Question about 1998 Ford Explorer

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302 ci. 5.0 ltr . oil pump replacement - 1998 Ford Explorer

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Why do you want to replace the oil pump? I am asking this question for good reason. Engines that have worn bearings will have low oil pressure, and replacing the pump will not solve this problem. If you are replacing the pump because of low pressure, then you really need to consider correcting the cause of the low pressure. To replace the pump, you need to remove the oil pan from the bottom of the engine, which will likely involve raising the engine. Once the oil pan is off, you can readily remove and replace the oil pump.

Posted on Aug 24, 2010

  • ben poll Oct 11, 2011

    check valve in the pump is not working so no oil flow at start up

  • ben poll Oct 11, 2011

    i was told the front cover? needs to come off as well? not sure why or if i can do it without all the hassle.

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What is the spark plug firing order for a 1989 Ford Bronco with a 302 Cu. In. V8 engine?


There are three kinds of 302s made from 1982-2001. 5.0L HO This engine was used in 1983-1995 Mustangs, Mark VII Lincolns, and some T-birds and Cougars. All Explorer 5.0L engines are 5.0L HO engines as well. They use the 351W firing order, 1-3-7-2-6-5-4-8. Except for the 1983-84 Mustangs, all of these engines are roller cam equipped. They use a reverse rotation water pump and front cover. The 1994-5 Mustang and all Explorers use a unique front cover and water pump. 5.0L Full Size Car This engine was used in 1982-1990 Crown Victoria and Grand Marquis. They use the 289-302 firing order, 1-5-4-2-6-3-7-8. Most of these cars are not roller cam equipped, however sometime in the early 1990s they started using roller cams but retained the 302 firing order. They use a standard (clockwise) rotation water pump and front cover. 5.0L Truck (except Explorer) These engines are similar to the Full Size Car engines, except they use different intake manifolds and camshaft profiles. They also use the 289-302 firing order, 1-5-4-2-6-3-7-8. They also began using roller cams sometime in the early 1990s. They use a reverse rotation water pump and front cover.

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I recently had an emissions test done on my '90 Ford Bronco, it passed all areas except the HC level. The HC limit is 400ppm @ an idle, the first test my reading was 1812, the shop that tested said that if...


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Probably an oil pump, will it still do this if you rev the engine a little while stopped? If not then you have an oil pump that could be failing or hopefully it is the pressure sensor that is off. either way don't chance it

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1 Answer

Just replaced a 1998 catera engine now have no oil pressure was told i had to "prime the pump" how do i prime the oil pump?


The best way to prime the pump hoping that you havent ran the engine to long without oil pressure
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Loud niose from centre of manafold motor run nice & smooth ?


on the 302 you can not see the cam and lifters unless you remove the manifold. did you try removing the distributer and turning the oil pump shaft until the light in the dash goes out? that will drive oil to the upper cylinder assemblies, other than that you may be looking at replaceing some damaged bearings and or camshaft.

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try changing the oil pump sending unit relay. if that doesnt work have your oil pressure checked to make sure your oil pump is fine

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2 Answers

Noise at bottom of oil pan


Hello Josh thank you for using FixYa for your answer my name is David.
sounds to me like it Has something to do with the oil pump or the maybye even the screen here is a list of things it may be.
1 Inspect Valve Lifter Insufficient oil supply to valves and lifters. grey_line.gif 3 Inspect Rocker Arm Worn or incorrectly adjusted rocker arm(s). grey_line.gif 4 Inspect Rod Bearing Incorrect rod or main bearing clearances grey_line.gif 5 Inspect Oil Pump Damaged or faulty oil pump grey_line.gif 6 Inspect Oil Pump Drive Gear Damaged or faulty oil pump drive gear grey_line.gif 7 Inspect Oil Pump Screen Clogged oil pump screen grey_line.gif 8 Inspect Engine Oil Capacity Low engine oil level

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