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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E36 (1991 - 1999)

E36 (1991 - 1999)
The E36 chassis 3-Series BMW was a huge hit among driving enthusiasts from the first moment the car hit the pavement. The E36 won numerous awards over the years it was produced and is still a favorite of many BMW enthusiasts to this day! -- View the E36 Wiki

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  #1  
Old 05-31-2012, 04:20 PM
Dakota_leWarne Dakota_leWarne is offline
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bad master cylinder

So, i got my motive power bleeder today, filled it with a quart of fluid, hooked it up and pumped to 15psi then opened the nipple, it seemed to bleed just fine. once the bubbles stopped, i pulled it all off and took it for a drive, the clutch engaged right off the floor and still could not shift into second and sometimes not third. so i tried it again, this time pumping to 20psi. i opened the nipple and got a little fluid and then large amounts of air spitting out, almost as if i was just pumping air through the system.

i also noticed that if i push the peddle with the bleeder hooked up i get a MUCH nicer clutch feel. ( after the first bleed )

do i need a new master? am i bleeding it improperly? any opinions help.


thanks to everyone who as given me such great information throughout this whole process!
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  #2  
Old 05-31-2012, 04:30 PM
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drivinfaster drivinfaster is offline
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what you could do is pinch off the hose with a proper pinch off tool (or use rubber hose over needle nose locking pliers -vice grips- to not cut into the insulation) and then hit the pedal. if it is very firm but bleeds down, then you will need a clutch mc.



this also works with the regular brake master cylinder, but requires additional pinch off tools.




df
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  #3  
Old 05-31-2012, 10:30 PM
Dakota_leWarne Dakota_leWarne is offline
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ok so pinch the tube from the master to the slave? what would a good slave feel like?
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  #4  
Old 06-01-2012, 12:06 AM
Dakota_leWarne Dakota_leWarne is offline
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so after work today i decided to bleed it again, making sure to keep the master full, i got (from what i can tell) all the air out. Yet still, no shifting into second, when i shift from first to second it only grinds a little ( less if i pump the peddle for a bit ) but downshifting from 3rd or 4th to second will not go in.


any ideas?
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Old 06-01-2012, 05:06 AM
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you would squeeze the rubber hose in the system. this stops any fluid from moving the slave piston out, which *should* result in a rock hard pedal.

if the pedal bleeds down, then the master seals are bypassing.


this is the same for the brake master cylinder as well, but you'd have to pinch off all 4 brake hoses.

the rubber hoses, not the steel lines, just so's ya kno....k??


now, if the clutch pedal passes muster, and you are *still* having shifting issues, then you are looking at either the slave, clutch fork, pressure plate, or something internal in the trans, like blocking rings and synchros that are worn. the last one should result in metalic debris in the fluid, so you could try to take a sample.

you should also double check the fluid level as well, as a low fluid level could cause some issues.



df
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Old 06-01-2012, 09:36 AM
Dakota_leWarne Dakota_leWarne is offline
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ok thanks,after putting in the new TOB and pivot pin i changed the fluid ( the clutch that came with the donor engine was in good shape still) i did not notice that the fluid was really bad but i put in "Valvoline maxlife mercon dextron atf" could that be causing issues? maybe so synchromesh would make a difference?
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Old 06-01-2012, 09:42 AM
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You say "Mercron dextron" I was of the understanding that the two terms were mutually exclusive. Can anyone chime in?
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Old 06-01-2012, 01:41 PM
Dakota_leWarne Dakota_leWarne is offline
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http://www.autozone.com/autozone/acc...er=318569_0_0_


i picked up some syncromesh today and will put it in after i fix my coil problem..


(for anyone who does not know.. hold control and click the link)
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  #9  
Old 06-01-2012, 07:28 PM
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Quote:
Originally Posted by jonesin View Post
You say "Mercron dextron" I was of the understanding that the two terms were mutually exclusive. Can anyone chime in?
yes. dextron mercon is the same. at least until you get to mercon v. that's not interchangeable with dextron.



df
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  #10  
Old 06-01-2012, 08:25 PM
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Thanks for the clarification df. I did some research on my own, but it all ended up as either hearsay, or just talking out of the anal passage.
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  #11  
Old 06-02-2012, 12:00 PM
Dakota_leWarne Dakota_leWarne is offline
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ok so i clamped off the hose, the peddle was very stiff but i was able to push it to the floor, after pushing it to the floor the first time it was not quite so stiff and after the second time the vice grips popped off the hose ( despite the zip tie holding them closed in addition to them being locking pliers)

that means the master is probably good right?
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  #12  
Old 06-02-2012, 01:46 PM
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depends on how much effort you were putting into it....

this was a test designed to check the pedal with *normal* pressure. you're not trying to leg press a mountain here skippy...

now as for the locking pliers, were they needle nose, or curved jaw?? it makes a difference.

and i hope that you used some rubber hose to protect the insulation.

if in doubt, just get the 'proper' hose pinch tool and retest.

these can be squeezed tighter to prevent being pushed off.



df
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  #13  
Old 06-02-2012, 02:00 PM
Dakota_leWarne Dakota_leWarne is offline
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yea see they had a pair of those at harborfreight but were three times as much


i went with a pair of these and yes used pieces of rubber to protect the hose.

http://www.harborfreight.com/6-inch-...ers-39534.html

i realise i probably should have payed a bit more for the other pliers but in reality dont see it being the problem and will more then likely be replacing the trans.
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Old 06-02-2012, 04:39 PM
RhymeGrime RhymeGrime is offline
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Are we certain the slave isn't bad?
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  #15  
Old 06-02-2012, 04:59 PM
Dakota_leWarne Dakota_leWarne is offline
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slave is new :P
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  #16  
Old 06-03-2012, 06:06 PM
Dakota_leWarne Dakota_leWarne is offline
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Will a 1997 BMW 528i Transmission fit in an e36 with an m44?
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Last edited by Dakota_leWarne; 06-03-2012 at 06:13 PM.
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  #17  
Old 06-03-2012, 06:22 PM
Dakota_leWarne Dakota_leWarne is offline
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will a transmission outa a 94 318is bolt right up?
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Old 06-03-2012, 07:23 PM
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Why the transmission questions? Do you think yours is bad?

You haven't specified if the replacements you've listed are 5-speeds or automatics I would assume 5-speeds. Yes on the '94 318 tranny, probably not on the '97 528 transmission.
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  #19  
Old 06-04-2012, 12:05 AM
Dakota_leWarne Dakota_leWarne is offline
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yea the transmission grinds way more when downshifting rather then up shifting, which is a sign of synchros going out. the rest of the car was abused pretty bad so someone not knowing how to shift doesnt make me think twice.


the 528i has a similar looking engine to the 328is, in 97 did they maybe use the same engine? if that were the case would the trans bolt up? i feel like i could probably shorten or extend the driveshaft if i needed to.
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Old 06-04-2012, 12:51 AM
Dakota_leWarne Dakota_leWarne is offline
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ok so i looked up a clutch kit for the bmw 528i transmission has a


528i
Spline count of 8 1/8''
Inner spline diameter 9 1/2''


318is
spline count of 8 1/8''
Inner spline diameter 8 1/2


does that alone mean it wont fit?



for thouse of you who have not figured it out.. i fould a cheep 528i trans with 80k miles and i dont even have to pull it
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Old 06-04-2012, 11:36 AM
Dakota_leWarne Dakota_leWarne is offline
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will the 325i trans need any modification to get it in? same clutch, sifter, driveshaft?
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  #22  
Old 06-04-2012, 02:03 PM
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hornhospital hornhospital is offline
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Driveshaft will be different length, don't know about the clutch.Shifter will be the same.
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Old 06-04-2012, 04:51 PM
Dakota_leWarne Dakota_leWarne is offline
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i understand that the length of the driveshaft will be different in the other car but i need to know if i can use the old one from my car with the new trans
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Old 06-04-2012, 08:00 PM
Dakota_leWarne Dakota_leWarne is offline
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the video shows what my problem is, clutch is on the floor any time i am shifting, the camera mount is the squeaking noise and there are parts in the back seat that shift around.


it grinds from 1st to second, then when letting the clutch out in third, then goes into third fine, then ginds when trying to go into second through a turn so i put it in third fine, then fourth, then back to third for the next turn, then i come to a stop, put it in second and pull away, then shift into second and when i let the clutch out it grinds, then i leave it in nutural and back into third to pull into the driveway.


( file was too large... any idea how to upload a file that is to large for attachments)
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Old 06-04-2012, 09:07 PM
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Quote:
Originally Posted by Dakota_leWarne View Post

( file was too large... any idea how to upload a file that is to large for attachments)
Youtube.
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