The problem with the Isuzu NPR engine is that it's not emissions-certified for the same class of the Suburban, which would make ir harder to get it registered stateside. Well, unless you'd have the time to get approval from a smog referee who could give you a waiver claiming this engine would be equivalent to something else actually certified. I have already persuaded some rednecks to not attempt to import Brazilian MWM 4.2L straight-sixes to fit into F-250s and Silverados for this very same reason.
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Originally Posted by aardvarcus
Honestly I picked this project/engine and had already bought them before the R2.8 was announced, had it been around I may have chosen a different project. At the time there were very few “legal” engine swaps, and the fact that the Suburban was a factory diesel was a major deciding point for me at the time. If I decided to pursue a smaller diesel, I would be more inclined to put a R2.8 or similar in a 90’s 4Runner than to continue with the Suburban.
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Both engines have their pros and cons and, even though a smaller vehicle is likely to be considered as more suitable to the R2.8 than a full-size, it's not a bad choice. Well, even though I still enjoy much of the old-school Diesels that wouldn't require a computer to keep running, nowadays I can't deny the newer electronically-controlled ones also have their merits.
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But assuming my lifetime prediction is accurate 10 years is a long time from now, so who knows what will be available and what I will need at the time.
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Maybe you won't be even considering an engine overhaul by then. Who knows...