What are the temps on oil gauge markings?

[jess5engine]

I've got the oil temp gauge with just the white and red markings as opposed to the gauge with numbers. Will someone please clue me in to what the markings on the gauge approximate to if I had the gauge with numbers? TIA

p.s. I will be making the upgrade as soon I as I find a good used one.

[fintstone]

try this link:
Carrera oil temp question

[speeder]

There is no need to "upgrade", your guage has numbers on it and is just as accurate as an old one. The #s are just hidden on the edge behind the bezzel. They are as follows:

Top of wide white band on bottom= 60deg.C(140F)

1st white slash @ 8 o'clock=90deg.C(194F)

2nd white mark @ 10 o'clock=120deg.C(250F)

beginning of red=150deg.C(300F)

[Jack Olsen]

Are all pre-89 non-marked gauges the same, in terms of marks/temps? Did the corresponding numbers shift with the 964 or 993?

[speeder]

Originally posted by JackOlsen
Are all pre-89 non-marked gauges the same, in terms of marks/temps? Did the corresponding numbers shift with the 964 or 993?

Not sure about the newer cars, sure way to find out is w/ a flashlight and head scrunched behind steering wheel. (Not applicable for those w/ quick-release wheels).

They all have numbers on them and are calibrated.

[jess5engine]

Thanks for the tip guys! Now where did I put that flashlight...

[Early_S_Man]

From a post just yesterday ...

photoshop/temp help needed....

Those °F numbers posted above are approximate ...

60°C = 140°F
90°C = 194°F
120°C = 248°F
150°C = 302°F

Note that the 60°C point is at is at the top edge of the bottom white band, and that the 150°C point is at the bottom of the red band! The 90°C and 120°C points are at the midpoints of the middle white marks.

The full upper third of that unmarked scale is useless, since the factory 'spec book' redline for oil temperature is 130°C, or 266°F ... just about one needle width above the second white mark!!!
__________________

[vash]

i get the funny feeling that the sender unit associated with the un-numbered gauge will work perfectly with my numbered gauge with a range of 80 to 340 degrees. has anyone ever looked at the sender? what temp degree is stamped on the side?

[Early_S_Man]

You're probably right, Cliff ... but since they only installed that gauge for '77 models, I believe ... who knows??? Or cares, for that matter, re: my comments above!

What I want to know is ... any market for recalibrated gauge with 260°F mark at the top of the range, i.e., an actual, useful, oil temp gauge???

[vash]

no kidding! warren i actually talked to a mechanic that worked in a porsche dealership for many years. he said that the extra headroom on all these gauges were only for the consumers head(games). they didnt want a bunch of drivers freaking out that their cars were running so hot, so they just made the range higher. he said even one time, the customers were complaining that the cars were running hot, so the factory just came out with a gauge that went up to 350 or something. i opened my door and said, "like that?".
so i guess the damn factory thinks we are simple. i actually liked my original wider ranged gauge. the operating temp of 190 to 210 range is more in the middle of the gauge zone. the new gauge only moves about .25 of a inch like you mentioned. those german engineers were crafty. i guess it is like using a yard stick with only inch increments to measure something that never gets over 1 foot long.

[KTL]

Here's a picture just for fun



[size=0.1] Sorry 'bout the double post. Had to fix my picture[/size]

[goliver]

My 79SC only has temp numbers way over to the side for the first white mark and then the red mark.

Cheers,

Geoff

[speeder]

At least they are better than temp guages in newer cars that always sit right in the middle, unless motor is about to explode, then they peg for 3 seconds probably before you hear "BOOM".

The oil guage in 911s is accurate, basically 9 o'clock (level) or slightly lower is fine for a constant temp. Most well-cooled 911s w/ auxiliary oil coolers run closer to the 90deg. mark, (~200F), under normal use, a little higher if run hard/hot day/etc...

[Early_S_Man]

So, Geoff ... what are the numbers at those points?

1977 - 79 was probably the nadir of morale in the 911 engineering group ... the peak of the 'water-cooled future' paranoia was ever-present, and nobody was sure just how long 911 production would last! Fortunately, the market had different ideas, but the oil temp gauge never got any more serious attention. The idea of putting a 340°F temp gauge [essentially what the gauge used WAS until end of 1989 production] in a 911 to make buyers complacent about excessive oil temps ... well, let's just say that person wouldn't have stayed employed very long under Dr. Piech!!!

[goliver]

Hi Warren,

I'll check at my lunch break and post.

Cheers,

Geoff

[goliver]

Just checked at my lunch break. Ir you look across at the top of the lower box it reads 90 degrees. The only other mark aligns with the bottom of the red at the top of the gauge and it reads 150.

My car under normal driving conditions at around 80 degrees farenheit hovers right about the 8:00 o'clock to 8:30 range. If I use the A/C it goes about three needle widths above this point. This is during my normal commute which consists of stop and go for 8 miles. If i'm on the highway the needle doesn't vary much lower, maybe two needle widths at most.


Cheers,

Geoff

[Early_S_Man]

Thanks, Geoff!

Another good data point for the database ...

[Jon Hile]

...how do those temps relate to oil viscosity? Jesse, sorry if I hijacked your post, I certainly don't mean to do so. The question seemed relevant to your initial post.

jon