Question about 1996 Isuzu Trooper

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I have a 96 isuzu rodeo with a 3.2 and an automatic trany... i just put in a new oil pump in it cause of it was seeming to not have enough pressure to get enough oil to the upper end of the motor... i am still having the same problem... is there a press relief spring in the system some whare and ware is it found

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  • skinnykid829 Jan 03, 2009

    the problem is that i still have the same problem after changing the oil pump... is there a relief valve or spring that may be bad



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There's an oil relief valve under your valve covers, one on each side. They stick up about an 1.5 inch. at the end of your cam, you need a 10mm socket to pull them. They can cause problems, they led to mine spinning a rod bearing. I didn't realize they were bad until after rebuilding the motor. After the rebuild my oil pressure only showed around 40 psi on the dash. Most people think this normal but it isn't. These motors should be around 70-80 psi on your dash. There are other things that can cause a low reading, one of them being the shafts that hold your rockers, they're prone to wearing too if the pressure relief valves are bad. If these get worn you might as well buy another engine. I have slight wear on mine and my oil pressure is around 55psi. Just to give you an idea, the rod is around $100.00 per side and each rocker is $34.00, that times 32 valves, you get the picture. If those are worn then your main and rod bearings are probable going to go to. I put over a grand into a new crank, main and rod bearings. And that was doing it myself. A lot of people keep recommending all these miracle additives to cure ticking motors, get a life people, if it's ticking there's a problem. By the way my motor only had a 134k, and was maintained flawlessly. These motors are ****.

Posted on Jan 10, 2009

  • Micky Roberts Jan 10, 2009

    Michigan man,

    Read his post, he says he isn't getting any oil to the top of his motor. A sending unit isn't the problem.


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There should be an oil sending unit somewhere near the oil filter and if it is the sending unit this would have been alot cheaper then changing the oil pump

Posted on Jan 03, 2009

  • edgar walker
    edgar walker Jan 03, 2009

    I know there is a pressure spring or valve somewhere but do not know where do you have a repair manual? if not see if auto zone can down load a picture telling you where it is located at



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1 Answer

How to change oil pump on 1996 Isuzu rodeo

tell full symptoms, i bet it not the pump.
which engine.2.2 or 3.2. there are 3 engine in USA. used
nothing stated.
ii pretend you said, 3.2
the FSM shows.

  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2. Remove or disconnect the following:
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all that and more, at
but for Diagnosis, GEE< ask.
post SYMPTOMS> and get real answers.

there can be low or too much oil presssure.
low is most common, but is different
and all rpm's.?
non of which was stated.
the #1 causes of low pressure ,is running the wrong oil viscosity.
if 10w-30 is in car, and low, the bearings are shot.
1 or all of them.

do you own a real oil pressure gauge, accurate. not some 5$ china
imported, trash?

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