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#1
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420 SEL engine help
Is the 420 SEL engine the same in 1986 through 1991 Models ?
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#2
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AFAIK, yes.
M116 4.2 V8 engine, no changes (not in the UK anyway!) Cheers, Martin
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1990 420SEL 217k Miles 1975 Chevy K10 400ci SBC power! 1995 Jeep Cherokee 4.0 Limited 1997 Suzuki GSXR750 SRAD 1989 Kawasaki GT550G4 |
#3
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reviving this thread...
Did a search and found this; does anyone know the exact differences between the early, ('86-'89), and late, ('90-'91), M116 engine in the 420 SEL?
I have a '91 model that needs a heart transplant and have heard varying info on the differences and subsequently the PIA factor of using an earlier long block. Obviously the ideal would be to locate a healthy late motor, but all I am finding is early ones. TIA for any help. |
#4
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You'll be fine w/ any 86-91 420 engine.
Jonathan
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Blue Ridge Mercedes Jonathan Hodgman http://www.blueridgemb.com/ Enthusiast Service, Restoration & Tuning. Follow Us on Facebook! Located in the Atlanta area Specializing in all pre and post merger AMG's including Hammers and DOHC M117 engines. Mercedes Repair Atlanta |
#5
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the differences are the sensors on the intake manifold and the fact that the later models had the small starters[which were interchangable]
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David S Poole European Performance Dallas, TX 4696880422 "Fortune favors the prepared mind" 1987 Mercedes Benz 420SEL 1988 Mercedes Benz 300TE (With new evaporator) 2000 Mercedes Benz C280 http://www.w108.org/gallery/albums/A...1159.thumb.jpg |
#6
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So the intake manifolds would have to be swapped? No other differences? Someone told me that the later engines had an extra hole in one of the heads for a sensor or a tube(?) which would be missing on an early engine.
I really appreciate the help from shop owners who have actually done this swap/interchange. |
#7
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The early engines used a warm up regulator and the later ones use a small computer. There are some sensor differences and with my '89, there are some differences WRT to the service manual.
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Regards Warren Currently 1965 220Sb, 2002 FORD Crown Vic Police Interceptor Had 1965 220SEb, 1967 230S, 280SE 4.5, 300SE (W126), 420SEL ENTER > = (HP RPN) Not part of the in-crowd since 1952. |
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