Oil temperature keeps getting cooler (UPDATE!)

[Fat Goose]

Originally Posted by Thicsilverf30

So it was the thermostat and not the oil temperature sensor? My f80 m3 literally stays on 160 degrees all the way left of gauge all the time it's annoying. I can't even measure my oil sometimes due to it

Thermostat.

[tomlong]

That gauge in the instrument cluster does not measure your motor oil temperature. It measures your coolant/engine temperature.

Reason why I know is because my coolant thermostat was stuck open and that gauge in our instrument cluster never moved to the right at all. Effectively with it stuck open, the coolant flow never stopped and was over cooling the car which never allowed it to fully warmed up. Causing poor gas mileage and bogging. But yes, better than being stuck closed, which would result in overheating, as some shops told you.

[ThickM3]

Originally Posted by Fat Goose

Thermostat.

Which thermostat? I have one person telling me it's the coolant thermostat that's staying open and concocting the engine and oil.... then I have others saying it's the oil thermostat?

I need to know which so I can replace. My coolant Temps are like 200-210 most the time and oil is always like 160 or even 140 in sport and sport plus..

[krudmunk]

Originally Posted by tomlong

That gauge in the instrument cluster does not measure your motor oil temperature. It measures your coolant/engine temperature.

Reason why I know is because my coolant thermostat was stuck open and that gauge in our instrument cluster never moved to the right at all. Effectively with it stuck open, the coolant flow never stopped and was over cooling the car which never allowed it to fully warmed up. Causing poor gas mileage and bogging. But yes, better than being stuck closed, which would result in overheating, as some shops told you.

Oil temp is engine temp. I feel like oil temp takes lot longer to reach 220 after a fresh oil change. When I'm due for oil change, I notice it would reach 220 pretty quick.

[ThickM3]

Originally Posted by tomlong

That gauge in the instrument cluster does not measure your motor oil temperature. It measures your coolant/engine temperature.

Reason why I know is because my coolant thermostat was stuck open and that gauge in our instrument cluster never moved to the right at all. Effectively with it stuck open, the coolant flow never stopped and was over cooling the car which never allowed it to fully warmed up. Causing poor gas mileage and bogging. But yes, better than being stuck closed, which would result in overheating, as some shops told you.

OKAY SO YOUR COOLANT THERMOSTAT WAS STUCK OPEN..... WHAT WAS YOUR OIL AND COOLANT TEMPS EACH??

WAS COOLANT TEMP REALLY COLD LIKE 180? AND YOUR OIL LIKE 150? I THOUGHT THE GUAGE ON THE DASH IS LITERALLY OIL TEMPERATURE AS IT SAYS THE OIL SYMBOL IN IT.

How did you diagnose this?

[ThickM3]

Originally Posted by Fat Goose

Thermostat.

Please see the photos... car is constantly like 140-160 degrees on oil and coolant is like 200 something.

I can replace either part but I am hearing it's the coolant thermostat and then I heard it's the oil thermo. Is the oil gauge on dash controlled by the coolant?

Won't let me upload photo. I'll try in next post

[ThickM3]

Please see pictures. Need will stay there for like 2 seconds at like 165/170

[krudmunk]

Originally Posted by Thicsilverf30

Please see pictures. Need will stay there for like 2 seconds at like 165/170

I think you're right. Coolent temp is at 210 and oil temp is at 165

[Jeremy Billiel]

Originally Posted by krudmunk

Oil temp is engine temp. I feel like oil temp takes lot longer to reach 220 after a fresh oil change. When I'm due for oil change, I notice it would reach 220 pretty quick.

Originally Posted by krudmunk

Oil temp is engine temp. I feel like oil temp takes lot longer to reach 220 after a fresh oil change. When I'm due for oil change, I notice it would reach 220 pretty quick.

What are you talking about? Oil temp and engine (coolant) temps are not the same thing

[tomlong]

Everyone's an expert

[tomlong]

Originally Posted by Thicsilverf30

OKAY SO YOUR COOLANT THERMOSTAT WAS STUCK OPEN..... WHAT WAS YOUR OIL AND COOLANT TEMPS EACH??

WAS COOLANT TEMP REALLY COLD LIKE 180? AND YOUR OIL LIKE 150? I THOUGHT THE GUAGE ON THE DASH IS LITERALLY OIL TEMPERATURE AS IT SAYS THE OIL SYMBOL IN IT.

How did you diagnose this?

Motor oil temps fluctuated normally. So during normal driving it would hover between 200-225F while coolant and engine temps never exceed 153F when the thermostat was stuck open. I also received the following DTC code ID2008 "Characteristic field thermostat: is stuck open".

[ThickM3]

Originally Posted by tomlong

Motor oil temps fluctuated normally. So during normal driving it would hover between 200-225F while coolant and engine temps never exceed 153F when the thermostat was stuck open. I also received the following DTC code ID2008 "Characteristic field thermostat: is stuck open".

Well..... I have just changed out my oil thermostat with a brand new OEM unit.... installed and drove 100 miles.... still the same issue. Car won't read anything above 165 degrees.... always in the 130 to 160 range even after hard driving for an hour....

What do I do? What's next... this is literally ridiculous I can't get my oil temp up. BRAND NEW OEM thermostat from BMW as well

[ThickM3]

Originally Posted by Walmart Parking Lot

UPDATE: Scroll down a few posts and you will see a long post.

For some reason the average running temperature is much lower than my previous 2015 M4 (non ZCP). I just got a 2018 ZCP and it's running much cooler even when it's fully warmed up (50 min of driving and over 50 miles). I've tried Efficient and Sport mode and I've also tried driving it hard but it doesn't change anything.

Please see the picture. The white arrow is where it is at when I'm driving and it's fully warmed up. The red line is where it is at when I come to a stop and I'm idling at a red light fully warmed up. The green arrow is where my 2015 used to be when it was fully warmed up (driving and idling).

I'm at the dealership and they're telling me it's no big deal since it's not overheating. There's got to be something wrong. What's wrong with it?

Can anyone else chime in? I replaced oil thermostat and still have the same issue...

[tomlong]

Originally Posted by Thicsilverf30

Well..... I have just changed out my oil thermostat with a brand new OEM unit.... installed and drove 100 miles.... still the same issue. Car won't read anything above 165 degrees.... always in the 130 to 160 range even after hard driving for an hour....

What do I do? What's next... this is literally ridiculous I can't get my oil temp up. BRAND NEW OEM thermostat from BMW as well

You need to change out your coolant thermostat like I said earlier. Not your motor oil thermostat. Coolant thermostat looks like this.

[McBobby Jr]

Originally Posted by Walmart Parking Lot

UPDATE: Scroll down a few posts and you will see a long post.

For some reason the average running temperature is much lower than my previous 2015 M4 (non ZCP). I just got a 2018 ZCP and it's running much cooler even when it's fully warmed up (50 min of driving and over 50 miles). I've tried Efficient and Sport mode and I've also tried driving it hard but it doesn't change anything.

Please see the picture. The white arrow is where it is at when I'm driving and it's fully warmed up. The [COLOR="Red"]red[/COLOR] line is where it is at when I come to a stop and I'm idling at a red light fully warmed up. The [COLOR="SeaGreen"]green[/COLOR] arrow is where my 2015 used to be when it was fully warmed up (driving and idling).

I'm at the dealership and they're telling me it's no big deal since it's not overheating. There's got to be something wrong. What's wrong with it?

So, is this gauge the coolant temperature gauge, or the oil temperature gauge? I see some different responses.

[ThickM3]

Originally Posted by McBobby Jr

So, is this gauge the coolant temperature gauge, or the oil temperature gauge? I see some different responses.

It's oil... you can see my digital read oit read the same... thats oil

[ThickM3]

Originally Posted by tomlong

You need to change out your coolant thermostat like I said earlier. Not your motor oil thermostat. Coolant thermostat looks like this.

Where is this located and how do you change it?

[McBobby Jr]

Originally Posted by Thicsilverf30

It's oil... you can see my digital read oit read the same... thats oil

I saw your post and figured that, but just needed some clarification.

[ThickM3]

Replaced oil/coolant sensor on front near oil housing... still no change. Wtf

[Judd]

I'm pretty sure my oil thermostat is stuck open also. Letting the vehicle sit and it will read 85c-95c, when driving it will drop down to 70-75c on hot summer days. On colder days in in eastern canda my engine oil temp will never exceed 75c.

Does anyone have a decent video/Guide on how to actually change out the thermostat. He see lost of videos on the Mosselman unit.

Thank you

[Walmart Parking Lot]

Originally Posted by Thicsilverf30

Replaced oil/coolant sensor on front near oil housing... still no change. Wtf

Replace the entire oil thermostat

[Judd]

Originally Posted by Judd

I'm pretty sure my oil thermostat is stuck open also. Letting the vehicle sit and it will read 85c-95c, when driving it will drop down to 70-75c on hot summer days. On colder days in in eastern canda my engine oil temp will never exceed 75c.

Does anyone have a decent video/Guide on how to actually change out the thermostat. He see lost of videos on the Mosselman unit.

Thank you

Repalced my Engine oil thermostat, situation normal. It's not the engine coolant thermostat.