Oil related Gauges

[pr944may]

Recently I bought a 1977 targa Porsche. Got no books or explanation on this if someone can clarify this for me, I will appreciated it.
First: at left there is one dial that said: oel that at the button has a red segment and then white. When I start the engine it slowly goes to the top so that should be oil pressure. correct.
Second: This one said druck and has readings from 0 to 10.
1. What is this dial for
2. What reading it should be normal on it
3. When it should be taken in consideration: at idle or any rev?
It may sound silly for 911 owners but honesty I need this info.

[SC-targa]

The left one is oil level in your dry sump oil tank. After the oil is warmed up, it gives an indication of your oil level when your car idles.

The druck is your oil pressure.

Regards,

Jerry Kroeger

[javadog]

From left:

1st gauge - fuel and oil level
2nd gauge - oil temp and pressure.

Oil level is only accurate on level ground, engine at normal operating temp and at idle speed. All other times it will read low, if at all.

Oil temp should be at the first white mark when warmed up, or at the end of the white segment, depending on which exact gauge you have. In hotter weather, it will read a little higher. If the needle goes up past the horizontal level, towards the top of the gauge, you need more oil cooling.

Oil pressure is normally about 1 bar (gauge is 0-10 bar) per 1,000 rpm, when warm. It will be around 3-5 when cold and drop as the engine warms up.

JR

[pr944may]

Thanks a lot gentlemen

[Richard Burns]

Druk is your oil pressure in bars =1 bar 14.7 psi. If it is a Carrera 3 I am told that it is normal for the pressure to read at 1 bar per 1000revs when hot. With mine I was worried when it showed only 1 bar of pressure when hot and at idle. I have since been convinced that this is O K and that flow is more important.

[LSTR8R]

So new here. I had an engine/tranny swap completed (a 2.7 Sporto switched to a 3.0 Manual). For the first 600 miles, the oel guage and the oil pressure gauge needles flipped opposite each other--when at a stop light in neutral, the oel gauge was at the top, the one on the right was toward the bottom. When accelerating, they would switch--the oel would drop and the one on the right (is this the "druck?") would be up. After an oil change at 600 miles (black black), the oel needle is pegged beyond top at neutral/idle, and drops down to about 7/8 or 3/4 when in gear and accelerating. Essentially both gauges are always up. Should I take a little oil out?

[DRACO A5OG]

Welcome aboard.

The Oel should be checked after completely warmed up 190F degrees, idling on level ground at the dip stick. Should not go over the high mark, ideally in the middle of the two marks is recommended.

As far as the DRUCK, after completely warm/hot it should almost match your RPMs 1Bar = 1000 RPMs. When cold it will be higher or should be.

If Oel level at dip stick is too high, yes drain it to appropriate levels. Too much oel will suck oel into the intake.

Cheers,

Jim

[LSTR8R]

Okay, did that. The oel needle was comfortably just above halfway at warmed up idle and I'm pretty sure the dipstick showed just below middle (hard to tell, it was very clean oil and the edges of the dipstick had oil. The back of the dipstick had a horizontal oil mark which I took as the measurement. BUT, the flippy needle thing--is it okay for the oel needle to be beyond pegged as it sits at a stoplight, and to only drop a little bit when at 65 or so mph?

[Reiver]

Originally Posted by harrenst

Okay, did that. The oel needle was comfortably just above halfway at warmed up idle and I'm pretty sure the dipstick showed just below middle (hard to tell, it was very clean oil and the edges of the dipstick had oil. The back of the dipstick had a horizontal oil mark which I took as the measurement. BUT, the flippy needle thing--is it okay for the oel needle to be beyond pegged as it sits at a stoplight, and to only drop a little bit when at 65 or so mph?

That sounds like the sender/float in the oil tank may be sticking. The needle is 'flippy' when under way/driving (my oil is at the needle 1/2 mark as measured by me) the flippy gauge needle will usually ride just a bit above the red line when fully warm 190ish.
When at a stop it will register (depending on the length of the stop and level ground) about 1/2 to a bit higher.
It never registers a 'high' as you are indicating yours does. Jamming I'd guess in a high position as the oil sloshes around at speed or the sender needs to be adjusted.

[smadsen]

The dip stick method is always the more accurate check of oil level, however after you compare the dipstick reading to the Oel gauge reading several times you learn to interpolate the dipstick reading to the Oel gauge. They aren't always exactly the same.

It's important that the car be fully warmed up, the cooler thermostat open, and the car has sat at idle for at least one minute to equalize the level in the oil tank.

[DRACO A5OG]

Originally Posted by harrenst

The oel needle was comfortably just above halfway at warmed up idle and I'm pretty sure the dipstick showed just below middle (hard to tell, it was very clean oil and the edges of the dipstick had oil. The back of the dipstick had a horizontal oil mark which I took as the measurement. BUT, the flippy needle thing--is it okay for the oel needle to be beyond pegged as it sits at a stoplight, and to only drop a little bit when at 65 or so mph?

For now ignore the gauge for the Oel Level, it really is a visual guide and only accurate when car is HOT 190F degrees (88 Celsius), at idle on level ground.

Be patient and find a shaded area or well lighted area to get an accurate reading when hot.

If DRUCK is always "pegged" up then that means it is disconnected at the sensor but you say it is flipping up and down as you drive, correct? No it is not standard to have it pegged if it moves around at speed. It supposed to be at 1-1.5 bars when at stop/idle hot. When cold it will be around 3-4 bars to warm up.

How about posting a video so we are all talking about the same thing.

[Coastr]

Originally Posted by harrenst

So new here. I had an engine/tranny swap completed (a 2.7 Sporto switched to a 3.0 Manual). For the first 600 miles, the oel guage and the oil pressure gauge needles flipped opposite each other--when at a stop light in neutral, the oel gauge was at the top, the one on the right was toward the bottom. When accelerating, they would switch--the oel would drop and the one on the right (is this the "druck?") would be up. After an oil change at 600 miles (black black), the oel needle is pegged beyond top at neutral/idle, and drops down to about 7/8 or 3/4 when in gear and accelerating. Essentially both gauges are always up. Should I take a little oil out?

This behaviour is exactly correct, and yes you have overfilled. Check dipstick after idling for 30 seconds on level ground. Aim for halfway up stick. Ps you can’t take a little oil out, it comes out hot and in a rush.

The reason your left gauge reads high when idling is because that’s when the oil tank is full - idling = low demand for oil, tank is full. Druck reads low at idle because engine/oil pump spinning slowly = low demand/low pressure.

When you take off, engine spins faster, oil pump spins faster = higher pressure. Higher pressure increases draw from oil tank = lower level.