W123/126 Engine+Transmission Differences

STD Tuning Engine W123/126 Engine+Transmission Differences

W123/126 Engine+Transmission Differences

W123/126 Engine+Transmission Differences

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300SD81

GT2559V

187

08-06-2011, 11:59 PM #1

I'm in the process of swapping an engine and transmission from a W123 300D into a W126 300SD. What are all the parts that will need to be swapped over? So far I've found:

Engine mount arms
Transmission tailshaft
Manifolds and turbo (new engine is cali)
Oil filter housing (do I need to swap the whole thing, or just the back plate?)

Both are out of the car right now. What am I missing? I'd like to get this thing running again by monday. The transmission main pump died on me...

This post was last modified: 08-07-2011, 12:02 AM by 300SD81.

Ich liebe meine Autos!

1981 Mercedes-Benz 300SD | 156K Miles | 2nd Owner | EGR Disabled [Removal Pending] | ALDA Removed | Straight Pipes | GT2256V??? | Laser Interceptor | Engine swap over summer, hopefully with GT2256V attached...

1981 Mercedes-Benz 300SD | Odo Stopped at 160K (at least 50K more) | EGR Disabled | ALDA All The Way Out | Straight pipes | FM-870 Remote Start Alarm System | B100 Biodiesel | AC Fixed x2 | Trunk crushed in Sad

Sad

| Retired to garage.

Excessive speeding? It ain't excessive till I redline!

300SD81

08-06-2011, 11:59 PM #1

I'm in the process of swapping an engine and transmission from a W123 300D into a W126 300SD. What are all the parts that will need to be swapped over? So far I've found:

Engine mount arms
Transmission tailshaft
Manifolds and turbo (new engine is cali)
Oil filter housing (do I need to swap the whole thing, or just the back plate?)

Both are out of the car right now. What am I missing? I'd like to get this thing running again by monday. The transmission main pump died on me...

Ich liebe meine Autos!

1981 Mercedes-Benz 300SD | 156K Miles | 2nd Owner | EGR Disabled [Removal Pending] | ALDA Removed | Straight Pipes | GT2256V??? | Laser Interceptor | Engine swap over summer, hopefully with GT2256V attached...

1981 Mercedes-Benz 300SD | Odo Stopped at 160K (at least 50K more) | EGR Disabled | ALDA All The Way Out | Straight pipes | FM-870 Remote Start Alarm System | B100 Biodiesel | AC Fixed x2 | Trunk crushed in Sad

Sad

| Retired to garage.

Excessive speeding? It ain't excessive till I redline!

300SD81

GT2559V

187

08-07-2011, 02:52 PM #2

Turns out my spare trans is a 722.4... Never really looked at it since it came with an engine I bought and I never thought I'd need it. Just going to drop everything in and deal with the electrical problems later. I know its a weaker trans, but I'm sure it'll last for a little while at least. Don't have time to source another transmission and I need my car.

This post was last modified: 08-07-2011, 02:54 PM by 300SD81.

Ich liebe meine Autos!

1981 Mercedes-Benz 300SD | 156K Miles | 2nd Owner | EGR Disabled [Removal Pending] | ALDA Removed | Straight Pipes | GT2256V??? | Laser Interceptor | Engine swap over summer, hopefully with GT2256V attached...

1981 Mercedes-Benz 300SD | Odo Stopped at 160K (at least 50K more) | EGR Disabled | ALDA All The Way Out | Straight pipes | FM-870 Remote Start Alarm System | B100 Biodiesel | AC Fixed x2 | Trunk crushed in Sad

Sad

| Retired to garage.

Excessive speeding? It ain't excessive till I redline!

300SD81

08-07-2011, 02:52 PM #2

Turns out my spare trans is a 722.4... Never really looked at it since it came with an engine I bought and I never thought I'd need it. Just going to drop everything in and deal with the electrical problems later. I know its a weaker trans, but I'm sure it'll last for a little while at least. Don't have time to source another transmission and I need my car.

Ich liebe meine Autos!

1981 Mercedes-Benz 300SD | 156K Miles | 2nd Owner | EGR Disabled [Removal Pending] | ALDA Removed | Straight Pipes | GT2256V??? | Laser Interceptor | Engine swap over summer, hopefully with GT2256V attached...

1981 Mercedes-Benz 300SD | Odo Stopped at 160K (at least 50K more) | EGR Disabled | ALDA All The Way Out | Straight pipes | FM-870 Remote Start Alarm System | B100 Biodiesel | AC Fixed x2 | Trunk crushed in Sad

Sad

| Retired to garage.

Excessive speeding? It ain't excessive till I redline!

300D50

Graphite Moderator, ala RBMK

775

08-07-2011, 04:26 PM #3

Just the back section of the filter housing iirc.

1990 Power Ram 50 V6 SOHC 24V 6g72

I can be wrong, don't take everything I say as verbatim, please fact-check first.
My posts are my personal opinions and thoughts, unless otherwise noted.

300D50

08-07-2011, 04:26 PM #3

Just the back section of the filter housing iirc.

1990 Power Ram 50 V6 SOHC 24V 6g72

I can be wrong, don't take everything I say as verbatim, please fact-check first.
My posts are my personal opinions and thoughts, unless otherwise noted.

Hercules

GT2559V

219

08-07-2011, 04:52 PM #4

Possible upper pan,turbo drain.

Hercules

08-07-2011, 04:52 PM #4

Possible upper pan,turbo drain.

aaa

GT2256V

913

08-07-2011, 06:19 PM #5

(08-07-2011, 04:52 PM)Hercules Possible upper pan,turbo drain.

Haven't had hiccups related to those.

aaa

08-07-2011, 06:19 PM #5

(08-07-2011, 04:52 PM)Hercules Possible upper pan,turbo drain.

Haven't had hiccups related to those.

MB TECH

GT2559V

188

08-07-2011, 06:35 PM #6

does the 126 have SLS rear suspension, if it does the cylinder head will need to be swapped over for the suspension hydraulic pump.

1979 450SEL 6.9 - stock

1960 220SE
111 tube chassis car/undergoing full restoration. Body work in progress. Merging with a 1996 S500 (119 engine, 722.6 trans, and both subframes)

2005 S55 AMG - stock

1999 SLK230 Kompressor - stock

2006 SLK55 AMG - stock

MB TECH

08-07-2011, 06:35 PM #6

does the 126 have SLS rear suspension, if it does the cylinder head will need to be swapped over for the suspension hydraulic pump.

1979 450SEL 6.9 - stock

1960 220SE
111 tube chassis car/undergoing full restoration. Body work in progress. Merging with a 1996 S500 (119 engine, 722.6 trans, and both subframes)

2005 S55 AMG - stock

1999 SLK230 Kompressor - stock

2006 SLK55 AMG - stock

300SD81

GT2559V

187

08-07-2011, 06:52 PM #7

The back plate of the oil filter housing is different, so I'm gonna have to swap the whole thing... Anyone know where I can get a gasket ASAP? Autozone and Advance Auto don't have it.

Turbo drain looks fine, the new engine is missing the oil separator drain, but I had a draft tube anyways...

I'm going to end up doing this again in a couple months, since I'm sticking a 722.4 in there now, anyone have a spare 722.3 for sale? Or maybe this is the perfect excuse to finally do the 722.6 swap I've been wanting to...

Ich liebe meine Autos!

1981 Mercedes-Benz 300SD | 156K Miles | 2nd Owner | EGR Disabled [Removal Pending] | ALDA Removed | Straight Pipes | GT2256V??? | Laser Interceptor | Engine swap over summer, hopefully with GT2256V attached...

1981 Mercedes-Benz 300SD | Odo Stopped at 160K (at least 50K more) | EGR Disabled | ALDA All The Way Out | Straight pipes | FM-870 Remote Start Alarm System | B100 Biodiesel | AC Fixed x2 | Trunk crushed in Sad

Sad

| Retired to garage.

Excessive speeding? It ain't excessive till I redline!

300SD81

08-07-2011, 06:52 PM #7

The back plate of the oil filter housing is different, so I'm gonna have to swap the whole thing... Anyone know where I can get a gasket ASAP? Autozone and Advance Auto don't have it.

Turbo drain looks fine, the new engine is missing the oil separator drain, but I had a draft tube anyways...

I'm going to end up doing this again in a couple months, since I'm sticking a 722.4 in there now, anyone have a spare 722.3 for sale? Or maybe this is the perfect excuse to finally do the 722.6 swap I've been wanting to...

Ich liebe meine Autos!

1981 Mercedes-Benz 300SD | 156K Miles | 2nd Owner | EGR Disabled [Removal Pending] | ALDA Removed | Straight Pipes | GT2256V??? | Laser Interceptor | Engine swap over summer, hopefully with GT2256V attached...

1981 Mercedes-Benz 300SD | Odo Stopped at 160K (at least 50K more) | EGR Disabled | ALDA All The Way Out | Straight pipes | FM-870 Remote Start Alarm System | B100 Biodiesel | AC Fixed x2 | Trunk crushed in Sad

Sad

| Retired to garage.

Excessive speeding? It ain't excessive till I redline!

winmutt

bitbanger

3,468

08-08-2011, 03:53 PM #8

If you are at school, no. If you are intown, rusty @ buymbparts.biz.

1987 300D Sturmmachine
1991 300D Nearly Perfect
1985 300D Weekend/Camping/Dog car
1974 L508D Motoroam Monarch "NightMare"
OBK #42

winmutt

08-08-2011, 03:53 PM #8

If you are at school, no. If you are intown, rusty @ buymbparts.biz.

1987 300D Sturmmachine
1991 300D Nearly Perfect
1985 300D Weekend/Camping/Dog car
1974 L508D Motoroam Monarch "NightMare"
OBK #42

Captain America

Boostin' & Roostin'

2,221

08-09-2011, 12:31 AM #9

Tail housings wont swap anyway.... I tried it

1982 300D Turbo ... 3,6xxlbs, No fan, No AC, Hood Stack, No ALDA, No rear bumper and stuffed front, A/W Intercooled, Injectors by Greezer and HUGE Pre-Chambers with help from OM616 & Simpler=Better, Fuel Cranked up, 60 Trim Compressor wheel, EGT, EMP, Boost 50" Rigid Radius bar on roof Aux tank for a total of 48 Gal Of Diesel! Odyssey PC-1750 Battery in trunk, 27"x8.5"/R14 Maxxis BigHorn Mud Terrains, In June '14 issue of Off Road Mag

AX15 Jeep Trans swap in progress....

Captain America

08-09-2011, 12:31 AM #9

Tail housings wont swap anyway.... I tried it

1982 300D Turbo ... 3,6xxlbs, No fan, No AC, Hood Stack, No ALDA, No rear bumper and stuffed front, A/W Intercooled, Injectors by Greezer and HUGE Pre-Chambers with help from OM616 & Simpler=Better, Fuel Cranked up, 60 Trim Compressor wheel, EGT, EMP, Boost 50" Rigid Radius bar on roof Aux tank for a total of 48 Gal Of Diesel! Odyssey PC-1750 Battery in trunk, 27"x8.5"/R14 Maxxis BigHorn Mud Terrains, In June '14 issue of Off Road Mag

AX15 Jeep Trans swap in progress....

aaa

GT2256V

913

08-09-2011, 04:39 AM #10

I've been able to swap tailhousings. Capt had trouble with the speedo gear though. But trying to swap a 722.4 tailhousing will definitely not work, the 722.4 tailhousing is smaller.

aaa

08-09-2011, 04:39 AM #10

I've been able to swap tailhousings. Capt had trouble with the speedo gear though. But trying to swap a 722.4 tailhousing will definitely not work, the 722.4 tailhousing is smaller.

300SD81

GT2559V

187

08-14-2011, 11:57 PM #11

Got it in... I just don't have a speedometer, but I have GPS on my phone.

Ich liebe meine Autos!

1981 Mercedes-Benz 300SD | 156K Miles | 2nd Owner | EGR Disabled [Removal Pending] | ALDA Removed | Straight Pipes | GT2256V??? | Laser Interceptor | Engine swap over summer, hopefully with GT2256V attached...

1981 Mercedes-Benz 300SD | Odo Stopped at 160K (at least 50K more) | EGR Disabled | ALDA All The Way Out | Straight pipes | FM-870 Remote Start Alarm System | B100 Biodiesel | AC Fixed x2 | Trunk crushed in Sad

Sad

| Retired to garage.

Excessive speeding? It ain't excessive till I redline!

300SD81

08-14-2011, 11:57 PM #11

Got it in... I just don't have a speedometer, but I have GPS on my phone.

Ich liebe meine Autos!

1981 Mercedes-Benz 300SD | 156K Miles | 2nd Owner | EGR Disabled [Removal Pending] | ALDA Removed | Straight Pipes | GT2256V??? | Laser Interceptor | Engine swap over summer, hopefully with GT2256V attached...

1981 Mercedes-Benz 300SD | Odo Stopped at 160K (at least 50K more) | EGR Disabled | ALDA All The Way Out | Straight pipes | FM-870 Remote Start Alarm System | B100 Biodiesel | AC Fixed x2 | Trunk crushed in Sad

Sad

| Retired to garage.

Excessive speeding? It ain't excessive till I redline!

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