Can I use my transmission cooler for engine oil? - Rennlist Discussion Forums

Log In 


Can I use my transmission cooler for engine oil?

Reply
 
Thread Tools Search this Thread
Old 12-17-2006, 05:14 PM   #1
Vlocity
Addict
Rennlist Member
Thread Starter
 
Vlocity's Avatar
 
Join Date: Dec 2003
Location: Northwest, Ohio
Posts: 1,321
Default Can I use my transmission cooler for engine oil?

Hello all:

I converted my automatic car to a 5 speed some years ago and still have the stock radiator with an automatic transmission side.

While I haven't had any overheating issues since my twinscrew install I'd like to take advantage of any additional capacity that I can.

So, my question is; would it be possible and advisable to make an extra set of lines and use the transmisssion cooler side of my radiator for additional engine oil cooling?

If the above is possible, would I sacrifice the water cooling ability of the radiator by adding back in this extra load.

Thanks,

Ken
Vlocity is offline   Reply With Quote
Old 12-17-2006, 06:31 PM   #2
marton
Super User
 
marton's Avatar
 
Join Date: Nov 2001
Location: zürich, switzerland
Posts: 2,233
Default

HTML Code:
would it be possible and advisable to make an extra set of lines 
and use the transmisssion cooler side
Looks like a good idea. I assume you would run the oil through the first cooler & then through the second cooler and then back to the motor? I do not see any other easy way to do it?

HTML Code:
would I sacrifice the water cooling ability of the radiator
I do not see why it would make a big difference, radiator is designed to cool the transmission as well as the standard engine.

Marton
marton is offline   Reply With Quote
Old 12-17-2006, 06:40 PM   #3
Vlocity
Addict
Rennlist Member
Thread Starter
 
Vlocity's Avatar
 
Join Date: Dec 2003
Location: Northwest, Ohio
Posts: 1,321
Default

Thanks Marton.....
Yes that is exactly what I envisioned.....not much of a run needed for the lines.

Thanks,

Ken
Vlocity is offline   Reply With Quote
Old 12-17-2006, 06:42 PM   #4
ZEUS+
Addict
Rennlist Member
 
ZEUS+'s Avatar
 
Join Date: Aug 2006
Location: Manchester,NH
Posts: 1,202
Default

Oil cooler hoses to rad are larger than trans. It is possible to slow down oil flow.
ZEUS+ is offline   Reply With Quote
Old 12-17-2006, 07:17 PM   #5
RyanPerrella
Super User
 
RyanPerrella's Avatar
 
Join Date: Apr 2006
Location: Beverly Hills, CA
Posts: 8,927
Default

If you have a twin screw I would find a way to pump the gearbox fluid through that cooler, similiar to the GTS cars. You already have hardlines running on the underside of the car, you would need to find a location to pull from the G28 box amd likewise to return to, (although You could probably use the front drain plug and the top, breather area as your return) and get a small electric oil pump. You wont have the efficency of the GTS unit as i believe there are squirters directly onto the gears but it would increase your transaxle capacity by nearly 2L and would be great if you drive the **** out of it.
RyanPerrella is offline   Reply With Quote
Old 12-17-2006, 07:19 PM   #6
marton
Super User
 
marton's Avatar
 
Join Date: Nov 2001
Location: zürich, switzerland
Posts: 2,233
Default

HTML Code:
Oil cooler hoses to rad are larger than trans. 
It is possible to slow down oil flow.
Never saw an auto oil cooler; I have a manual.

I copied this picture from the Behr site, I hoped it would give dimensions for the engine & transmission oil coolers but there is nothing written. The connections for the 2 coolers look very similar but I do not know how accurate is the drawing...

Marton
marton is offline   Reply With Quote
Old 12-17-2006, 07:23 PM   #7
marton
Super User
 
marton's Avatar
 
Join Date: Nov 2001
Location: zürich, switzerland
Posts: 2,233
Default

If you follow Ryans suggestion about cooling the gear box and you are still worried about engine oil temp you could always add an extra external engine oil cooler?

Marton
marton is offline   Reply With Quote
Old 12-17-2006, 07:24 PM   #8
ZEUS+
Addict
Rennlist Member
 
ZEUS+'s Avatar
 
Join Date: Aug 2006
Location: Manchester,NH
Posts: 1,202
Default

The fittings do appear the same on my S4. Maybe it will flow normally.
ZEUS+ is offline   Reply With Quote
Old 12-17-2006, 07:51 PM   #9
Steven Ko
User
 
Join Date: Jun 2003
Location: Calgary, AB
Posts: 102
Default

I tried to do this after converting to a Devek Radiator with no cooler. I bought an external automatic transmission oil cooler off of a 928 and planned to use that as an external oil cooler. The fittings are significantly smaller than that of the oil cooler. Offhand I would say about 1/2 the size. I was worried that this would restrict flow significantly so I went with an external oil cooler with proper sized fittings.
Steven Ko is offline   Reply With Quote
Old 12-17-2006, 07:55 PM   #10
ZEUS+
Addict
Rennlist Member
 
ZEUS+'s Avatar
 
Join Date: Aug 2006
Location: Manchester,NH
Posts: 1,202
Default

The restriction is what concerned me also. The fittings on my S4 do look the same, just smaller hoses.
ZEUS+ is offline   Reply With Quote
Old 12-17-2006, 08:13 PM   #11
Vlocity
Addict
Rennlist Member
Thread Starter
 
Vlocity's Avatar
 
Join Date: Dec 2003
Location: Northwest, Ohio
Posts: 1,321
Default

Good feed back guys.....

I may just go with a MoCal and mount it up front with the heat exchangers for the intercooler.

As for the tranny, if I go with a cooler back there I would probably just mount a cooler in a horizontal position with a small designated fan.

Thanks for all of the replies.

Ken
Vlocity is offline   Reply With Quote
Old 12-17-2006, 08:26 PM   #12
danglerb
Super User
 
danglerb's Avatar
 
Join Date: Oct 2006
Location: Orange, Cal
Posts: 8,423
Default

The radiator is already cooling the oil since the oil is running through the same aluminum block as the coolant. It has at least some risk of harm, and little to gain.

Before doing any plumbing I would measure the temperature to see if its warranted. Air ducting might be better than a external cooler too.
danglerb is offline   Reply With Quote
Old 12-17-2006, 08:31 PM   #13
RyanPerrella
Super User
 
RyanPerrella's Avatar
 
Join Date: Apr 2006
Location: Beverly Hills, CA
Posts: 8,927
Default

if you want an external oil cooler buy the 90+ porsche item. I paid I think $305 for it new, it mounts just below the radiator. Use that for oil. Use the trans cooler above the rad to cool the transaxle oil, or just remove it.
RyanPerrella is offline   Reply With Quote
Old 12-17-2006, 09:04 PM   #14
Vlocity
Addict
Rennlist Member
Thread Starter
 
Vlocity's Avatar
 
Join Date: Dec 2003
Location: Northwest, Ohio
Posts: 1,321
Default

"The radiator is already cooling the oil since the oil is running through the same aluminum block as the coolant. It has at least some risk of harm, and little to gain."

Danglerb
I don't understand what difference this would make as one "end" of the radiator is already circulating engine oil. I would be employing both "ends".


"Use the trans cooler above the rad to cool the transaxle oil, or just remove it.

Ryan
The cooler is integral to the radiator and not an external cooler.
Vlocity is offline   Reply With Quote
Old 12-17-2006, 09:56 PM   #15
RyanPerrella
Super User
 
RyanPerrella's Avatar
 
Join Date: Apr 2006
Location: Beverly Hills, CA
Posts: 8,927
Default

Oh,

Is the cooler above the radiator and below the intake ducts one piece with the radiator assembly? I didnt know, manual cars before 92 dont have that. I figured it would be a different part.

Regardless, I wouldnt run oil through it, your radiator is your oil cooler it runs through a tank inside the end cap of the rad. If anything you would reduce circulation of the already effective engine oil cooler and also have the potential for more oil leaks with the additional lines you want to run.
RyanPerrella is offline   Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
GEARBOX COOLER SYSTEM Installation and Review powdrhound 996 Turbo Forum 27 06-12-2015 01:25 PM
Oil Cooler Leak - What Will Leak - Oil or Coolant? Will Feather 924/931/944/951/968 Forum 21 09-15-2012 07:04 PM
Difference between tranny oil and engine oil coolers? TAREK 928 Forum 6 03-23-2006 07:11 PM
Installing additional oil cooler, which oil line is..? Flying Finn 993 Forum 22 11-29-2004 09:41 PM
External Oil Cooler Normy 928 Forum 3 05-23-2003 11:02 AM


Tags
2006, cooler, cooling, engin, engine, expedition, oil, pic, radiator, rdiator, run, stock, trans, transmission, trasmission

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump


All times are GMT -3. The time now is 05:19 AM.


Copyright © 1998 - 2015 Rennlist.com