Skip the auto shop - Our mechanics make house calls
  1. Home
  2. Articles
  3. Symptoms of a Bad or Failing High Pressure Safety Valve

Symptoms of a Bad or Failing High Pressure Safety Valve

high pressure safety valve

All internal combustion engines rely on some form of engine lubrication to keep the metal components of the engine from overheating and becoming damaged due to metal on metal contact. The engine oil pump is responsible for pressurizing and pumping engine oil to the various places throughout the engine where lubrication is required. It is the job of the high pressure safety valve to regulate the oil pressure and make sure that it is always at a safe level, never too high or too low, and always at the correct pressure.

The high pressure safety valve is usually located near the oil pump, and is not usually considered routine maintenance to service, however it can sometimes fail and cause mechanical issues with the engine. Usually a bad or failing high pressure safety valve will produce a few symptoms that can alert the driver of a potential issue.

1. Oil Pressure Light comes on

One of the most common symptoms of an issue with the high pressure safety valve is an illuminated oil light. If the high pressure safety valve fails or has an issue, the engine oil pressure may be disrupted. A change in the oil pressure, especially if unsafe, will be detected by the oil pressure switch, which will set off the Oil Pressure Light.

2. Increased engine noise

Another symptom of an issue with the vehicle’s high pressure safety valve is increased engine noise. If the high pressure safety valve fails and oil pressure is compromised it may be possible for the engine to be starved of oil in certain places. Aside from the potential of serious engine damage due to oil starvation, this will cause the engine to produce loud mechanical noises, such as whirring, grinding, or scraping. If you suddenly notice your engine making loud mechanical sounds that change according to engine speed stop the engine and have the vehicle looked at to prevent the potential of serious engine damage.

3. Sudden changes in oil pressure

Another symptom of a faulty high pressure safety valve, one for vehicles equipped with oil pressure gauges, is sudden changes in oil pressure. The high pressure safety valve is meant to regulate the oil pressure, making sure that it stays at a safe level throughout the engine, at both high and low engine speeds. If the safety valve fails, the oil pressure and flow may be disrupted, which may lead to sudden changes in oil pressure. The oil pressure gauge may suddenly change from being in the center, to high or low, or may fluctuate erratically.

High pressure safety valve failure is not generally considered a common issue, however problems can occur under certain circumstances. If you suspect that your engine’s high pressure safety valve may be having an issue, have the vehicle inspected by a professional technician, such as one from YourMechanic, to determine if the valve should be replaced.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Still not sure about your car's issue?
Diagnose your car
What kind of issue are you experiencing?
Brakes are squeaking
Car is not starting
Car is overheating
Car is shaking (vibrating)
Fluids are leaking
Heating and A/C
Smoke or steam is coming out of the car
Warning light is on
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

How to Buy Fuel Treatments
Adding a fuel additive to your gas tank when you fill up is one way to clean vital engine parts of deposits, improve the performance of your engine,...
Insurance Requirements for Car Registration in Kentucky
The Kentucky Transportation Cabinet requires that all drivers in Kentucky carry liability automotive insurance, or “financial responsibility” in order to operate a vehicle legally and maintain vehicle...
How to Get a Louisiana Driver's Permit
s licensing program. The first step in this program is to obtain...


Related questions

Q: When I start my van the gauge will bounce up and down

This sounds like most likely an oil pressure sending unit problem. These vans are somewhat known for this problem. The sending unit sits down near the oil filter and will cause the gauge to read intermittently when the sending unit...

Q: Truck has a oil pressure low light

Hello. Most of the time when this light comes on with an engine noise like this it is caused by a failing oil pump. If the pump fails internally then this will occur. It can also be caused by a...

Q: How much does it cost for Camshaft cover and Valve cover gaskets, parts and labor?

Billing question sent to CS for the cost of replacing the valve cover and camshaft cover gaskets with the cost of labor on a 2008 Mercedes-Benz CLK350 with a V6-3.5L engine.