W140 engine swap... will this fit? - PeachParts Mercedes-Benz Forum

locry · #1 09-11-2012, 07:30 AM

For those who have removed the dreaded 3.5L 603 from their w140... paging Sixto.

This is a 602 turbo engine from a korean suv... is the oil pan the same as the 603? And will my transmission (from an M104) bolt on to the 603/602?

The engine mount arm is for the SUV, will the mounting arm from the m104 fit the 602?

There's also a 601 turbo version 2.9L (so they say)... thinking of installing one of those on a w201.

in the future that is.

locry · #2 09-11-2012, 07:36 AM

This is the Korean version of the vacuum pump... don't know if the design is an improvement from what we normally have.

Tranny bolt pattern... the same?

sixto · #3 09-11-2012, 02:58 PM

The big question is the rear sump. Passenger car 60x's and 10x's have a front sump. You might need the oil pump and sump from a 250D. The 104 mount arms should attach to the block but I don't know how they'll line up with the crossmember. The 124 and 210 which accept 4-, 5- and 6-cylinder 60x engines have the engine and transmission interface at different locations, moving aft with more cylinders. You'll either have to shift the transmission forward and get a longer prop shaft or shift the engine aft. Maybe both as sump clearance allows.

The 60x and 10x have the same bell housing bolt pattern so that should be okay. If your car has a 722.5 5-speed AT, I don't know if the module that shifts from third to fourth needs something from the ECU/EDS. Otherwise it might shift from third to fifth by default. Either way, the 3.46(4AT), 3.69(5AT) or 3.92(MT) diff ratio of the early S280 is way short for a 603 but might be just right for a 602. If you have a later S280 with 722.6, good luck making it shift out of second.

Does the IP use mechanical or electronic throttle? Mechanical is on the block side of the IP.

That looks like a variaton of the Barluk(sp?) rotary vane pump found in late '97-up E300s. I"m not aware of problems with this pump. It has a simple slot drive so failure will probably be more in line with how a water pump fails rather than how the reciprocating pump in 603s fails. Kaboom! It amount to the same thing losing brakes in a 2-ton car

My Euro is rusty but IIRC the 2.9l is a 602, not 601. It's basically the G290 engine. Not sure if it was used in the 124 or 210. I think it was the 4-valve 605 used in the 210 E290. In fact the 2.9 is the 5-cylinder version of the 3.5 but I don't know if the 2.9 has the rod bending propensity of the 3.5.

Sixto
87 300D

locry · #4 09-12-2012, 03:31 AM

I always thought the engine mounting point on the block was the same for the 4,5,6 cylinder models, just the fore end of the engine getting longer and nearer the radiator... guess I was wrong.

I'm not familiar with how the oil pump is mounted inside the block... where is it exactly? do I just change out/fabricate a tube so it sucks oil at the front? Or do i have to physically relocate the pump itself?

I can probably just have the pan "modified" if I can't source a 602 sump.

I didn't check if the throttle was mechanical, if it were electronic... can I somehow rig it so it's mechanical?

Yeah I figured the 2.9 602 had the same bore/stroke as the 3.5L... and I was doubtful a 4 cylinder could be bored to a 2.9L... the caretaker was adamant that it was a 2.9 though... I'm not getting that one that's for sure.

I'm not 100% sure if my tranny is the .5 or the .6... how can I tell? I'm gunning for an all mechanical unit as you all know.

About the tranny... so it's safe to move the tranny fore/aft? Or does the tranny mounting point have to be exactly where it is now?

I can have the engine mounting arms fabricated... which I think would be easier than having to relocate the transmission. Either way, the shop can deal with the prop shaft no problem.

Thanks for replying.

sixto · #5 09-12-2012, 11:42 AM

Here's the oil pump on a front sump 603. 602 is similar. I don't know how a rear sump is different but I imagine the pick up tube extends to the sump. The front sump versions have a cast pick up tube with integral relief valve (second picture). There should be spares available in the US with the recent spate of failed vacuum pumps and chains. Oil pans too.

The fly-by-wire IPs I've seen in the 96-99 E300 have no external throttle linkage whatsoever -

There's a chance you have a 722.3 which is fully mechanical. If the car has a conventional dipstick, it should be a 722.3 or .5. If the shift lever gate shows D-4-3-2, it should be a 722.5. The transmission number is etched into the starboard side of the transmission case on a vertical surface just above the oil pan gasket line. Look for numbers that begin with 722. The fourth digit will tell you what you're dealing with. I don't think the 722.6 was available in the '95 model year even in Europe.

Index the front and rear sections of the prop shaft before separating so you can maintain factory balance. Although factory balance becomes irrelevant if you modify the front section.

Does the Ssangyong turbo have a pressure or vacuum wastegate actuator? Or is it a VNT without a conventional wastegate?

Sixto
87 300D

locry · #6 09-13-2012, 04:05 AM

Thanks again.

I'll have to double check the wastegate actuation. I think I saw some linkages in there but again I'll double check.
If the pump is driven by the chain then I guess the difference would just be the pickup tube. Easy enough to fabricate I think IF i can't get a hold of one. I'll try to search for a sump and a pick up tube before I commit to this project.
It's either this or an old Galant for the timebeing.

hehe
Again thanks

btw... I do have a tranny dipstick... so I guess its not computer controlled?