Engine replacement... failing SMG test

[bmwfnatic]

Before dropping the trans you could do a test. I've never done this before but I suspect it would work.

1. Remove the clutch slave.
2. Rig up some kind of jig that would act like the clutch fork. A large c clamp with an old clutch fork might work?
3. Run the clutch bleed procedure and make sure the plunger actually moves.

Important: do not run the clutch bleed with the plunger in free air or it will pop all the way out of the clutch slave and it will not be repairable.


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The 'important' note is actually very important, don't ask me how I know...

[eacmen]

Appreciate all of the help!
im on bleed 73 and i think im going to call it, on the INPA.
im thinking i should drop the tranny and try again, but it shifts smoothly otherwise. Hmmm

Before dropping the trans you could do a test. I've never done this before but I suspect it would work.

1. Remove the clutch slave.
2. Rig up some kind of jig that would act like the clutch fork. A large c clamp with an old clutch fork might work?
3. Run the clutch bleed procedure and make sure the plunger actually moves.

Important: do not run the clutch bleed with the plunger in free air or it will pop all the way out of the clutch slave and it will not be repairable.


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[x Spades x]

I'm out of ideas. My first thought is that the PLCD sensor in the clutch slave isn't working. But since its new maybe you got a bad unit?

Maybe a wiring issue?


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Appreciate all of the help!
im on bleed 73 and i think im going to call it, on the INPA.
im thinking i should drop the tranny and try again, but it shifts smoothly otherwise. Hmmm

[eacmen]

INPA

I'm out of ideas. My first thought is that the PLCD sensor in the clutch slave isn't working. But since its new maybe you got a bad unit?

Maybe a wiring issue?


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[x Spades x]

Are you using INPA or a different tool to do the SMG adaptations?


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INPA

[eacmen]

Yeah, i heard everything moving around... sound normal (as in likeit usually sounds over the years). When i shift manually, everything sounds quite. Hmm... the actuator passes every time.

Are you using INPA or a different tool to do the SMG adaptations?


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[x Spades x]

Not sure.

When I try to do the clutch adaptation I can hear the fork moving the pressure plate.

But doing the clutch bleed you just hear the hydraulic cylinder pumping. Its basically the same as someone continuously pumping the clutch pedal on a manual. Do you hear anything when trying you do the clutch bleed?


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Yeah, i heard everything moving around... sound normal (as in likeit usually sounds over the years). When i shift manually, everything sounds quite. Hmm... the actuator passes every time.

[eacmen]

well how would i know, any way to tell?

Not sure.

When I try to do the clutch adaptation I can hear the fork moving the pressure plate.

But doing the clutch bleed you just hear the hydraulic cylinder pumping. Its basically the same as someone continuously pumping the clutch pedal on a manual. Do you hear anything when trying you do the clutch bleed?


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[x Spades x]

Just because you can shift gears doesnt mean the clutch and clutch slave is installed correctly.


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well how would i know, any way to tell?

[eacmen]

yeah, slave is installed correctly. I can manually shift from R-2 and shift through all gears using INPA

Just because you can shift gears doesnt mean the clutch and clutch slave is installed correctly.


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[x Spades x]

Id start looking at the solenoids and such on the smg pump.

Youre sure the clutch slave is installed correctly with the plunger in the fork?


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yeah, slave is installed correctly. I can manually shift from R-2 and shift through all gears using INPA

[eacmen]

Another update... I'm officially on SMG bleed 56 and still failing the slave cyl clutch/hard line bleed (test 2).

Again, new ckutch, spring, slave cyl. Any other suggestions?

Id start looking at the solenoids and such on the smg pump.

Youre sure the clutch slave is installed correctly with the plunger in the fork?


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[x Spades x]

Another update... I'm officially on SMG bleed 56 and still failing the slave cyl clutch/hard line bleed (test 2).

Again, new ckutch, spring, slave cyl. Any other suggestions?

[eacmen]

Just wanted to check in... how mant tines did you gues try bleeding the slave/clutch (test 2), before it finally passed?

Just trying to gauge the number of attempts.

i've never had your issue before but i've seen people needing to do it 20 times.


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[x Spades x]

Just wanted to check in... how mant tines did you gues try bleeding the slave/clutch (test 2), before it finally passed?

Just trying to gauge the number of attempts.