Messages

1

WTB/WTT / DME/ECU for e30 M42

« on: November 20, 2010, 10:34:31 PM »

OK, I found one from the recent Seattle Cl post in the for sale forum
. I think I have worked out my electrical problems. If not I will post again.

2

WTB/WTT / DME/ECU for e30 M42

« on: November 20, 2010, 03:11:28 PM »

I am in the Seattle area.

I want to buy a working ecu with Bosch PN 0261200175. This is the ECU for a 91 318is. I would prefer an unopened stock ECU but I would buy a chipped ECU as well.

3

Engine + Driveline / Crank Seal

« on: August 19, 2010, 12:14:03 PM »

I know this isn't the thread topic, but I would disagree about having the timing cover shaved as well.  It is a good idea, but I wouldn't put it at the level of *need*.  Do it if you can, but if you can't I don't think it will be that big of a deal.  

If you look at the design of the timing cover and the install procedure, it seems like BMW already anticipated this situation.  1) The slotted the mounting holes in the timing cover so that it can slide up and down relative to the head.  2) they used a rubber gasket on the valve cover to take up some of the step.  3) they have a specification for min head height.  

Just make sure that when you install the head, you tap the timing cover down to flush before you tighten up the bolts on the cover.  

Oh yeah, and the disclaimer.  I may be wrong.  I am no expert, this is just the way it would appear to me with the information that I have available.  I am doing my first rebuild.  I didn't have the machine shop plane the parts together and I am not concerned.

4

WTB/WTT / Need: 325i flywheel for M20 swap

« on: August 17, 2010, 08:45:42 PM »

Found it!

5

Engine + Driveline / Identifying M20 single vs twin mass flywheel for swap

« on: August 09, 2010, 10:58:18 PM »

Sorry to Bump, but I wanted to give an update on the flywheel comparisons.  I took the mystery flywheel into the inspection room and got pretty accurate dimensions off of it.  I have a nice drawing that lays out most of the important ones, but I have to go back and double check a few.  Once I get the correct 325i flywheel I will be able to post the comparisons.  

There are a few 528i sitting in a junk yard near by.  I am going to try my luck and hope that one of them has a flywheel still.

6

WTB/WTT / Need: 325i flywheel for M20 swap

« on: August 09, 2010, 02:03:08 PM »

Hey all,

I am in Seattle, WA and looking for a suitable flywheel for the swap.  I'm not too picky.  I will take any single mass flywheel for an M20 (325i, 325e, 528e, ...) I really want the 18 lbs flywheel that everyone talks about, but I can make the 24 lbs one work, or even a lightened one.  

Thanks

7

Engine + Driveline / Identifying M20 single vs twin mass flywheel for swap

« on: July 29, 2010, 03:23:56 PM »

Oh... wait, you are right about the crank position sensor.  I remember pulling a sensor off of the block, but I can't picture where it actually lines up on the driveline.  I saw a sensor, I saw a reference mark, so I connected the two in my head. My bad. Sorry for the assumption.

8

Engine + Driveline / Identifying M20 single vs twin mass flywheel for swap

« on: July 28, 2010, 05:16:43 PM »

Thanks again for all the great info.  I am going to throw chips tonight so we will see what happens.  I have no idea what I am getting myself into, but here is the plan in case anyone cares.  

I am going to grab the bolt pattern and center hole dims to make a lathe fixture.  (may skip this and just chuck it up directly, but I really don't want to mess up the "bearing" surface on the flywheel.  I plan to pull as much weight out of the engine side as I can.  Once I am satisfied, I am going to attempt to swap the ring gears so I don't need to mess with the starter pinion ever.  I am thinking blow torch and bearing press...

I may also try to remove the clutch alignment pins and do a "proper" resurfacing. I actually have no idea how to resurface a flywheel, but hey, what could go wrong.  If I don't get the pins off then I am just going to pull a little material off of the friction surface.  Has anyone done this before and have surface finish suggestions?

mmmm, I guess that is more than I will have time for tonight.  I am also a little concerned about the crank position trigger.  I noticed that it doesn't line up between the M42 and the M20.  Oh well?

I know most of this has all ready been discussed on the stickied thread, but I still have a few unanswered questions.  I will post again if I make any significant progress.  (otherwise I probably had an accident with a 450 degree flywheel...)

9

Engine + Driveline / Identifying M20 single vs twin mass flywheel for swap

« on: July 27, 2010, 05:31:25 PM »

I am pretty sure it isn't an M42 flywheel.  It looks damn near identical to any of the pics I have seen for the M20 flywheels.  It is just the weight that is throwing me off.  

I have all the pictures ready to post, but I am having trouble uploading them.  Not sure if I need authorization from an admin or not.  I will go ask around on the general discussion board or the site specific board.  Hopefully I will have pics up soon.  Thanks again for all the help and info.

Here are the images in my album.  Hope it works

10

Engine + Driveline / Identifying M20 single vs twin mass flywheel for swap

« on: July 26, 2010, 10:36:05 PM »

Thanks DesktopDave

I did a little more research on which flywheels are available one which e30's and I am getting close to sorting it all out.  I found two sites that confirm the 18lbs weight for the 325i flywheel.  

bmwman91 shows the flywheel on the scale at e30tuner.com (http://bmw.e30tuner.com/my318is_pic_rebuild6.php).  Pretty convincing

Then over on revlimited another owner posts measured weights for 325i and 325e flywheels.  http://r3vlimited.com/board/showthread.php?p=397397 Again, very convincing.  

My scale shows 23.8 lbs for the flywheel in question.  Pictures are on the way, but the forum won't accept my pics.  

As for pulling dims off of your flywheel, that would be awesome, but you should wait until I get off my lazy butt and inspect both of my setups.  I just realized that I have two full clutch assemblies (one M42, and one M20 if this is a stock flywheel). Once I have everything written up I will let you know.  My plan is to have rough dimensioned drawings, that way we can be sure we are talking about the same dimensions.  

On a side note, I like your detail about the dual mass flywheel.  My experience (admittedly not much) leads me to believe that harmonic balancers and dual mass flywheels serve slightly different purposes.  The harmonic balancer is used to balance the first and second vibrational modes which are inherent in the engine.  These are partly from design, and partly from manufacturing tolerances.  The dual mass flywheel however is a low pass filter (checking, checking.... thinking.... uh, yeah, low pass) which would filter out any high frequency vibrations.  So I guess this would in fact filter out vibrations from the first and second modes, but I was thinking that it had more to do with the fact that you have so few cylinders firing and less even power application than, say, a 6 or 8 cylinder. But hey, the eta appears to have a dual mass flywheel too, so that blows my theory out of the water.  I had no idea about the automatics, but that is awesome (well, other than the fact that you are stuck with an auto tranny) :-) Anyway, I am WAY off topic.   I just hope I don't sound like a pompous engineer straight out of school... just sharing what I have pieced together with my limited tools.

Thanks for the info and I will let you know what happens with the inspection dims.

11

Engine + Driveline / Identifying M20 single vs twin mass flywheel for swap

« on: July 26, 2010, 04:55:32 PM »

o_O shredded marbles??!?!  I don't want that.  Thanks for the info.  I will try to remember to upload a few pics once I get home.  

Is anyone else interested in having inspection quality dims off of this flywheel? I might talk to the guys in inspection to see if they will let me put a mic on it.  It seems like it could help finally answer some of the questions about spacers, 323 TO bearing, ring gear engagement, ...

I would need to pull dims for a full clutch assembly for the M42 and the M20, but you never know what will turn up. :-D

12

Engine + Driveline / Identifying M20 single vs twin mass flywheel for swap

« on: July 26, 2010, 02:28:09 PM »

Sorry, my post is a little misleading.  I know that I have the heavier twin mass flywheel for the m20.  I know it is an M20 flywheel because I recognize it, and weighed it.  

My two last questions are the most important.  I am looking for a PN for the lighter flywheel so that I can eliminate any confusion for the supplier.  Also, I am interested to know if it is common for either a dual mass or twin mass flywheel to be manufactured out of a single piece of steel.  Anyone I have talked to so far says that dual mass is ALWAYS two pieces joined together.  This would hurt my case in returning the flywheel because it would mean that their advertised "Single Mass Flywheel" was actually more or less correct.  Meh, if it comes down to it I may be able to machine it down to the same dims as a true single mass. I'm not sure how I would track down accurate dims for a flywheel that I don't have... :-)

Thanks for the response though.  I remember seeing your posts around here.  You have provided a lot of good info as I have done research for my projects.  Did you do the swap too? Just curious.  Thanks again.

13

Engine + Driveline / Identifying M20 single vs twin mass flywheel for swap

« on: July 26, 2010, 11:10:51 AM »

Hey all,

I purchased an M20 flywheel for the infamous flywheel swap.  The part came in and it appears to be a "twin mass" flywheel according to realoem.  I know realoem can be wrong, but it weights 24lbs.  

I am positive that this is not the single mass flywheel that I was looking for because several sources have quoted this at about 18lbs stock (bmwman91, tuner motorsports, ...).  I am looking for some semantics help and general clarification in case i run into trouble returning the part.  

First of all, does anyone have a PN for the true single mass flywheel? I have PN 11221706573, but can't find a PN for the 18lbs flywheel.

Second, can anyone help clarify if there is a difference between the term "twin mass" and "dual mass"?  I would have assumed that they mean the same thing, but my "twin mass" flywheel is a single piece of steel.  The supplier said that all dual mass flywheels have two masses connected together with a "dampner" (yes, he said dampNer and I laughed) so he is going to try to tell my that my 24lbs beast is a single mass flywheel just as advertised.  

anyway, I am excited about this swap.  Just looking for a little help.  

Thanks