S2000 Under The Hood S2000 Technical and Mechanical discussions.

Motul RBF600........

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Old 10-16-2004 | 05:06 AM
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Default Motul RBF600........

I just had my clutch fluid and brake fluid flushed 2 days ago at a reputable mechanic shop with tons of S2000 experience and I replaced it with the Motul RBF 600 fluid.

Correct me if I'm wrong but I thought your brake pedal and clutch pedal is suppose to feel firmer after you change the fluids? For some reason both the pedals have a softer feel!!! I checked the level of the brake fluid and it's at the maximum point............so that rules out the possibility of not having enough fluid.

Are my expectations too high or is this a normal result?
Old 10-16-2004 | 07:11 AM
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Flushing and bleeding brake and clutch fluid is not rocket science but it can be done wrong. Depending upon the method used, it may still have been done "not in the best way". For example if they used the vacuum method with one person doing the job, it's possible to suck air into the system. This would give you that "softer" feel. If the guy was in a hurry to do the job, he may not have kept the fluid in the reservoir above the hole at the bottom. This is a typical mistake. He may have come really close and just figured that he caught it in time.
Just drive it for a while. Sometimes, a little air can work itself out and if it's really small, you might get away with it. At the very least, your brakes and clutch should feel about the same, not softer.
Old 10-16-2004 | 08:01 AM
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I replaced my brake fluid with the Motul about 2 months ago. There was no difference in pedal feel from the change in fluid but it does maintain pedal response slightly longer under hard driving conditions.
Old 10-16-2004 | 01:14 PM
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well I was there watching when they did the brake fluid and there were 2 ppl working on the car.....one was in the car pumping the brakes......maybe that's when the air got in...I mean you are just suppose to step on it firmly not pump it right?

I would have been satisfied with the pedal feel being the same but not softer. The clutch pedal feels like that of a civic SIR hatchback!!! And the brakes needs to be pressed slightly more to get the same gripping feedback.

Would this problem result in me wearing out my clutch and brake pads sooner?
Old 10-16-2004 | 01:33 PM
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Originally Posted by bunjimobile,Oct 16 2004, 02:14 PM
Would this problem result in me wearing out my clutch and brake pads sooner?
No, you just won't get the same brake application with the same pedal pressure and your clutch may not fully disengage, which could make for slightly more syncro wear.

By the sounds of your last description, you've got air in both systems. Maybe the place you had this done has lots of S2000 experience. Perhaps where you live, you have lots of S2000s that have been serviced WRONG!

BTW, no, you do NOT pump the pedals to do this job. Unless of course, your description of "pump" is not quite accurate.
Old 10-17-2004 | 03:42 AM
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well I'll see what happens next week and hopfully the pedal feel will firm up.........
if not then I'll just get them to bleed it for me to remove the air that they let in.
Old 10-17-2004 | 04:52 AM
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If anything, the pedals should be firmer once fluid is flushed and bled properly. At least that's been my experience with my car. I'd have it redone just to make sure. It took me longer to bleed the clutch than I thought it would (and I used more fluid than I thought I would), so maybe the technicians gave up too soon.

On a side note, Motul 600 is an excellent choice for the track, and for a daily driver. I had thought that it wasn't as good as other premium brands, but I was wrong. It offers higher wet and dry boiling points compared to other fluids I have used successfully on the track.

Here's some data, temperatures in degrees Farenheit:

Motul 600 - 593 Dry, 420 Wet
ATE Super Blue - 536 Dry, 392 Wet
Valvoline SynPower - 502 Dry, 343 Wet

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Old 10-17-2004 | 08:33 AM
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^^^ That was exactally what prompted me to go with the Motul.

As for the quality of service. I would call the dealer asap and have one of the service reps log this problem since you have had it from day 1 so that when/if you do bring the car back in they know it was their fault.
Old 10-17-2004 | 11:38 PM
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well the thing is it wasn't done at the dealer..........I brought it down to a very reputable car shop (owned by a friend) and they have the most S2000 experience in Vancouver. They only charged me $40USD for labor and $36USD for 3 bottles of Motul RBF600 (3 bottles because they needed the extra 500ml to flush).

The labor cost covered the Brake and Clutch fluid. The dealer would have raped me silly with the cost of it......Labor alone would have cost me $100 at the dealer!!! I will definitely give the shop a ring for a bleeding appointment if the problem still persist the coming week.
Old 10-18-2004 | 06:47 AM
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Motul 600 is an excellent choice for the track, and for a daily driver
RBF600 is NOT good for everyday driving.
Its life span is very short because it is DESIGNED for just track.
You will end up changing brake fluid every 5-10k mile. It degrades very quickly.
Try Motul DOT 5.1 which is designed for street driving.



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