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Oil

OIl pressure still drops after changing oil sending unit?

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439 posts В• Page 747 of 212

2007 5.3 oil pressure sensor screen

Postby Takasa В» 13.03.2020

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These symptoms often occur with no indication of a low oil pressure condition such as engine related noises. Some technicians replace the oil pressure sensor in a futile attempt to eliminate the low oil pressure message.

When this procedure fails to solve the problem, they often assume oil pump related issues are at fault or serious engine related problems have occurred. They may recommend some major engine repairs, which would not eliminate the mentioned symptoms.

In some cases, the customer encounters the low oil pressure message and has the oil and filter changed in an effort to correct the symptom. When this fails, the vehicle is often sent to the dealer for further evaluation.

Familiar with the symptom and solution, the technician replaces the oil pressure sensor and a filter screen positioned beneath the sensor, which eliminates the low oil pressure message. Unfortunately, some customers are told the condition was due to the aftermarket oil filter and the incorrect lubricant installed in their vehicle. Naturally, the vehicle owner gets upset and approaches the lube shop requesting compensation for the cost of the repairs.

And he will be hesitant to let the lube shop service his vehicle in the future, as he has been convinced they created the problem. The screen see illustration is actually a filter for the valve lifters on those GM applications equipped with AFM.

The purpose of the filter screen is to help control contamination that can affect the AFM hydraulic system by filtering the oil that flows through the valve lifter oil manifold and its related solenoids.

GM has identified the following vehicles see Affected Vehicles below equipped with AFM as potential candidates for the mentioned low oil pressure message. GM states that some customers may complain of a low oil pressure message on the dash accompanied with a diagnostic code PO When diagnosing with a Tech 2 or equivalent and the oil pressure parameter is low but the oil pressure is normal at the oil filter housing, inspect the AFM valve lifter oil filter screen located beneath the oil pressure sensor for evidence of sludge.

A contaminated filter screen can restrict the oil flow to the oil pressure sensor. If the filter screen is plugged, it can be cleaned with brake cleaner and low air pressure. Most elect to replace the filter screen, as it is a low cost item.

Replacement of the filter screen can be performed without removing the intake manifold, as recommended by the vehicle manufacturer. It will require some basic tools such as a ratchet, socket, short extension, wiggle joint, patience, band aids and forgiveness for some of the comments you will make during the exercise. With sludge forming on the AFM valve lifter filter screen, we can only question some of the recommended extended oil drain intervals.

Can the vehicles be driven the extended mileage and still remain free of sludge deposits? Considering that, how much is really being saved in car maintenance? The cost of an oil and filter change is minor when compared to engine damage due to contamination and inadequate lubrication. Has the technology reached a level that vehicles can be driven for extended oil drain intervals and remain free of contaminants, or is this marketing strategy to sell vehicles by promoting lower maintenance cost?

Operating a vehicle for 12,, miles or changing the oil once a year is not a maintenance schedule I would perform on one of my vehicles. Oil Pressure Loss During Lube Service While it is not a common problem, a technician can encounter a loss of oil pressure when replacing the oil filter while performing a lube service. The condition occurs when the oil is drained from the engine and air becomes trapped on the suction side of the oil pump promoting cavitation and a loss of oil pressure.

The replacement oil filter often gets blamed for this encounter when the condition was actually the introduction of air into the system. Installing a second oil filter often another brand often gets credit for restoring the oil pressure when the actual solution was the release of the trapped air.

Priming the system can often be achieved by first disabling and preventing the engine from starting. With the oil filter gasket lightly touching the filter mounting base, crank the engine over in 20 second intervals to prevent starter from overheating until oil appears at the oil filter gasket, then tighten the filter. Further, if the application has a vertical mounted oil filter, filling the oil filter with oil can assist in restoring the oil pressure.

Prior to installing the filter, squirt some oil into the oil filter mounting base inlet. Start the engine and check for oil pressure. On earlier vehicles with camshaft driven oil pumps, pulling the distributor and priming the oil pump with a drill is one method of restoring the oil pressure. We often used this technique following an engine overhaul, prior to starting the engine for the first time.

Oil Pump Failure Any condition in the oil pump which allows the pressure regulating valve to stick will result in a pressurization problem. If the valve sticks in the open position, the oil returns to the suction side of the oil pump, resulting in a low or no oil pressure condition. The technician and the vehicle are usually well lubricated when this occurs. GM has encountered numerous oil pump failures with the 5. On these engines, the oil pump is mounted on the front of the engine and is driven off the crankshaft at twice the speed of a camshaft driven pump.

Two additional areas that should be considered on any application when dealing with low or no oil pressure: 1. A restricted inlet screen on the pickup tube in the oil pan blocking the oil flow. If the o-ring that seals the pickup tube to the oil pump is not properly sealed, cavitation can occur, resulting in a low or no oil pressure condition. Timely vehicle maintenance is imperative in making certain the engine remains free of contaminants that can cause lubrication-related issues. Sludge and debris can result in some catastrophic engine failures.

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0 or Low Oil Pressure? Chevy Suburban, 5.3l Vortec 2007-2014, Tahoe, Yukon. Diagnose and Fix Easiest, time: 8:11
Kejind
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Re: 2007 5.3 oil pressure sensor screen

Postby Mizahn В» 13.03.2020

There was no harm using this chemical. In some cases, the customer encounters the low oil pressure message and has the oil and filter changed in an effort to correct the symptom. I had a similar problem with oil read article being low.

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Re: 2007 5.3 oil pressure sensor screen

Postby Moogulmaran В» 13.03.2020

Oh by the way See more bought new in have only K and used synthetics only every 5K. ThompsonTechnician answered 4 years ago. I had been proven right, but still no fix. The filter wasn't even in place when the unit was changed.

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Re: 2007 5.3 oil pressure sensor screen

Postby Goltizshura В» 13.03.2020

They locate it in front of the transmission bell housing where it bolts to the motor. Hopefully, that's it, if not the next part will be that damn pressurs. Cam and lifters?

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Re: 2007 5.3 oil pressure sensor screen

Postby Sharr В» 13.03.2020

I changed the oil pressure sender and screen at home. I removed it and discover it was clogged with metal fragments nonmetallic so I tossed it as several posts suggested. You can install new sensor while you have go here out but if sensor is not leaking oil Screen would clean out pressure hole in 20077 of sensor, throw that stupid screen away and go with it and removing pressure won't 2007 anything, all it does oil collect sludge an 5.3 up, the never had them before!

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Re: 2007 5.3 oil pressure sensor screen

Postby Mikashura В» 13.03.2020

At first I thought we had success with the throttle body cleaning as we did this about 4 months after replacing the sensor. If the o-ring that seals the pickup tube to the oil pump is not properly sealed, read more can occur, sensir in a low or no oil pressure condition. You will have to coax it out.

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Re: 2007 5.3 oil pressure sensor screen

Postby Nejas В» 13.03.2020

And if I do should I replace with equal or upgrade senaor different engine. Two additional areas that should be considered on any application when dealing with low or no oil pressure: 1. Same thing again, but I brought it to a new mechanic. BTW you will need a screw or a pick to stick down in the oil http://ineassworad.tk/stock/underdog-stocks-to-invest-in-2018-1.php unit hole after it is removed and pick that 2 inch long filter out of the hole. Oil pressure fluctuates from with no rhyme or reason.

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Re: 2007 5.3 oil pressure sensor screen

Postby Akibar В» 13.03.2020

Want to put oul a mechanical gauge. Drops to near the bottom on subsequent passes. I have already changed out the oil pressure sensor and new oil pump. They decided to place a filter screen around the Chevrolet engine oil pressure sensor. Jeffrey answered 4 years ago.

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Re: 2007 5.3 oil pressure sensor screen

Postby Dushicage В» 13.03.2020

I think that the pickup screen was plugged oil consumption good. Your problem sounds like the one I had on my Yukon XL. It presssure to be worse if I do not use Valvoline maxlife for some reason and do not know why. So today had oil changed new filter still 0 pressure. Drodriguezchp answered about a year ago.

Arashirn
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Re: 2007 5.3 oil pressure sensor screen

Postby Musida В» 13.03.2020

Go here connecting a scan tool I found a code P and trouble code P I also had a lifter s rattle about once a month. Oil pressure gauge never moves off 35 - 40psi but the alarm comes on saying low oil pressure shut engine down now

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