rstewartb18c

I bought a ACT Maxx Xtreme pressure plate and 6 puck spring disc for my built benson sleeved 2.0L type r motor. Right away as i would push the clutch in my idle would go down, and after 2 weeks my thrust washers got completely destroyed and caused lots of damage to the crank and my block.

Has anyone every experienced a problem like this with ACTs maxx xtreme pressure plate?

Rtype16

Have never heard of anything like this from new parts. Some questions though.

Did you buy the entire combo with the flywheel or just the pressure plate and disc?
Did you use it on a stock flywheel?
If on a used flywheel did you resurface the flywheel to the specs for the clutch?
Did you torque down the pressure plate discs to spec?
Are you sure it was installed correctly?

rstewartb18c

Im using the stock flywheel, i did get it resurfaced, everything was torqued down properly and installed correctly.

Was a freshly built motor cp pistons, pauter rods, all acl race bearing. Even my shop was shocked at the damage it caused after only 2 weeks on the motor I have pictures of the damage

dester223

Honestly, I've used the same and similar ACT PP setups on lots of different cars and never had a crank walk issue.

Did you check crank end play when you assembled? If so, how much play did you have?

Dark_Teg

This statement alone tells me something was not right in the motor to begin with. The clutch did not instantly ruin your motor on the first hit. This is of course just my opinion but if your engine was assembled with the correct amount of in and out crank movement regardless of what clutch you used it would not "instantly" trash the thrust bearings enough to effect idle.

IN VTEC

iTrader: (3)

Heavier pressure plates do create more wear on one of the thrust bearings, but it shouldn't bog down the motor when clutching in.

Is there something else that changed with the clutch? Different slave or master cylinder? Different release bearing or fork?

I'm working through the same issue right now with a tilton twin/tilton hrb/omni quicklutch combination. Not sure why mine is doing it yet, but I'll let you know what it is when I find out. Mine does it the instant I start feeling pressure on the clutch and progressively gets worse until I hit the stop. It doesn't kill the motor. Still couldn't get it in gear which tells me that the clutch isn't releasing.

Rtype16

Did you check the step height on the flywheel and go to what ACT recommends? Just cause it was resurfaced does not mean they used the correct step height. Not sure if it changes with that clutch setup.

h2.4

what was your oil pressure at idle. If I pushed my clutch in at idle and it made the car idle down, I would be looking at my oil pressure, and stop driving it before you trash your thrusts, crank and block. I don't think the clutch or flywheel is the problem. Also out of habit, since I have an ACT extreme pressure plate in one of my cars, I leave it in neutral at lights. Just cause I know thats a lot of pressure on the thrusts, idling at the lowest oil pressure.

92redhatch

Something else was wrong. The clutch didn't cause that. Shop probably installed the thrust washers backwards

1992Si

That's my guess.

IN VTEC

iTrader: (3)

Finally got around to pulling the oil pan and looking at the thrust bearings.

They were there and installed with the grooves facing outwards from the main. The clutch-side bearing was starting to show damage; this was only after 5 to 6 moderate an 2 to 3 full depressions of the clutch pedal while the engine was idling. The clutch still doesn't disengage and the wheels keep spinning even at full depression.





The clutch is locking up some how. I really doubt I'm over stroking it, even with the omnipower 21mm quicklutch, because the pedal height is only at 4" from the carpet and the bogging starts as soon as I start putting pressure on the pedal.

I'm pulling the transmission to double check the following:
. clutch plate orientation - I'm pretty sure this is right since I double checked it against tilton specs the last two times I was in there.
. Flywheel bolts - I didn't cut mine down but I could have sworn that I checked to make sure they seated the flywheel.
. Flywheel step height - I think I remember having mine resurfaced (used) and checked the step height after the cut
. Pressure plate releases - this is my last option and if it's locked up I'll need to send it to tilton for reman or buy a new clutch

Maybe I'll have something you can use later on.

LightningTeg

Eh, I've been running an extreme plate on my setup for 4-5 years, put in a a MaXX extreme for more power this year back in March and no issues still.

LS AzZkIkr

How is the pedal feel between the extreme and max extreme?

LightningTeg

Almost not noticable

IN VTEC

iTrader: (3)

Overstroked it. You can see where it hits the ring that secures the diaphram spring and acts as the fulcrum.

I removed the Omnipower 21mm CMC and re-installed the OEM 16mm CMC. Just waiting on a second hand to set the pedal stop height.

Mine - you can see the marks where it hit the retaining ring.


Reconditioned unit from friend's engine: