Posted by jdemaris on November 24, 2013 at 04:57:48 from (70.194.0.155):
In Reply to: diesel engine life posted by husky on November 23, 2013 at 20:01:13:
Being a diesel does not have direct correlation to long life. The fact is that more diesels were built for HD use and therefore more built to endure that heavy use with stronger parts. There are HD gas, LP and NG engines that have equal durability.
Also - diesel engines make less power per cubic inch that gas - so they tend to be bigger to make equal power. I'm talking about when factors are equal. Same bore and stroke and same aspiration. A diesel often makes 10%- 20% less horsepower and torque.
Many diesels had short lifes. Like late 70s Oldmobile 4.3 and 5.7 diesels? Some diesels were built from gas engine platforms and were LD. Isuzu 1.8 and 2.2, Volkswagen 1.6 but did OK in light use. The Ford-IH was built from a HD gas engine and did fine as a diesel with heavier use.
Many well built medium-duty diesels like a Cummmins 5.9, Ford-IH 7.3 or 445 often see 300,000-400,000 miles with no major engine tear-downs. Many farm tractor diesels are good for 10,000 engine hours between rebuilds.
HD diesels are often built to last 1,000,000 miles.
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