8 replies to this topic

[Cambelt]

Hello all I installed my oil gauge last week and everytime I start the car it shoots upto 60psi,so I bleed the line to get all the air out and then the gauge will be fine for a few hours but if you go to start the car after 2/3 hours I've got air bubbles in the line again ? I've tightened the fittings either end of the line but with the kit I noticed I had 3 washers but have only used the two either end of the line where would the third belong or is it just a spare ? What could it be ?

[ChopperHarris]

You do not have to bleed this pipe.

Don't worry about the extra washer, if it was meant to be there you would have oil all over the floor by now!

[Cambelt]

So just wait till it's warm and it will be fine ? I've still got the sensor so will know if any problems come with the pressure getting low

[mingy]

You do not need to bleed a mechanical fuel gauge, you will always get a certain amount of air bubbles in the oil line from the block to the gauge because when you stop the engine some of the oil in the gauge line will flow back to the block and as your engine breaths it allows air back into the oil line.

My oil pressure gauge has bubbles in it permanently and is accurate because, any air in the oil line is compressed when the engine is running thus,giving the same reading as if it were full of oil.

If it aint leaking then it,s just fine....... don,t worry.

[Cambelt]

Ah okay thankyou all wasn't 100% sure if it had to have none or not

[Tommyboy12]

Its also meant to shoot up to 60+psi. If it didnt your engine would be being starved of oil when the most wear occurs (when its cold). The pressure will drop off as the oil gets hot but you should still get at least 10psi per 1000rpm.

[dklawson]

As above, you do not need to bleed the air out of the oil pressure gauge lines.  Pressure is pressure regardless of whether it is air or fluid.  

[peter-b]

The little bubbles also act as a sort of damper for oil pulse/pressure fluctuations, saves wear in gauge unit, the tiny little pivot/gears. So bubbles are good, especially in beer or coke.

[Cambelt]

Drops to around 35-40 at 1000rpm when hot