Engine swap
10-10-2018 | 10:31 PM
#1
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Joined: Mar 2007
Posts: 141
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2007 Gl450 2006 cls55
Engine swap
looking at a 2007 gl450 with a blown motor can I drop in a 550 motor without too much modifications. I know physically it will fit but will the original 450 ecu work on the 550 motor? Thanks
10-16-2018 | 03:30 PM
#2
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Joined: May 2013
Posts: 437
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From: Espoo, Finland
2012 GL 350
I don't know the specific answer but generally you need to buy an ECU for the engine you are installing; that's the way it's been for every engine swap that I've done. You may need to buy a harness as well (assuming you're buying a junkyard motor that will come complete rather than a long block.)
10-18-2018 | 01:34 PM
#4
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From: ATL
2017 GLS 550
there is not that much of a difference, actually. the only difference is internal to the engine (Bore and Stroke). externally they are pretty much the same. including exhaust mainfolds. I would imagine the ECU would adapt to the different air/fuel ration requirements of the larger displacement. If you get a 550 motor out of anything other than an x164 you will probably have to swap things like oil pan, and some ancillary parts. I don't think you will have an issue.
Last edited by thtguy; 10-18-2018 at 01:35 PM. Reason: additional info
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Eliezer Aguilar (09-29-2022)
10-19-2018 | 09:41 PM
#7
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10-19-2018 | 09:55 PM
#8
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2008 gl320cdi
I was very skeptical but that’s awesomeWas thinking could have install a widband o2 sensor just to confirm air/fuel correct. Plx has some good units and ways to monitor. If off could probably then get a custom tune.
Last edited by smiledr996s; 10-20-2018 at 05:05 AM.
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Eliezer Aguilar (09-29-2022)
10-31-2018 | 07:17 PM
#11
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From: In my garage
E55, GLS450, GL63, GLE350
It was literally plug and play other than the oil pan and oil pickup? Connectors all matched up? Thanks for the response. Would be nice to have the additional power of the 550 engine.
05-02-2019 | 03:26 PM
#12
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Joined: Oct 2018
Posts: 256
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From: New Jersey
GL 450
2014 G 450
I know it is a different vehicle. I need to swap the engine in a 2014 GL450, long story, painful.
it is a 278928 30 1717137.
The S550 and CL550 appear to have the same engine. I have heard anecdotally that the sedan engines will fit, with swapping the oil pan. This appears to be consistent with your experience.
Do you think i am on the right track? Any other advice or preventative maintenance that should be done while the engine is out? Rear main seal for example?
it is a 278928 30 1717137.
The S550 and CL550 appear to have the same engine. I have heard anecdotally that the sedan engines will fit, with swapping the oil pan. This appears to be consistent with your experience.
Do you think i am on the right track? Any other advice or preventative maintenance that should be done while the engine is out? Rear main seal for example?
