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OM603 Turbo on an OM602
So...I have an '87 300SDL with the OM603 diesel. I also have a '91 300D daily driver. I'm tired of the vacuum turbo setup. Can I swap the 300SDL's pressure-actuated Turbo into my 300D?
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Not sure of the differences... But however you can bypass all the vacuum if you look up the egr delete and wastegate swap. It cost 80 to out a pressure actuated wastegate and you can get rid of all the **** next to the air box. Also why fix something that isn't broke. That system is reliable provides gbe vacuum hoses are in good shape
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Well...rather then send my Turbo out to be rebuilt, I thought if I could just swap out that it would be easier.
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OM 603s use a T30 turbo and the OM 602 s use a T25 turbo, so that's something to consider.
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Noob ALERT! What would the difference be between them? Would it be detrimental to the engine? Sent from my iPhone using Tapatalk |
T30 won't fit, simple as that.
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I don't know of every precise difference but I suspect substituting a non-original turbo for a turbo that was designed for optimal performance as part of a highly engineered drivability package that these cars are would perform at non-optimal levels even if it could be physically accomplished. As far as being detrimental to the engine, possibly not but functionally probably so. I have no reason to argue I was merely pointing out the obvious differences to anyone who was thinking such a move was a direct swap. |
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I don't know of every precise difference but I suspect substituting a non-original turbo for a turbo that was designed for optimal performance as part of a highly engineered drivability package that these cars are would perform at non-optimal levels even if it could be physically accomplished. As far as being detrimental to the engine, possibly not but functionally probably so. I have no reason to argue I was merely pointing out the obvious differences to anyone who was thinking such a move was a direct swap. In addition the OM 603 could have come equipped with a Garret turbo but might have been originally equipped with a KKK turbo in the alternative. That might also complicate any installation. |
The T30 is too big. It won't fit the flange:
https://www.driftworks.com/forum/threads/turbo-flange-dimensions-t25-t3-t04.3809/ If your vacuum controls don't work, fix the vacuum controls. There's no need to rebuild the alternator. |
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I'm not gonna lie...I was a little confused about that last part about the vacuum controls and the alternator. But, now I get the analogy. Thought you'd get a little laugh out if my dense-brained moment. Sent from my iPhone using Tapatalk |
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Eh. No offense taken. That's why I posted here before I even thought of trying the swap. I know you guys know what you're talking about. I do appreciate the advice. Sent from my iPhone using Tapatalk |
You might be able to adapt the 603 turbo's wastegate actuator to the 602 turbo.
Sixto 83 300SD can be yours 98 E320 wagon |
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Hmmm...that might be doable. Sent from my iPhone using Tapatalk |
There's a flat spot on the outlet of the T25. You need to drill and tap it for a 1/4" fitting, and then replace the wastegate actuator with a pressure activated actuator. Once that's done, all you need is a rubber hose to drive the actuator.
It's probably easier to locate the problem with the vacuum system. |
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