how to properly break in a new clutch and flywheel - Page 2 - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

ericcastro · 08-17-2008, 12:01 PM

Like everyone stated. Its 500 miles.

Last month at the track, my clutch went,
Replaced it right there on the spot in 3 or 4 hours.
Replaced with OEM autozone clutch.
Didnt replace flywheel, didnt even rough with sand paper.
couldnt get the tiny throw out bearing out, but replaced everything else.

Drove down to the bathrooms and back to make sure nothing was binding.

Went right back out with the next run group and was clutch kicking the shit out of that guy ever since.

Its also my DD.

bigOdom1 · 08-17-2008, 12:03 PM

some people have great success like that most dont id always break it in

highly responsive · 08-17-2008, 12:15 PM

Quote:

Originally Posted by S14DB

Did you at least clean it with brake cleaner and get most of the old matererial off? I hope the new and old clutch is the same material.

You still have to break in the Clutch disc and heat cycle the new pressure plate. Clutch disk will still have to deposit some material on the flywheel.

standard 500miles.

no... we didnt use brake cleaner... we just took the old clutch off, and put the new one on. surprisingly, the old clutch was also an exedy clutch. had 4 springs on it, so i can only assume it was also an oem clutch.

guess ill go put 500 miles on it now. havent driven up to tonopah in a while.

highly responsive · 08-17-2008, 12:18 PM

Quote:

Originally Posted by ericcastro

Like everyone stated. Its 500 miles.

Last month at the track, my clutch went,
Replaced it right there on the spot in 3 or 4 hours.
Replaced with OEM autozone clutch.
Didnt replace flywheel, didnt even rough with sand paper.
couldnt get the tiny throw out bearing out, but replaced everything else.

Drove down to the bathrooms and back to make sure nothing was binding.

Went right back out with the next run group and was clutch kicking the shit out of that guy ever since.

Its also my DD.

you sir, are badass. props for not only doing your clutch on the fucking track, BUT THEN PROCEEDING TO PUT AN AUTOZONE CLUTCH IN THAT BITCH. i like how you say 500 miles too, and then clutch kick the fuck out of it immediately. posi rep for you, my man.

ericcastro · 08-17-2008, 12:50 PM

^lol.

Well there is the right way,

And the "Its the begining of a 2 day drift event with a comp for $1000" way

**Phlip** · 08-17-2008, 01:53 PM

Quote:

Originally Posted by Silverbullet

I wanted to add:

I know alot of ppl say keep it under a certain RPM (say.. 3500 or 4000
RPM?). Its not so much of what RPM the car is in, but how much load your applying to it. You can be coasting at 6000RPM on a new clutch and it would be perfectly fine as long as your not giving it WOT.

The reason behind this is because you want to prevent the clutch from slipping. There is a coefficient friction force keeping the clutch disk and flywheel together. If your giving it the max torque your motor can produce, that torque could possibly (could possibly, but not toooo likely) over come the coefficient friction of the flywheel and clutch. When that happens you get a bad slip.

Down shifting is ok. It is the same as upshifting in terms of the clutch breaking in.

My thing was basically that you DO NOT need to go beyond that (3.5-4k) to comfortably achieve ANY legal speed, even if merging onto a 70MPH interstate highway... Basically, it was to say "don't beat on it," which has been supported by other posts in this thread.

sumoboi7 · 08-17-2008, 06:27 PM

awesome. ive been taking it easy and everyonce in a while put it to approx half throttle to get to higher rpoms and then coasted down to lower rpms. i was told to do that by one of my frens. i also am making sure it doesnt slip. it still chatters tho. engagement is alot different from stock so im still getting used to it. been driving it as much as possible to break that bitch in so i can start clutch kicking and gettin my tires spinning. i miss the feeling of my turbo spooling and pushing me back into my seat.

08-17-2008, 12:03 PM	#32
bigOdom1 Nissanaholic! Join Date: Nov 2005 Location: Auburn/Birmingham AL Age: 37 Posts: 1,817 Trader Rating: (4) Rides Gallery: bigOdom1 Feedback Score: 4 reviews	some people have great success like that most dont id always break it in __________________ my car domain that good review thread

08-17-2008, 06:27 PM	#37
sumoboi7 Zilvia Member Join Date: Nov 2006 Location: San Francisco Posts: 194 Trader Rating: (0) Feedback Score: 0 reviews	awesome. ive been taking it easy and everyonce in a while put it to approx half throttle to get to higher rpoms and then coasted down to lower rpms. i was told to do that by one of my frens. i also am making sure it doesnt slip. it still chatters tho. engagement is alot different from stock so im still getting used to it. been driving it as much as possible to break that bitch in so i can start clutch kicking and gettin my tires spinning. i miss the feeling of my turbo spooling and pushing me back into my seat. __________________ RIP: black '89 s13 hatch New: white '90 s13 hatch

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