Auto Oil Temp

[disco_ute]

I fitted a madman monitoring systems to my 300tdi auto ute last week and took it for a drive in the hills yesterday. I have hooked the oil temp sender in to the auto cooler lines when i was giving it a little bit of stick up the hills i notice the engine temp got about 110C - 115C and the auto temp was at around 140C - 146C i would hate to think what temp the auto would get to if it were a 40 deg day and i was towing a caravan.

What temps should the auto get too? engine temp i am not worried about as it peaked a few time but due to the location of the sender (in the top bleed screw) i can understand why it would fluctuate. If this is the case and the auto see temps that high then i will have to get a new sender this one only reads to 150 :(

Mick

[Hally]

I have my sensor fitted to the sump of the auto and when driving really hard on soft sand i would be lucky to get it over 100 deg c I hope thats not the return line readings you're getting I would think thats pretty hot what oil are you running ?

[harry]

so, when you didn't have the temp gauge, were you worried about what the temp was?
so what's changed.

i find this problem with aircraft owners, as soon as we fit an engine monitoring system the owner has more problems we are invited to fix - when there is really nothing wrong at all - fit more gauges, we make more money chasing faults that are not there on a standard installation.

[sclarke]

Problem with Auto's running thru the radiator as cooling....

The Radiator PRE HEATS the oil on the Tranny.... and the Tranny then makes the car run hotter....

If you run just a tranny cooler and a good big one, then you will find the temp drop....

[Slunnie]

It sounds very hot to me.
140-146C works out to 284-295F



The temps and distances in this chart are Farenheight and miles.
https://www.aulro.com/afvb/images/imported/2008/04/150.jpg

[Pedro_The_Swift]

so would the auto sump be the best spot to place the sensor?

[disco_ute]

I am running the right oil for the auto.

I replaced the std sender switch with the new one so it's on the 'from the auto line' so i would be hotter then on the other side of the cooler i am going to fit a t piece so i can run both senders at the same time and see if the std sender switch faults.

as far as monitoring i agree but I like to look at the numbers it's fun... and way more interesting then the road :P

[disco_ute]

so would the auto sump be the best spot to place the sensor?

not if you are going to use it off road i would dare say it would be torn off and then you are in a whole world of pain!

[Blknight.aus]

If your reading the supply line to the cooler your reading the oil temp as it comes out of the torque converter in most cases IMHO the best place is in the sump up the front behind the bellhousing or down the back where its out of the line of fire of everything and in theory nice and safe.

[Slunnie]

Hey, here are some words linked to from the Ashcroft website. Some very interesting reading and comment on temps in the pan and also from the torque converter.

Transmission Oil (http://www.digi-panel.com/digidevicesweb/trannyoil.htm)

[George130]

Mine was in the sump.
Highway cruising would be anywhere up to 100F
Bumper to bumper stop start traffic up to 220F
Big slow hills could push it up to 240F

[disco_ute]

Hey, here are some words linked to from the Ashcroft website. Some very interesting reading and comment on temps in the pan and also from the torque converter.

Transmission Oil (http://www.digi-panel.com/digidevicesweb/trannyoil.htm)

ok so my auto did get very hot! now i get to go find out why.... yay :(

[disco_ute]

It seems that i have fixed the problem. I went from Transmax M to CASTROL TQF and changed the filter i also relocated my temp sender to a 1/4 t piece and re installed the factory temp switch in to 1/8 fittings so they dont touch and dont protrude in to the cooler line so now i have both running. I also broke the ally cooler unit (dont ask) so the old dunny brush from the v8 rangie went in and after similar driving to last week with a few steep very rocky and rutted tracks the temp peaked at 74 deg and runs at about 34 - 40 at normal driving. So i am happy with that!

next question is what temp should the engine operate at at? it's a 300tdi

Mick

[JohnE]

interesting i wonder how hot mine got when i tried towing the swb home.I wonder what the temp needs to be to set off the transmission over heat light?

But did changing the ATF make it go cooler or the positioning of the sender units. If its by using TQF that would be a plus, but

I am inclined to agree with harry if there was no problem to start with, why fit the sensors in the first place, over and above the standard one.

aside from that a very interesting project.


john

[rick130]

next question is what temp should the engine operate at at? it's a 300tdi

Mick

t/stat starts to open at 87*C, mine tends to run around the 92* mark mostly, although just running around town in this cooler weather it sits just below 90*.
Climbing any sort of hill it goes straight up to 95-96*, and in stinking hot weather working hard will go over 100*

[loanrangie]

It seems that i have fixed the problem. I went from Transmax M to CASTROL TQF and changed the filter i also relocated my temp sender to a 1/4 t piece and re installed the factory temp switch in to 1/8 fittings so they dont touch and dont protrude in to the cooler line so now i have both running. I also broke the ally cooler unit (dont ask) so the old dunny brush from the v8 rangie went in and after similar driving to last week with a few steep very rocky and rutted tracks the temp peaked at 74 deg and runs at about 34 - 40 at normal driving. So i am happy with that!

next question is what temp should the engine operate at at? it's a 300tdi

Mick

Bout time you brought that thing over so i can check it out !
Was the dunny brush hard to fit ? i wouldnt mind fitting a bigger cooler just to help prolong the auto's life.

[B92 8NW]

Did you manage to get that t/stat housing sensor to stop leaking?

Where did the 1/4 T piece come from? Im looking for one to go in the trans line, did you just chop the hose and stick it in?


Bout time you brought that thing over so i can check it out !
Was the dunny brush hard to fit ? i wouldnt mind fitting a bigger cooler just to help prolong the auto's life.

I was looking at these last week:

Davies Craig - Coolers - Catalogue (http://www.daviescraig.com.au/main/display.asp?pid=28) - seems a model 678 is called for. $148... seems reasonable enough. The question is, would a small thermatic fan be overkill?

http://www.performancecentral.com.au/catalog/index.php?cPath=28_32&osCsid=d7tsjlb79cvujqua0ajpqglub7

[Slunnie]

If you really want the Davis Craig then you are welcome to mine which is still in the box for half price. I don't run it because of the high pressures that the ZF gearbox runs through the ATF cooler lines and require a pressure rated cooler. The HiTech one looks good, but I really don't know anything about it.
If its running that hot then I'd be checking that the ATF cooler thats in it is clear from mud etc.

[B92 8NW]

If you really want the Davis Craig then you are welcome to mine which is still in the box for half price. I don't run it because of the high pressures that the ZF gearbox runs through the ATF cooler lines and require a pressure rated cooler. The HiTech one looks good, but I really don't know anything about it.
If its running that hot then I'd be checking that the ATF cooler thats in it is clear from mud etc.

Ok bugger that idea. The HiTech one is rated to 200psi and the line pressures in reverse can exceed 190...

And just like that the plan is shelved:D.

[PAT303]

I put one of the Cat heat senser strips on the head of my Tdi and after a good uphill run went from 90* to 110* and then it went off the chart 140*+ after it sat for awhile. Pat

[Tombie]

Earls make nice Oil / Trans coolers :D Watch your wallet though!

[Slunnie]

Ok bugger that idea. The HiTech one is rated to 200psi and the line pressures in reverse can exceed 190...

And just like that the plan is shelved:D.
Are the pressures that high? I thought they were arounf 115-120psi. I've done a lot of damage with blowing lines etc from the ATF pressure, though the additional ATF cooler I now have from Davis Performance has been faultless, having been in for about 1 year now.

[disco_ute]

interesting i wonder how hot mine got when i tried towing the swb home.I wonder what the temp needs to be to set off the transmission over heat light?

But did changing the ATF make it go cooler or the positioning of the sender units. If its by using TQF that would be a plus, but

I am inclined to agree with harry if there was no problem to start with, why fit the sensors in the first place, over and above the standard one.

aside from that a very interesting project.


john

150 deg will set the std sender off but it could be yr t-case or yr auto :mad:

changing the position of the sender units would have made a difference for sure! Did the TQF make a difference YES gear changes are smoother!

Mick

[disco_ute]

t/stat starts to open at 87*C, mine tends to run around the 92* mark mostly, although just running around town in this cooler weather it sits just below 90*.
Climbing any sort of hill it goes straight up to 95-96*, and in stinking hot weather working hard will go over 100*

interesting mine is getting over 120 deg C! it's also maxing out the range the unit will read :mad: I think it's reading from the wrong spot as the temp is all over the place as the t stat opens and closes really ****s me as the alarm goes off all the time. and i think my viscus fan is not locking up as i dont hear it when the temp reads hot anyway gauge on the dash says everything i OK so i am kind of ignoring the unit for the time being..... thats a job for the weekend to find out whats going on

Mick

[disco_ute]

Bout time you brought that thing over so i can check it out !
Was the dunny brush hard to fit ? i wouldnt mind fitting a bigger cooler just to help prolong the auto's life.

whats wrong with yr legs? :p

dunny brush has the same fittings and same holes so yeah very easy to install but i would have thought the ally cooler was better it seems much bigger. Sitting on the freeway tonight in the rain the auto was at a 22 Deg C!! something is working well!

[disco_ute]

Did you manage to get that t/stat housing sensor to stop leaking?

Where did the 1/4 T piece come from? Im looking for one to go in the trans line, did you just chop the hose and stick it in?



I was looking at these last week:

Davies Craig - Coolers - Catalogue (http://www.daviescraig.com.au/main/display.asp?pid=28) - seems a model 678 is called for. $148... seems reasonable enough. The question is, would a small thermatic fan be overkill?

http://www.performancecentral.com.au/catalog/index.php?cPath=28_32&osCsid=d7tsjlb79cvujqua0ajpqglub7



good old stag stopped the t stat from leaking! great stuff! fitting all std from pirtek and drilled and tapped everything at work to 1/4.

good luck with the coolers as the fitting are not std from pirtek or the like so it would have to be a cu$tum job but you can over cool the auto you cant win!

[Pedro_The_Swift]

150 deg will set the std sender off but it could be yr t-case or yr auto :mad:

changing the position of the sender units would have made a difference for sure! Did the TQF make a difference YES gear changes are smoother!
Mick


its funny how I said that when I went to Transmax Z and no-one believed me,,,,
;):D

[disco_ute]

I do! :cool:

[Pedro_The_Swift]

Are the pressures that high? I thought they were arounf 115-120psi. I've done a lot of damage with blowing lines etc from the ATF pressure, though the additional ATF cooler I now have from Davis Performance has been faultless, having been in for about 1 year now.

any chance of a pic of its location Slunnie??

yea,, I know its cold outside-- any snow yet?
:p

[Slunnie]

any chance of a pic of its location Slunnie??

yea,, I know its cold outside-- any snow yet?
:p
I'll take a pic of where it's located, I don't seem to have one on file that I can put my hand on right now.

I'd take a pic now but.... :D

The first snow was just over a week ago. That was a chilli few days. It's probably cooled of to the high 20's up you way now! :lol2:

[disco_ute]

I sorted the coolant temp issue.... i moved the sender to the top of the radiator and now the figures are much more realistic and a lot more stable!

did over 150 click in the bush today up some step fast gravel roads and the coolant and auto oil temp all stayed under 80 deg

Mick

[Diff]

What part of the auto lines runs near the top of the radiator? I have been interestedin this thread as I just cooked the auto in the TDI. One of the reasons the auto shop said it may have got hot was that there was insufficent earth to the box and it may have earthed through the kickdown cable which then melted, stopped the box changing correctly and the damage was done.

What is the gauge that you installed? Is it the type that can do exhaust temp ect? I was thinking about such an investment but also thought about Harry's comments. I don't want to have boxed rebuilt every 3 years which is happening now.

[disco_ute]

What part of the auto lines runs near the top of the radiator? I have been interestedin this thread as I just cooked the auto in the TDI. One of the reasons the auto shop said it may have got hot was that there was insufficent earth to the box and it may have earthed through the kickdown cable which then melted, stopped the box changing correctly and the damage was done.

What is the gauge that you installed? Is it the type that can do exhaust temp ect? I was thinking about such an investment but also thought about Harry's comments. I don't want to have boxed rebuilt every 3 years which is happening now.

no part of the auto line runs near the top of the radiator I have been playing with 2 systems of the disco in this thread 1 being the auto temp and the other being the coolant temp it was the coolant temp that i was talking about that runs on top of the radiator. I installed a http://www.madman.co.za (http://www.madman.co.za/) EMS system.

HTH

Mick

[Slunnie]

any chance of a pic of its location Slunnie??

yea,, I know its cold outside-- any snow yet?
:p
No problemo. Here it is. It's mounted in behind the grill in series with the factory cooler using pressure fittings.

https://www.aulro.com/afvb/images/imported/2017/03/326.jpg