before doing anything to the vehicle check your oil level and quality. try changing your oil and getting something with a higher viscosity (thicker) try a 20/50 . since the oil will be thicker it will act as a cushion between the lifters and the camshaft or lifter and the pushrods. if you don't want to change your oil just yet, there is an additive that i don't quite remember the name but is made by a company name LUCAS and well when i buy it i ask for engine lucas and they usually know what it is. this will help your oil lubricate better and quiet down those anoying lifters. (it does take a few miles for it to take effect) ---------------------------------------------------------------------------------------- Ford shows SAE 5 W - 20 oil for the 2000 F150 4.2 L V6 engine ( 6 quarts with filter change )
If you are getting unusually high or low ( or no ) pressure reading and the engine has not started to become very noisy on the top end then the switch may be going bad. If the low oil pressure reading is indicating an actual lack of oil pressure the engine will heat up quickly and become noisy, lifters and cams first then crank later. Dont push it to that have the unit checked right away to avoid costly repairs. Your vehicle is equipped with OBDII diagnostic computer so a oil light will trigger some kind of trouble code even if it does not prompt the check engine light so have the codes read as well.
: See link below for adjustments - TechJKI just changed the fuel injectors in my 1997 Malibu 3.1. There was no adjustment for the lifters. The rockers are torqued and if you still have noise you must replace the pushrod or the lifter. My problem turned out to be a noisy fuel injector. A 2000 3.1 I worked on after I did mine also had noise but the injectors were not the source. That one had a bad(very slightly bent)pushrod but ran fine with no repair.
Had noisy lifters in a 99 Acura. Shop I took it to did an oil change w/filter using ATF-3 (said ATF is oil with detergents). Ran for about 15 minutes, and then did an oil change using oil, ran for 30 minutes, did 2nd oil change, and told me to drive for 100 miles or 1 week, brought it back and they did a 3rd oil change. I thought they were crazy, but I'll be dammed if it didn't solve my problem.
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