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Home > Help Needed / General Tech Chat > Oil temp sensor

Yo-Han

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967 Posts
Member #: 3228
Post Whore

North of the Netherlands

I know most of you guys plug a sensor in the gearbox but I have one of these which simply bolts on:


I guess temperature reading will be a bit down compared to oil temp in gearbox, but will it be significant?
Was wondering what your thoughts are.

Cheers, Han

Dazed and Confused....


slater

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1030 Posts
Member #: 1291
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Suffolk / Birmingham

Looks good, the temp wont change greatly as it goes round the system.


viz139

108 Posts
Member #: 9182
Advanced Member

Can't remember the exact science but as the pressure in a liquid changes so does the temperature ( how a fridge works).Your at max pressure point as opposed to the sump at no pressure.MPi sensor is in the block.Which is the most relivent ,block or sump temp?


Turbo This..

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1767 Posts
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Previously josh4444

Australia, brisbane

though it was the friction of pumping that made heat not the actual pressure?

think of an air compressor as its filling the tank it makes heat then the tank holds the pressure and it cools off but stays pressurized

chose to get it as close to the block to get a better idea on what the engine will see not to fussed on sump temp as modern oils handle high temps fairly well

also can see if the thermostat and cooler are working hope to see it come up to temp faster and stay constant






slater

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1030 Posts
Member #: 1291
Post Whore

Suffolk / Birmingham

At the end of the day your just splitting hairs, the oil is in a closed loop so no matter where you sample it your getting a representative value of how hot it is.


Joe C

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12307 Posts
Member #: 565
Carlos Fandango

Burnham-on-Crouch, Essex

the temp change can be calculated

pV = kNT ,

where

p is the absolute pressure
V is the volume
N is the number of gas molecules
k is the Boltzmann constant (1.381×10−23 J·K−1 in SI units)
T is the temperature (K)

On 28th Aug, 2011 Kean said:
At the risk of being sigged...

Joe, do you have a photo of your tool?



http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1

https://joe1977.imgbb.com/



evolotion

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2909 Posts
Member #: 83
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Glasgow, Scotland

fridges work by phase change. if your changing your oil to a gaseous state, theres something wrong :) I think that location would be fine for oil temp, if anything it probably better represents the oil temp seen by working components than the temperature in the sump.

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.


Yo-Han

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967 Posts
Member #: 3228
Post Whore

North of the Netherlands

Thanks for your input guys, much appreciated.
Didn't think about pressurised vs non pressurised sample locations but eventhough in theory there is a relation between pressure and temp in my mind it shouldn't be significant.

I'll use this and see; save me one sump mod..
Must remember to ensure there is no airpocket though..

Cheers lads

Dazed and Confused....

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