Oil Pressure Guage Problem

[Zazur]

Hi guys

 

While driving the car today suddenly noticed the oil pressure guage was reading a pressure off the scale of more than 120.

 

When the ignition is switched on but engine not running the needle sits at just above 60 and then when started goes above 120, the needle still appears to be moving up and down, just off the dial and the movement is restricted I guess due to the needle movement restrictions.

 

Has anyone any ideas please???

[H5]

Not heard of that before - tried an ECU reset?

[BulletMagnet]

Ah, so you solved your auto gearbox problem then.

Maybe it's a knock on effect from that, although I do not see where the connection would be.

[Stew]

This is maybe a silly question but how does the level of oil in the system affect pressure?

[BulletMagnet]

Oil pressure

From Wikipedia, the free encyclopedia

 

Oil pressure is an important factor in the longevity of most internal combustion engines. With a forced lubrication system (invented by Frederick Lanchester), oil is picked up by an oil pump and forced through oil galleries (drillings) into the most highly-stressed bearings, such as the main bearings, big ends and camshaft bearings. Other components such as cam lobes and cylinder walls are lubricated by oil jets.

 

Sufficient oil pressure ensures that the metal of the rotating shaft (journal) and the bearing shell can never touch, and wear is therefore confined to initial start-up and shutdown. The oil pressure, combined with the rotation of the shaft, also hydrodynamically centres the journal in its shell.

 

As bearing clearance increases due to wear and the oil pump declines in efficiency with age, oil pressure falls. Eventually it may be insufficient to protect the bearings, especially if the engine is "lugged" at low rpm. Some engines include an oil pressure gauge which shows the pressure at any given time, while others just employ a warning light which shows when the pressure is insufficient. The sensor for either type is usually mounted near the oil filter of the engine, just after the oil pump.

 

Oil pressure is higher when the engine is cold due to the increased viscosity of the oil, and also increases with engine speed. Oil pressure is lowest under hot idling conditions, and the minimum pressure allowed by the manufacturer's tolerances is usually given at this point.

 

Excessive oil pressure may indicate a blocked filter, blocked oil gallery or the wrong grade of oil.

 

Some oil pressure gauges, especially on older model cars, will be labeled with the term "druck" or "drucks". Most newer model cars will either omit oil pressure gauges, substituting status lights, or will label the gauge with a pictograph.

 

So one would think that the level of oil affects the pressure as a whole within a sealed environment.

 

I'm no mechanic, so I could be totally wrong

[Stew]

So one would think that the level of oil affects the pressure as a whole within a sealed environment.

 

 

I was wondering about in the Zed specifically as I was unsure but I think you know what I was getting at....

 

 

I know a little about fluid, pressures, temps and oil but the stuff I know about is a bit different to stuff found in a car. :lol:

 

 

Not a bad wiki entry though.

[Zazur]

Ah, so you solved your auto gearbox problem then.

Maybe it's a knock on effect from that, although I do not see where the connection would be.

 

The gearbox problem was fixed this morning.

I took out the guage pod out to have a look but nothing obvious but now the oil guage is off the scale when the ignition is switched on so now the guage is useless for any type of reading.

The oil level is at the max mark where it always has been.

Suspect the guage could be faulty or the sender has gone loopy

[Chris`I]

I would guess the sender has gone mad. Maybe try and get a new sender. Dont know how hard they are to fit, but Alex may be able to lend you one to see if it solves your problem.