Higher temperature after LN engineering

[JFP in PA]

Originally Posted by Laredo

I read this post and a couple of them mention a change in temperature after LN retrofit installation.

Boxster 986 Engine Temperature - Pelican Parts Technical BBS

Couple of points:

1. The dash temp display in these cars is both woefully inaccurate and non-linear; it is more of a "hot or cold" idiot light replacement than an indication of the car's actual condition.
2. The link you listed notes the some of the cars that ran warmer had other issues as well, so their temp problem is probably unrelated to the LN swap.
3. I can think of no technically valid reason why changing the bearing would alter how hot the car runs.

[Perfectlap]

Originally Posted by JFP in PA

1. The dash temp display in these cars is both woefully inaccurate and non-linear; it is more of a "hot or cold" idiot light replacement than an indication of the car's actual condition.

How hot does it have to get to move the needle into warning territory?

[JFP in PA]

Originally Posted by Perfectlap

How hot does it have to get to move the needle into warning territory?

We never tried to find out after testing three different cars, side by side, all hooked up to Durametric systems to monitor the real temp. When the software said they were all at 180F, two dash gauges read lower, the other slightly higher than the first two, but none showed anywhere near the actual temps. When all three dash displays said "180", all three cars were actually running north of 205F, but none read the same actual temp. When I discussed this with two other shops, they concurred with what we had seen.

The dash gauge is simply not to be trusted for temperature accuracy, it should only be considered a "general indication" of how hot the engine is. As for when is the warning light supposed to flash, as you would expect of Porsche, the answer is complicated. From their literature on the subject:

Four functions of the coolant warning light:

1. Engine coolant level too low
— light flashes slowly (0.5 Hz)
2. Engine compartment temperature too high
— light flashes slowly (0.5 Hz) (engine compartment blower might be faulty)
3. Engine coolant temperature too high
— light is lit; pointer on the right
4. Temperature sensor at water outlet faulty
— light flashes rapidly (1 Hz); pointer on the right

Note
The temperature warning in point three is indicated if the conditions "engine coolant temperature too high" and "engine coolant level too low" are present simultaneously
(1Hz = 1 flash per second. 0.5Hz = 2 seconds per flash)

[TeamOxford]

This is incredible!

So the temp gauge is grossly inaccurate, the speedo is off ~4 MPH, and the oil gauge is not to be trusted.

Why did Porsche even bother installing a dash panel? I guess it was for the tach, because we need to AVOID certain rev ranges, like anything below 2000, 2200-2500, and 2700-3000. Especially 3000!

Sorry to vent, but I'm just sayin'..............

TO

[JFP in PA]

Originally Posted by TeamOxford

This is incredible!

So the temp gauge is grossly inaccurate, the speedo is off ~4 MPH, and the oil gauge is not to be trusted.

Why did Porsche even bother installing a dash panel? I guess it was for the tach, because we need to AVOID certain rev ranges, like anything below 2000, 2200-2500, and 2700-3000. Especially 3000!

Sorry to vent, but I'm just sayin'..............

TO

No, it is quite common. All OEM's set their speedo's to read 4-5 MPH higher than the car is really moving, supposedly to prevent lawsuits over speeding tickets, but in reality it probably has more to do with running the odometer faster to run out the warranty sooner. There was actually a class action lawsuit by Honda owners on this subject when it became common knowledge that most Honda's were off by over 7 MPH, which shaved months off their warranty coverage.

Same nonsense applies to dash gauges, very few are accurate in other makes either.

You want accurate gauges, go aftermarket. At the end of the day, just remember that you are discussing what temperature the car is when the dash says "180"; the reality is that none of these cars, unless they have an aftermarket thermostat in them, has a prayer of actually being at 180 when the dash says it is.............