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  #1  
Old 11-14-2008, 06:55 PM
bossjb bossjb is offline
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4.2 Oil Pump Install

Hey guys I was wondering if there is a special tool or any specific information needed to replace the external oil pump on my 97 F150 w/ 4.2 auto. Just wondering, didn't want to find out after jumping into it with both feet that I may need something.
thanks, Jeff
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Old 11-14-2008, 10:02 PM
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I believe you still have to drop the pan to remove the pick-up tube before removing the pump I believe. I could be wrong.
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Old 11-15-2008, 02:08 AM
bokker bokker is offline
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hi, its simply bolted on. be carefull when removing it because the oil pump drive is very thin and easy damaged.
i may be off base but why the replacement. i changed my pump due to loss off pressure only to find that the problem was coolant in the oil.
97 was the bad gasket year and distroyed my engine. bokker.
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Old 11-15-2008, 12:50 PM
bossjb bossjb is offline
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Because best I can tell it is going bad. When its at normal running temp and I stop (stop sign, red light) and the rpm's drop to idle while in gear the oil pressure bottoms out and the light comes on. I can put it in neutral or park or just increase the rpm's and it jumps back up to normal. I don't think its a bearing issue because the pressure would probablybe low all the time if that was the case. I am going to do a compression test today to see what it reads across the board just to be sure on the head gasket but there is no coolant in the oil.
Jeff
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Old 11-15-2008, 03:55 PM
bokker bokker is offline
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hi again, the symtoms were exactly the same as yours with the oil pressure dropping like a stone at low revs. keep a close eye on your coolant level, to be sure.
the issue with the gaskets was not head but lower intake and timeing case gaskets.
do a search on the v6 4,2 forum "hydro locking" and hopefully it may save you the cost of a new oil pump. hope all is well bokker.
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Old 11-16-2008, 10:01 PM
bossjb bossjb is offline
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Looks like an oil pump fixed it. I let it idle for about 20 minutes after I got finished and then drove it around for about 20 more and haven't noticed any fluctuation in the gauge. I'll give it a couple more days to make sure but it looks promising. Thanks for the help..
Jeff.
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Old 11-16-2008, 10:01 PM
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Go Back   Ford Truck Enthusiasts Forums > Performance, Engines & Troubleshooting > Ford V6 > 3.8 & 4.2L V6

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1998, 42, 42l, 50, diagram, external, f150, ford, installation, installing, oil, pum, pump, v6, whistle

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