C240 to 3.2 engine swap anyone done this?
06-13-2009, 04:17 PM
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E55(210) CL600(140) C320(203) E350 Saks 5th ave. add.(211)
C240 to 3.2 engine swap anyone done this?
Hello to all.. We installed an M112 3.2 engine in an 02' C240. Having some throttle issues at high rpm now. Obviousely the first suspect is the ME computer will need to be upgraded as well. Has anyone done this upgrade or one like it? I anticipated a slight loss of power without the upgraded ME, but not real driveability issues like we're having. Power cuts in and out at high rpm or high load. Under normal acceleration it's fine. Would really like to hear from someone who has upgraded their engine.
Thanks!
Mike
Thanks!
Mike
06-13-2009, 06:38 PM
#5
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All the engine mapping is wrong & you are starving the motor of fuel at high RPM & under load. Don't drive the car like this or the next thing you will burn a hole in a piston or worse because you won't trigger fuel trim warnings.
Either put a 320 ECU into the thing which is correctly mapped or find a dealer that knows what they are doing to flash the 320 engine profiles onto your 240 ECU. The O2 sensors etc should all be the same & I presume you swapped a complete engine over so all other sensors are 320?
Either put a 320 ECU into the thing which is correctly mapped or find a dealer that knows what they are doing to flash the 320 engine profiles onto your 240 ECU. The O2 sensors etc should all be the same & I presume you swapped a complete engine over so all other sensors are 320?
06-13-2009, 06:45 PM
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2012 C300 4Matic
We have cars with both of these engines. A C240 and an E320. The difference is about 50 hp. I can't possibly imagine who would be crazy enough to waste their time. Unless you have your own garage, tools, engine lying around and the free time, then I suppose it's understandable.
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06-13-2009, 07:57 PM
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Only? 22% more power is only? Depending on the circumstances (240 motor shot and needs replacement, 320 from wrecking yard?) I think it's a good way to reliably increase the power if that's what you want to do. All the pulleys, ECU remaps, exhaust 'upgrades', etc. can't do that and with no where near the same reliability.
06-13-2009, 10:13 PM
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06-14-2009, 06:00 AM
#11
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i haven’t heard of a failure of a c240's engine big enough to warrant a complete engine replacement even if parts and labor were free. as said above you should not drive the car with the wrong engine software you could damage various parts in the new motor. i would be interested in finding out why you did this might be a good story.
06-14-2009, 06:53 AM
#13
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+1
There was a member here who swapped his engine with a c32 engine. Can't remember his name all I remember is his Avatar is Peter Griffin from Family Guy licking his own nipple
Anyway I remember he was having a lot of trouble swapping the engine with tons of software changes. I honestly wouldn't go through all that trouble to swap an engine especially on a Merc.
--------------------------------
I'm not Mr. Know it all but
Swapping an engine=sell the car and with that money of the engine or a little more buy a real c32.
Think about it C32 isn't just the engine. It offers way more. (body, brakes suspension)
02 240 - 10 to 13 K
You can get a C32 a nice one too for 15 to 16K?
I would save myself the headache and just get the c32.
But we dont know maybe the OP is swapping it out for educational purposes.
Good Luck, Glyn is right the car is treating the engine like it is a 240 engine. You have to change the ECU so it can accommodate Fuel and Air for the 320 engine.
There was a member here who swapped his engine with a c32 engine. Can't remember his name all I remember is his Avatar is Peter Griffin from Family Guy licking his own nipple
Anyway I remember he was having a lot of trouble swapping the engine with tons of software changes. I honestly wouldn't go through all that trouble to swap an engine especially on a Merc.
--------------------------------
I'm not Mr. Know it all but
Swapping an engine=sell the car and with that money of the engine or a little more buy a real c32.
Think about it C32 isn't just the engine. It offers way more. (body, brakes suspension)
02 240 - 10 to 13 K
You can get a C32 a nice one too for 15 to 16K?
I would save myself the headache and just get the c32.
But we dont know maybe the OP is swapping it out for educational purposes.
Good Luck, Glyn is right the car is treating the engine like it is a 240 engine. You have to change the ECU so it can accommodate Fuel and Air for the 320 engine.
06-14-2009, 10:48 AM
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E55(210) CL600(140) C320(203) E350 Saks 5th ave. add.(211)
Little more info on the swap
Just to clear up a few things... The original C240 motor engine was blown to pieces, literally, water ingestion, lots of flooding here in FL. The owner of the car wanted this upgrade, I try not to argue with my customers anymore, haha.
Anyway, it's a direct drop in bolt up plug in upgrade, with the acception of this possible software issue. Also, cost wise it's the same for the used engine 240 or 320 and same labor. To upgrade to a v8 or a SC engine, that would not be worth doing in my opinion. BTW, I worked for MB dealer for 11 yrs. as a tech, so not new to these cars, just never dabbled with mods and upgrades, for this very reason. According to the EPC, the ME's are the same part #. Anyway, I suppose it's starving for fuel and the self-adaptation will not compensate enough. I think I'll call a tuner, let them know what we did and see if they can help. New ME is too expensive. A used ME will be VIN locked and Star Diag. Can't help there. Would still like to hear from someone who's upgraded their 2.6 or 2.8 to 3.2 OR 4.3 to 5.0. Surely someone on here has done this??
Anyway, it's a direct drop in bolt up plug in upgrade, with the acception of this possible software issue. Also, cost wise it's the same for the used engine 240 or 320 and same labor. To upgrade to a v8 or a SC engine, that would not be worth doing in my opinion. BTW, I worked for MB dealer for 11 yrs. as a tech, so not new to these cars, just never dabbled with mods and upgrades, for this very reason. According to the EPC, the ME's are the same part #. Anyway, I suppose it's starving for fuel and the self-adaptation will not compensate enough. I think I'll call a tuner, let them know what we did and see if they can help. New ME is too expensive. A used ME will be VIN locked and Star Diag. Can't help there. Would still like to hear from someone who's upgraded their 2.6 or 2.8 to 3.2 OR 4.3 to 5.0. Surely someone on here has done this??
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Unkown1 (01-17-2023)
06-14-2009, 10:56 AM
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E55(210) CL600(140) C320(203) E350 Saks 5th ave. add.(211)
Little more info on the swap
Just to clear up a few things... The original C240 motor engine was blown to pieces, literally, water ingestion, lots of flooding here in FL. The owner of the car wanted this upgrade, I try not to argue with my customers anymore, haha.
Anyway, it's a direct drop in bolt up plug in upgrade, with the acception of this possible software issue. Also, cost wise it's the same for the used engine 240 or 320 and same labor. To upgrade to a v8 or a SC engine, that would not be worth doing in my opinion. BTW, I worked for MB dealer for 11 yrs. as a tech, so not new to these cars, just never dabbled with mods and upgrades, for this very reason. According to the EPC, the ME's are the same part #. Anyway, I suppose it's starving for fuel and the self-adaptation will not compensate enough. I think I'll call a tuner, let them know what we did and see if they can help. New ME is too expensive. A used ME will be VIN locked and Star Diag. Can't help there. Would still like to hear from someone who's upgraded their 2.6 or 2.8 to 3.2 OR 4.3 to 5.0. Surely someone on here has done this??
Anyway, it's a direct drop in bolt up plug in upgrade, with the acception of this possible software issue. Also, cost wise it's the same for the used engine 240 or 320 and same labor. To upgrade to a v8 or a SC engine, that would not be worth doing in my opinion. BTW, I worked for MB dealer for 11 yrs. as a tech, so not new to these cars, just never dabbled with mods and upgrades, for this very reason. According to the EPC, the ME's are the same part #. Anyway, I suppose it's starving for fuel and the self-adaptation will not compensate enough. I think I'll call a tuner, let them know what we did and see if they can help. New ME is too expensive. A used ME will be VIN locked and Star Diag. Can't help there. Would still like to hear from someone who's upgraded their 2.6 or 2.8 to 3.2 OR 4.3 to 5.0. Surely someone on here has done this??
06-14-2009, 01:28 PM
#17
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What happened to the original ECU for this engine? Most engine sellers in this country keep the ECU with the engine. The 240 ECU can't adapt sufficiently for a 320.
06-14-2009, 06:11 PM
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Glyn, correct me if I'm wrong, but wouldn't the original ECU be unusable in a different vehicle? I thought it required SCN coding before it would communicate with the other control units in the vehicle due to differing VIN.
06-14-2009, 07:19 PM
#19
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The guys here get around that - I think all you need is a developers code for the STAR.
06-16-2009, 10:29 PM
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E55(210) CL600(140) C320(203) E350 Saks 5th ave. add.(211)
Problem solved! I checked the EPC again and found the C240 and C320 use the same part # ME control unit. Tonight I waited till we closed the shop, shut the phone off and sat in the car with the SDS on my lap for about an hour. I found some descrete coding that allowed me to change the ME from E26 to E32. Took it around the block a few times and it's perfect!
So, it's a cool way to really upgrade a C240 if the engine is to be replaced.
So, it's a cool way to really upgrade a C240 if the engine is to be replaced.
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Explicitblunt (08-31-2020)
06-16-2009, 10:39 PM
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06-17-2009, 12:29 AM
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Problem solved! I checked the EPC again and found the C240 and C320 use the same part # ME control unit. Tonight I waited till we closed the shop, shut the phone off and sat in the car with the SDS on my lap for about an hour. I found some descrete coding that allowed me to change the ME from E26 to E32. Took it around the block a few times and it's perfect!
So, it's a cool way to really upgrade a C240 if the engine is to be replaced.
So, it's a cool way to really upgrade a C240 if the engine is to be replaced.
06-17-2009, 07:18 AM
#25
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Problem solved! I checked the EPC again and found the C240 and C320 use the same part # ME control unit. Tonight I waited till we closed the shop, shut the phone off and sat in the car with the SDS on my lap for about an hour. I found some descrete coding that allowed me to change the ME from E26 to E32. Took it around the block a few times and it's perfect!
So, it's a cool way to really upgrade a C240 if the engine is to be replaced.
So, it's a cool way to really upgrade a C240 if the engine is to be replaced.
The joys of having a SDS.
