I have a 88 Mazda truck with a machanical oil pump, new engine, and I still have plenty of time until I need to change my oil and filter. My pressure starts off fine, but once I have driven for a hour or two it drops to almost 0 at idle. I have the right oil weight in the truck.
2006-08-25 13:55:03 · 9 answers · asked by dicanus1 2 in Cars & Transportation ➔ Maintenance & Repairs
it might be your oil pump going out. While your truck isn't running the oil will drain to the bottom of the pan and make it easier for your pump to draw oil in. As you drive it becomes more difficult for an oil pump to draw oil. I would get your pump checked out asap.
2006-08-25 14:01:57 · answer #1 · answered by Adam F 4 · 1⤊ 0⤋
If you really are getting near o psi at a hot idle, you either have a bad oil pressure sensor or are going to be in trouble. The engine is getting a little worn out. How many miles? Oil pressure should be near 20 at least at idle. Low oil pressure will wear out the crank and cam bearings fairly quickly. Hopefully all it is is a bad sensor or gauge. I would hook up a mechanical oil pressure gauge and verify the correct pressure readings to find out if the problem is external or inside the engine. To adjust, repair, or replace the oil pump, you need to drop the oil pan,anyway, so while you are in there you might want to replace the crankshaft bearings. If the engine has tons of miles on it, I'd just rebuild it or replace it with a rebuilt or new one.
2006-08-25 14:19:31 · answer #2 · answered by Nc Jay 5 · 0⤊ 0⤋
sounds like the bearings may have too much space between them and the mains. most experts wold say to tear down a engine to check that before installing it, even if it came from mazda, gm or whoever. they also say as long as you have 10 psi on oil press for every 1000 rpm you don't have to worry about damaging anything
2006-08-25 14:07:57 · answer #3 · answered by Anonymous · 0⤊ 1⤋
Replace the oil pressure sending unit, it reads the pressure and send the information to the cluster, if you don't hear any abnormal noise when your pressure drops then it is that pressure unit or switch
2006-08-25 14:01:19 · answer #4 · answered by class4 5 · 1⤊ 0⤋
if you are sure that the gauge is working properly then you might have a weak oil pump. your best bet is to replace your pump.
2006-08-25 15:28:52 · answer #5 · answered by chevy 2 · 0⤊ 0⤋
If its possible, get a high volume oil pump.
2006-08-25 13:57:52 · answer #6 · answered by Silverstang 7 · 0⤊ 0⤋
You got big problems if you don't have a grantee on that engine as either the crankshaft or the bearings are NFG.
2006-08-25 14:04:42 · answer #7 · answered by Billy M 4 · 0⤊ 0⤋
put in some 90 wt. gear oil
2006-08-25 23:50:28 · answer #8 · answered by Anonymous · 0⤊ 0⤋
add a product like STP or motor honey. works for me.
2006-08-25 14:01:47 · answer #9 · answered by Chuck C 4 · 0⤊ 0⤋