View Full Version : 01E 6-Speed Conversions - Do You Run An External Oil Cooler?
Nollywood
10-21-2012, 12:32 PM
This will apply to users of the later 01E 6-speed tranny, with built-in oil pump, and oil cooler.
Normally in the original car it was fitted to, in this case, a '99 - '01 B5 S4, the oil cooler is incorporated in the main radiator, similar to the set-up used by many auto / tip models. When you decide to transplant this 01E into an A4, what do you do for an oil-cooler solution?
I'm running an external air-to-oil cooler, a 13-row Mocal unit, at the front lower (behind the bumper).
I've seen some folk simply make a loop for the oil feed and return on the tail of the trans, which in theory will be fine for normal road used.
What do you guys run?
catbed
10-21-2012, 12:58 PM
I have an 01.5 01E which I guess doesn't have an oil pump because there were no lines. I don't have one but I have seen them installed and was curious about it.
Nollywood
10-29-2012, 04:46 AM
I have an 01.5 01E which I guess doesn't have an oil pump because there were no lines. I don't have one but I have seen them installed and was curious about it.
That's interesting. All '00> 01E's I've seen run oil coolers. Is yours in an S4, or installed in an A4?
catbed
10-29-2012, 10:06 AM
That's interesting. All '00> 01E's I've seen run oil coolers. Is yours in an S4, or installed in an A4?
Came out of a B5S4, and is currently in my A4.
034Motorsport
10-29-2012, 10:09 AM
Engine oil cooler from a B5 S4 is just a basic exchange between oil and coolant temps. No external radiator for it beyond the actual radiator cooling the coolant. I don't see why your A4 would be any different. There is no transmission oil cooler for any manual transmissions from a B5 S4.
Only the RS4 01E has a diff gear pump in the transmission, which can run an external radiator if you want.
Nollywood
10-29-2012, 11:28 AM
Engine oil cooler from a B5 S4 is just a basic exchange between oil and coolant temps. No external radiator for it beyond the actual radiator cooling the coolant. I don't see why your A4 would be any different. There is no transmission oil cooler for any manual transmissions from a B5 S4.
Only the RS4 01E has a diff gear pump in the transmission, which can run an external radiator if you want.
Max, I think you misunderstood me. I'm not referring to the B5 S4's engine oil cooler in any way. I'm referring specifically to the B5 S4 TRANSMISSION oil cooler. I'm referring to the oil cooler built into the right-hand side of the radiator, in pretty much the same style as an auto trans car.
I'm not sure about North American cars, but UK B5 S4 have TRANSMISSION oil cooler on 2000> models.
Gumby
10-29-2012, 01:58 PM
To my knowledge the only North American cars with a trans cooler were either automatics, or allroads with an 01E. Every s4, or a6 I've ever dealt with didn't have one.
M-Hood
10-30-2012, 01:54 PM
Max, I think you misunderstood me. I'm not referring to the B5 S4's engine oil cooler in any way. I'm referring specifically to the B5 S4 TRANSMISSION oil cooler. I'm referring to the oil cooler built into the right-hand side of the radiator, in pretty much the same style as an auto trans car.
I'm not sure about North American cars, but UK B5 S4 have TRANSMISSION oil cooler on 2000> models.
If you read his reply again you will see that at first he talks about an engine cooler and then talks about the transmission cooler.
There is no transmission oil cooler for any manual transmissions from a B5 S4.
I haven't seen any 01E with a transmission cooler.
Do you have any links showing a 01E 6 speed trans cooler in the diagram?
walky_talky20
10-30-2012, 02:23 PM
For the skeptics among us (not naming names), behold 01E with factory oil cooler (integral to radiator):
http://i19.photobucket.com/albums/b154/walky_talky20/01E-oil-cooler.png
revolution337
10-30-2012, 02:58 PM
whaaa [confused]
never knew it
Nollywood
10-30-2012, 03:30 PM
If you read his reply again you will see that at first he talks about an engine cooler and then talks about the transmission cooler.
I haven't seen any 01E with a transmission cooler.
Do you have any links showing a 01E 6 speed trans cooler in the diagram?
Mike, I don't have to read Max's reply again - I understood perfectly what cooler he was referring to - ENGINE oil cooler.
As for me posting any links with an 01E 6-speed manual diagram, showing the TRANSMISSION oil cooler, no need, Walky has beaten me to it, and I'm glad he took the time to search for it.
Nollywood
10-30-2012, 03:38 PM
The radiator for the UK-spec B5 S4 (I refer to the UK, as I have no idea what NA cars ran) is the same part number for tip / auto models. So the same trans oil cooler was used for both.
walky_talky20
10-30-2012, 03:46 PM
This trans cooler business must have been used in some C5 models as well, because several of the 01E cooler hose part numbers start with "4B0". I'm pretty certain my mother's 2001 A6 2.7T 6MT Sedan does not have a cooler, perhaps none of the North American 01E's had these coolers. Maybe the Allroad?
Nollywood
10-30-2012, 04:01 PM
Yes, I would say the 6MT Allroad in all territories would run a transmission oil cooler.
ddillenger
10-30-2012, 04:03 PM
Neither my 00 a6 2.7t 6mt, nor my buddys 01 a6 2.7t 6mt, have external oil coolers. I don't recall ever seeing one in a us 01e.
KraemerSXED
10-30-2012, 04:07 PM
I am 99% sure my A4 with the tip has the transmission oil cooler. Same design as in that diagram. I even asked the Audi dealership about the small lines going into the radiator and they called them the transmission oil cooler lines. And, yes that's off topic. But am I to understand that I can just plug those lines going into my radiator as the O1E wont have them? Or have I missed a key point.
Nollywood
10-30-2012, 04:09 PM
Neither my 00 a6 2.7t 6mt, nor my buddys 01 a6 2.7t 6mt, have external oil coolers. I don't recall ever seeing one in a us 01e.
It's built into the right-hand side of the radiator. Worth having a look - it won't be immediatelt apparent, unless you're looking for it. There should be two rigid lines on the radiator - one at the top, the other at the bottom.
Nollywood
10-30-2012, 04:12 PM
I am 99% sure my A4 with the tip has the transmission oil cooler. Same design as in that diagram. I even asked the Audi dealership about the small lines going into the radiator and they called them the transmission oil cooler lines. And, yes that's off topic. But am I to understand that I can just plug those lines going into my radiator as the O1E wont have them? Or have I missed a key point.
It's possible your 01E will have banjo bolts plugging the two holes, at the tail of the tranny, I don't see why Audi would have two different casings. I can't speak for North American cars, but Euro ones definitely have the cooler.
If your 01E doesn't have the lines, you can certainly plug the holes in your radiator. It doesn't matter though, as there'll be nothing in that section of the radiator anyway.
I'll take a picture of one of my 01E's tomorrow, showing the oil pressure lines that link to the radiator.
Nollywood
10-30-2012, 04:40 PM
Here's a couple of photographs, showing the oil cooler lines on one of my 01E's. One banjo bolt's on the tail (TORSEN assembly) while the other's just below and to the rear the right-hand side output flange:
http://i768.photobucket.com/albums/xx329/NaijaGuy/Random/2012-10-30-762.jpg
http://i768.photobucket.com/albums/xx329/NaijaGuy/Random/2012-10-30-763.jpg
geeky
10-30-2012, 04:52 PM
my 6MT allroad DOES have the built in transmission cooler.
ianwpb
10-30-2012, 04:54 PM
my mother's 2001 A6 2.7T 6MT Sedan
I know it's off topic but... That's awesome!!!
M-Hood
10-30-2012, 04:55 PM
For the skeptics among us (not naming names), behold 01E with factory oil cooler (integral to radiator):
http://i19.photobucket.com/albums/b154/walky_talky20/01E-oil-cooler.png
What is being used to pump the fluid?
Nollywood
10-30-2012, 05:01 PM
What is being used to pump the fluid?
Rotary / gear-driven oil pump in the front section of the transmission (right-hand side).
Nollywood
10-30-2012, 05:07 PM
Here it is:
http://i768.photobucket.com/albums/xx329/NaijaGuy/Random/6MT.png
M-Hood
10-30-2012, 05:08 PM
Rotary / gear-driven oil pump in the front section of the transmission (right-hand side).
That is cool. I guess it would come in handy when doing 15+ dyno runs back to back. lol
v dub'n
10-30-2012, 08:27 PM
I have 2 01E's and just checked them both out they do not have provisions in the housing for this. I see that in the rear of the housing theres a flat spot where it can be drilled.
ddillenger
10-30-2012, 10:46 PM
Same here!
On another note, ALL TIPTRONICS will have trans coolers. As the fluid is used to cool the clutches/engage the drums, it is required to circulate/stay cool, whereas a manual can get by with just an oil bath.
034Motorsport
10-31-2012, 11:22 AM
It is extremely rare to find the transmission cooler in the USA. They never came on B5 S4's in the USA, unless the car was imported with a special factory option. Possible to find on an All-Road of course.
As I mentioned, the RS4 has the cooler factory. It is primarily there for the center differential.
I mentioned the engine oil cooler since plenty of people mistake that and you said you have a Mocal oil cooler. That's seriously overkill for a diff cooler.
The diff pump/cooler is really not needed unless you are planning on doing some endurance racing. We run it on our race car.
Nollywood
10-31-2012, 11:29 AM
^^^Max, Euro-spec B5 S4 01E all run the oil cooler, same as the B5 RS4
A Mocal 13-row Mocal oil cooler is overkill for the TORSEN differential? But how can you say that, when you don't know the car's primary function?
034Motorsport
10-31-2012, 11:40 AM
^^^Max, Euro-spec B5 S4 01E all run the oil cooler, same as the B5 RS4
A Mocal 13-row Mocal oil cooler is overkill for the TORSEN differential? But how can you say that, when you don't know the car's primary function?
I'm saying it is overkill because we have ran the stock USA 01E transmission with no diff cooler with over 500whp in serious racing conditions for long periods of time without issue or wear. The transmission cooler is nice, but even a simple cheap radiator will be more than enough. When you mentioned a 13 row Mocal cooler, I assumed this was your oil cooler.
You are going to be far under that power, in far more ideal conditions, and you aren't on the Autobahn. We run a small external cooler with our diff pump on our race car, and monitor temperatures. It's more peace of mind than necessary, is what I'm saying.
EDIT: I assumed this was for your daily driver A4. If this is for a race car, that is different, and would be worth mentioning in your very first post. However, I still stand by my comment that you don't need that much of a cooler. There really aren't many B5 race cars out there that are pushed to serious levels. We are one of the few companies still campaigning a B5 race car. I would focus more on cooling your power steering and engine oil. Remember that using the factory radiator to cool the transmission or engine means you can only cool as much as the temperature of the coolant. It also makes the job of cooling your motor more difficult.
On a race car, isolating those various items is more beneficial than combining them. My original comment concerning the stock engine oil cooler stands true for the same reasons; you're trying to cool with something that is already 200 degrees. Better than nothing, but marginally so. It is dual function and part of the use is to heat up the transmission oil.
PS. You can always just run a cooler under the vehicle somewhere as well, a simple radiator style that will receive some degree of airflow, if you don't want to route things all the way to the front of the vehicle. But I imagine you have some space on either side of the radiator.
Nollywood
06-12-2017, 07:46 AM
An old thread, but a very useful update:
Some Euro-spec non-S4 B5 models, with the 01E (2.5 V6 TDI) left the factory without a transmission oil cooler. If a factory towbar was specified from the factory, by the original buyer, a transmission oil cooler was factory fitted, along with a larger-capacity radiator, and larger cooling fan.
genecan
06-12-2017, 08:36 PM
Yes, it is an old thread, but the topic is still interesting for me too. For the time being we just put a bypass tube until I decide if I put a real oil cooler. Thing is that in the S4 it is actually temperature exchanger that would not cool the oil too much and that may be will happen with a real cooler and we do not know what would be the effect of this.
jaychen
12-07-2017, 03:56 AM
Curious if anyone know whats size and pitch the bolts are at the transmission so i can convert mine to -AN lines?
I'm interested in this as my gearbox locked up at the drag strip, but once it cooled off, shifted perfect.
Sounds like the oil pump Scotty retrofits is for the cooler? Has anyone done the retrofit? Is there a parts list floating around?