Author Topic: M47 crank refrence guide. (Read 59702 times)

kowalski · « **on:** January 23, 2007, 10:35:19 PM »

M47 cranks (correct)
E46 320d. 1997-2001. Not the M47N

E39 520d. 1999-2003

E46 318d. 2001-2003/04 Not the M47N

* 1999-2004 Rover 75 CDT

Correct crank
M47D20

* 100 kW (134 hp) and 280 N�m (207 ft�lbf)
o 1999-2001 E46 320d
o 2000-2003 E39 520d
* 85 kW (114 hp) and 265 N�m (195 ft�lbf)
o 1999-2001 E46 318d

Not correct crank
M47TUD20

* 85 kW (114 hp) and 280 N�m (207 ft�lbf)
o 2001-2005 E46 318d
* 110 kW (148 hp) and 330 N�m (243 ft�lbf)
o 2001-2005 E46 320d
o E83 X3 2.0d
* 2004-2005 Rover 75 CDTi

Not correct crank
M47TU2D20

* 90 kW (121 hp) and 280 N�m (207 ft�lbf)
o E87 118d
o E90/E91 318d
* 120 kW (161 hp) and 340 N�m (251 ft�lbf)
o E60/E61 520d
o E87 120d
o E90/E91 320d

D. Clay · « **Reply #1 on:** January 23, 2007, 11:38:20 PM »

Are all of these Euro only models?

kowalski · « **Reply #2 on:** January 23, 2007, 11:50:37 PM »

to my knowledge yes. there is probably some grey market ones around here though?

Note the rover, not a bmw, but has the bmw engine, and right crank.

dhirsch · « **Reply #3 on:** October 04, 2007, 11:27:44 AM »

Does anyone know the BMW part number(s) for the crank that will work with M42's?

kiulu · « **Reply #4 on:** October 04, 2007, 04:13:35 PM »

Why the m47n crank isn't correct?

christophbmw · « **Reply #5 on:** October 04, 2007, 08:32:54 PM »

i dont know if you guys know this but Metric Mechanic has a "kit" M47 crank (at88mm stroke) for like $1200. they machine it and everything for you, all you have to do is install it.

by the way, i love this reference guide, very helpful.

kowalski · « **Reply #6 on:** October 04, 2007, 08:52:25 PM »

you can use the m47N crank you just need anotehr piece machined. its also a little longer stroke.

You can get the crank for cheaper then 1,200 else where but yeah, you can go that route as its an easy way to go.

christophbmw · « **Reply #7 on:** October 04, 2007, 09:06:52 PM »

Quote from: kowalski;35027

you can use the m47N crank you just need anotehr piece machined. its also a little longer stroke.

You can get the crank for cheaper then 1,200 else where but yeah, you can go that route as its an easy way to go.

the cheapest i have found in the states was like $780 (plus you would have to get it machined). correct me if im wrong, please tell me if there is somewhere where you can get them cheaper, because i need one eventually when i do my build.

kowalski · « **Reply #8 on:** October 05, 2007, 01:24:14 AM »

i found mine in Austria. I have an extra 1...

kiulu · « **Reply #9 on:** October 05, 2007, 05:39:30 AM »

I bought my m47n crank from here Finland 450 euros.
The crank is from 2004 320d

christophbmw · « **Reply #10 on:** October 05, 2007, 11:34:19 AM »

Quote from: kowalski;35050

i found mine in Austria. I have an extra 1...

are you selling it?

kowalski · « **Reply #11 on:** October 05, 2007, 12:24:56 PM »

ispierrot · « **Reply #12 on:** October 13, 2007, 03:57:39 PM »

is it correct ?
http://bmwfans.info/original/E39/Lim/520d-M47/ECE/L/M/2001/02/mg-11/ill-11_2227/

pungky29 · « **Reply #13 on:** February 28, 2008, 01:29:37 AM »

Quote from: kowalski;18105

M47 cranks (correct)
E46 320d. 1997-2001. Not the M47N

E39 520d. 1999-2003

E46 318d. 2001-2003/04 Not the M47N

* 1999-2004 Rover 75 CDT

Correct crank
M47D20

* 100 kW (134 hp) and 280 N�m (207 ft�lbf)
o 1999-2001 E46 320d
o 2000-2003 E39 520d
* 85 kW (114 hp) and 265 N�m (195 ft�lbf)
o 1999-2001 E46 318d

Not correct crank
M47TUD20

* 85 kW (114 hp) and 280 N�m (207 ft�lbf)
o 2001-2005 E46 318d
* 110 kW (148 hp) and 330 N�m (243 ft�lbf)
o 2001-2005 E46 320d
o E83 X3 2.0d
* 2004-2005 Rover 75 CDTi

Not correct crank
M47TU2D20

* 90 kW (121 hp) and 280 N�m (207 ft�lbf)
o E87 118d
o E90/E91 318d
* 120 kW (161 hp) and 340 N�m (251 ft�lbf)
o E60/E61 520d
o E87 120d
o E90/E91 320d

Thanks for the reference mate!

BTW, on BMW TIS 2007, I found out that E46 318d M47N has 90mm stroke without flywheel balancer and looked similar to E46 318d M47 crankshaft with 88mm stroke
The price of both crankshafts are similar, according to this site:

http://bmwfans.info/original/E46/Lim/318d-M47N/ECE/R/N/2004/10/mg-11/ill-11_3513/

If it can be used with E36 S50 B30 US M3 piston which has 86mm diameter and 32.8mm compression distance plus 135mm conrod length, the resulting displacement is 2,091cc (86mm x 90mm) with 1,5 conrod ratio. Off course you need to enlarge the bore to 86mm (2mm larger for m42 or 1mm larger for M44)
The total deck height will 211.80mm or it will sits 0.35mm lower than M42/M44 standard deck height.

What do you think?

D. Clay · « **Reply #14 on:** February 28, 2008, 02:09:54 AM »

In the link above, thrust bearings are shown to be on the block and also on main bearing cap. The specs offer different sized journals and a second measurement which is for different sized thrust measurements. The M42 only has provision for a thrust bearing on the upper half of the journal. The main bearing cap is like all of the others. As a result, this is a weak spot on the M42. Is the main bearing cap modified for the diesel bearing or is the crank just bolted as is?