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Old 11-08-2011, 12:34 PM
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Rzeppa Rzeppa is offline
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Join Date: Aug 2005
Location: Kittredge CO, USA
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Originally Posted by Woodsman View Post
As I understand it, it is mechanical noise due to it being a mechanical injection. The ultra-high pressure injectors have played a big part in quieting the new diesels. However, if you want simple and reliable you want mechanical.
I have been told that the reason that Toyota's diesels are so quiet and Detroit's are so loud is that Toyota uses indirect injection (precups) and Detroit uses direct injection. I do know that my 1HZ was REALLY nice and quiet, and unlike a powerstroke or cummins, you could actually hold a conversation while standing next to it while the engine was running.
Jeff Zepp
Kittredge CO USA
1971 & 1976 FJ40s, 1978 FJ45, 1987 FJ60
Rising Sun 4WD Club, TLCA #4063
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