusting the clutch engagement point a little higher made the biggest difference for me in terms of smoother shifting.
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