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#1
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Possible alternative con-rod for 350SD engines
Was thinking the other night.
Here in UK we have Sprinter 2.9 Turbos... These are 5 pot 602 engines.... Now if we divide 2.9 by 5 we get 580cc The 350SD is the 603 engine, with 6 pots.... If we divide 3.5 by 6 we get 583cc.... Maybe the rods are a reliable possible replacement for the older 350SD engine.... Maybe I havent a clue though.....
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http://i190.photobucket.com/albums/z...0TDnoplate.jpg Alastair AKA H.C.II South Wales, U.K. based member W123, 1985 300TD Wagon, 256K, -Most recent M.B. purchase, Cost-a-plenty, Gulps BioDiesel extravagantly, and I love it like an old dog. W114, 1975 280E Custard Yellow, -Great above decks needs chassis welding--Really will do it this year.... |
#2
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Interesting idea. Mercedes has updated the 350's rods though, there's been like 5 revisions.
-Jason
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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket Tesla Model 3. 205,000 miles. Been to 48 states! Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels. 2014 Cadillac ELR 2013 Fiat 500E. |
#3
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Those 2.9L engines are direct injection.
There was never a 5cylinder version of 3.5L 603.97. |
#4
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Thought the pistons themselves would be different, I don't think being DI or IDI predetermines the rod type. The head and pistons are the only difference on a VW 1.9TD and 1.9TDI.
-J
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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket Tesla Model 3. 205,000 miles. Been to 48 states! Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels. 2014 Cadillac ELR 2013 Fiat 500E. |
#5
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It makes a HUGE difference. The piston has to sit higher for the combustion bowl in the piston so the rods have to be shorter to make up for it.
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#6
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Quote:
Nah, Nearly certain they are the usual Pre-Chamber engine. (Number, = OM.602.9xx, and look identical in appearance to the OM-602 in my 190D 2.5 ) They are also used in Sssanyong Musso 4x4. These are defo Idi pre-chamber motors, and are 2.9 litres offered in n/a and Turbo.... You are right, there never was a 5 pot 3.5.... You're thinking of the newer Direct-Injection CDi 5 and 6 pots, which are Totally different--They are DOHC to start with!....
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http://i190.photobucket.com/albums/z...0TDnoplate.jpg Alastair AKA H.C.II South Wales, U.K. based member W123, 1985 300TD Wagon, 256K, -Most recent M.B. purchase, Cost-a-plenty, Gulps BioDiesel extravagantly, and I love it like an old dog. W114, 1975 280E Custard Yellow, -Great above decks needs chassis welding--Really will do it this year.... |
#7
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#8
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Notice the differences between the indirect injection and direct injection.
OM603.97 (the best picture I could find as an example): Glowplugs go in straight into the prechamber. OM602.98: Glowplugs go in at an angle to into the combustion chamber. Also notice the small injector holes and increased webbing on the lower potion of the block for strength. OM602.96: One large hole for the prechamber. OM602.98: No large hole for a prechamber, only the small two for the injector tip and glowplug. Last edited by ForcedInduction; 04-07-2009 at 06:05 AM. |
#9
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Do you know, F.I?
I am convinced I have seen a Pre-Chamber 5 pot, 2.9 Turbo motor--It was in bits at a local M.B. commercial-vehicle specialist some time ago... There seem to be so many variations out there, maybe such a thing exists. Any idea what the OM662 actually is--Cant find much about it apart from its 'similar' to the 602??
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http://i190.photobucket.com/albums/z...0TDnoplate.jpg Alastair AKA H.C.II South Wales, U.K. based member W123, 1985 300TD Wagon, 256K, -Most recent M.B. purchase, Cost-a-plenty, Gulps BioDiesel extravagantly, and I love it like an old dog. W114, 1975 280E Custard Yellow, -Great above decks needs chassis welding--Really will do it this year.... |
#10
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#11
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Hmm,--
Dont Forget, Not Everything that M.B and for that matter Ssanyong made was supplied to America..... We may have models and engines never heard of over there..... I didnt refer to whether or Not it had an Intercooler or VP29 IP either....It WAS in bits! OM662 Isnt a Typo either. It DOES exist. I have looked it up in my 2004 'Autodata' disc and its supplied to Australia in a minibus MB100 type van/commercial, as well as the later Ssanyong Musso/Korado! (Always SO confrontational!--I dunno!.....)
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http://i190.photobucket.com/albums/z...0TDnoplate.jpg Alastair AKA H.C.II South Wales, U.K. based member W123, 1985 300TD Wagon, 256K, -Most recent M.B. purchase, Cost-a-plenty, Gulps BioDiesel extravagantly, and I love it like an old dog. W114, 1975 280E Custard Yellow, -Great above decks needs chassis welding--Really will do it this year.... Last edited by Alastair; 04-07-2009 at 09:43 AM. Reason: addition |
#12
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#13
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............Looks like its the non-MB made ripoff/licensed version of the OM602..............
Not so sure about that.... Ssanyong list the 602 as well as the 662, and the data is different for each engine. M.B. also list the 662 for some Aussie commercials too....
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http://i190.photobucket.com/albums/z...0TDnoplate.jpg Alastair AKA H.C.II South Wales, U.K. based member W123, 1985 300TD Wagon, 256K, -Most recent M.B. purchase, Cost-a-plenty, Gulps BioDiesel extravagantly, and I love it like an old dog. W114, 1975 280E Custard Yellow, -Great above decks needs chassis welding--Really will do it this year.... |
#14
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Quote:
-Jason
__________________
1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket Tesla Model 3. 205,000 miles. Been to 48 states! Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels. 2014 Cadillac ELR 2013 Fiat 500E. |
#15
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Heavier rods are available from Mercedes
You can buy the heavier 350 rods from Mercedes. I believe they are for the 1995 S350.
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1991 350SD (updated rods) Biodiesel B100 when I can find it. Dino when really cold outside |
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