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Re: Engine Failure due to oil pump?
The engines in the 98-2004 years do have a design flaw that causes them to use oil at an alarming rate, some more then others.
For what ever reason, still unknown to many of the 98-2004 owners, these 3.2L Dohc's just start using oil at a very alarming rate sometimes without a previous issue. It seems to 1st start happening at about 60k-80k; other times, these engines blow a rod without being low on oil as well.
There really is no true way to know that you burnt through 5 qts in 100 miles; I too do a lot of highway driving, and respectively speaking 100 miles is a fairly short distance - most of the time, people that are on the highway only stop when they run low on gas. Well the tanks on these Rodeo's can give you at least 250-300 miles before truly needing to stop for gas - thus, at the time, one should check their oil level as well.
Well, you didn't even get 100 miles down the road and that is terrible, and unfortunately there IS no warning on these gages that tell you when you're low, only the oil pressure light.
I truly believe in the fact that Isuzu took this engine design too far, as an example this engine, the 3.2L, 1st started out as a Sohc 175hp in the 93-95yrs; then they kept it in the 95.5-97yrs with the Sohc at 190hp; and then they stretched even more out of it for the 98-2004 yrs at 205hp in the Dohc set-up.
I have yet to hear of this happening in the 93-97yrs of the 3.2L Sohc, some of those years use a bit of oil, but I've yet to hear of one burn through it that fast, and/or blow a rod with a full sump. It seems to only be an issue in the 98+yrs of the 3.2L Dohc, and I don't agree with the theory of it being a rare problem, it actually seems to be heard of a lot, and I just wonder if it's because they pulled too much out of it, personally.
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