Started up my '98 Durango 4x4 today to hear it knocking. Gets much louder
at about 2000 RPM. The wife ran it out of oil a couple of days ago.
Anyway, I was curious if anyone had any thoughts or experience with
replacing my 5.2L with a new or rebuilt 5.9L. They seem to be running about
the same price and I know Durangos came with both. Will I need to do
anything else besides just swapping out motors?
Use the original computer, but use the 5.9 injectors. Remember the 5.2 was
internally balanced and the 5.9 is externally balanced, so you cannot mix
either the harmonic balancer nor the flywheel/flexplate.
You are exactly correct about the performance and economy. When I changed
from 5.2 to a 5.9 I saw 2mpg better economy. That extra stroke is worth 40
ft/lbs across the entire speed range at virtually no extra cost.
or just keep it topped of for her. if it is leaking so bad she can't go
somewhere without it all running out then there is another issue that should
have been addressed.
i agree that the 5.9 will be a major upgrade over the 5.2. better mileage,
more power and more durable.
That's just the thing.......I don't have any signs of leaks anywhere. Even
checked the coolant for mixing. It doesn't smoke a puff either. Still
scratching my head over that. I'm sure the repair will reveal alot.
Admittedly, I should have been keeping a closer eye on the levels though.
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