Announcement

Collapse
No announcement yet.

150 auto transmission oil cooler install - Davies Craig 678 with fan and thermo switch

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • 150 auto transmission oil cooler install - Davies Craig 678 with fan and thermo switch

    Background - It all started with the Scanguage. I can blame Pradopoint for putting me onto the Scanguage. I mainly use it for the X-guages and the ATF temps. Codes can be found here.

    I use the Hilux code which apparently measures the ATF body temp not the Torque Converter. It is the more stable temp but I regularly get over 100 deg C and upto 110 going up long hills. Just driving around the suburbs can easily get the temps upto 90. Putting it in S mode helps a little but gearbox still runs hot. Planning to do more beach driving which gets the temp up over 100 deg immediately.

    From reading numerous threads it is not recommended to have more than 85 to 90 degree oil temps. The ATF high temp light is set at 150 degrees which seems very high. Most people who have flushed their ATF fluid report brown or burnt fluid. I reasoned that I would also have burnt fluid and I did notice that the shifts felt "softer" when the temps were 90 degrees or more.

    So an ATF oil cooler was added to the long list of upgrades and had been pushed up the list of priorities. Deciding which way to go took a bit of reading. I could have got one professionally installed for around $600 or buy one from $150 and install myself. Looking at the various installs on Pradopoint it seemed a pretty straight forward install other than fiddling around with mounting brackets.

    The highest temps that I saw were at low speed, hill climbs, sand, and low range work where there would not be alot of airflow over the cooler. I decided I needed a thermo fan with an automatic switch.

    The Craig Davies 678 cooler seemed to be a popular choice. It can be had for around $150 which is good value considering it comes with hose and fittings. I bought the DC0698 for $230 which is a 678 with a 8" fan. It came with hose, relays and fittings but no thermo switch. I bought an inline thermo switch for $40. I also needed another metre of 3/8" oil cooler hose and a 3/8" hosetail joiner.


  • #2
    Cooler position and brackets

    After playing with some mounting options I decided to mount the cooler below the horns with the outlets pointing up. I designed and cut up some stainless steel brackets to attach to existing mounting points on the car.







    Tin175
    Senior Member
    Last edited by Tin175; 22-12-2014, 08:21 AM. Reason: spelling

    Comment


    • #3
      Thermo Fan install

      Next was to install the Thermo fan, switch and relays. I had to drill some extra holes though my brackets to mount the fan. I prefer this to poking the clips through the fins in the cooler. I also installed the 85 deg thermo switch on the return line to the transmission. I figured this would be the best place. If the oil coming out of the cooler was over 85 deg the fan would kick in to help out.

      Update - For the oil to be coming out of the cooler at 85deg the fluid going into the cooler would need to be about 110 degrees which is too hot. I will be moving the switch before the cooler so the fan kicks in earlier.



      The thermo switch is above the cooler between the horns.



      After installing I checked the direction of the fan. I wanted a pusher configuration. I had to swap the polarity of the fan wires. I should have checked this first before wiring to the car.
      Tin175
      Senior Member
      Last edited by Tin175; 30-12-2014, 09:56 AM.

      Comment


      • #4
        Plumbing and filling

        Cooler was in place, fan wired up and working. I checked the switch in the programmable kettle and checked again when installed with a hair dryer.

        All that was left was to plumb it in. The top hose of the side of the radiator near the second battery was the return line that I need to connect to. One hose goes from the outlet to the cooler and the return from the cooler connects to the transmission return with a 3/8" brass hosetail connector. I could have ran the line a little further and connected directly to the metal return line down lower but was happy enough with what I ended up with.

        Hoses going up and in front of the radiator. The small split tube is the power for the fan going to the 2nd battery (not yet connected).







        Inline Thermo switch

        Comment


        • #5
          Filling and initial performance

          I will be doing a transmission flush when my mechanic comes back from holidays. I just filled the cooler with ATF fluid and then connected it up the the car.

          I first removed the top hose. It leaked a little fluid, maybe a couple of teaspoons. With the ends of both hoses to the cooler un-connected I shoved the nozzle of the 1 litre ATF fluid bottle into the end of one of the hose and squeezed the fluid into cooler until the fluid ran out the other hose. I used about 250mL. The nozzle of the Penrite full synthetic Toyota IV compatible fluid was just the right size to fit inside the hose.

          I then quickly connected everything up with a few rags in place to catch the minor leakage as I was pushing the pipes onto the connectors.

          I started up the car and checked for leaks. All good so I put everything back together.

          Went for a drive that night to see the Christmas lights. Not really the most exciting thing to do, but was keen to see how well the cooler worked.

          Mostly driving around residential areas for about 30 mins. I didn't see the temp rise above 65 degrees. My expectation without a cooler would be around 80-90 degrees. So a drop of around 20 degrees. It didn't get anywhere near hot enough for the fan to kick in. I think the fan will only ever kick in when I'm on the beach or doing alot of low range hill climbs. Even then, without the fan, the cooler should keep the temps below 100 degrees.

          Looking back, I would have probably been OK without the thermo fan. Would have saved some time and money. Overall it was a pretty easy job other than the brackets. You could do it yourself in and afternoon for less than $200 if you don't go the fan.

          I have 100k on the clock and my fluid was brown and smelt a bit burnt. With this cooler and a fluid flush I'm feeling much better about doing some bigger trips in the coming years. If you don't have one already it is a highly recommended upgrade.

          Comment


          • #6
            Oil Cooler

            Originally posted by Tin175 View Post
            I will be doing a transmission flush when my mechanic comes back from holidays. I just filled the cooler with ATF fluid and then connected it up the the car.

            I first removed the top hose. It leaked a little fluid, maybe a couple of teaspoons. With the ends of both hoses to the cooler un-connected I shoved the nozzle of the 1 litre ATF fluid bottle into the end of one of the hose and squeezed the fluid into cooler until the fluid ran out the other hose. I used about 250mL. The nozzle of the Penrite full synthetic Toyota IV compatible fluid was just the right size to fit inside the hose.

            I then quickly connected everything up with a few rags in place to catch the minor leakage as I was pushing the pipes onto the connectors.

            I started up the car and checked for leaks. All good so I put everything back together.

            Went for a drive that night to see the Christmas lights. Not really the most exciting thing to do, but was keen to see how well the cooler worked.

            Mostly driving around residential areas for about 30 mins. I didn't see the temp rise above 65 degrees. My expectation without a cooler would be around 80-90 degrees. So a drop of around 20 degrees. It didn't get anywhere near hot enough for the fan to kick in. I think the fan will only ever kick in when I'm on the beach or doing alot of low range hill climbs. Even then, without the fan, the cooler should keep the temps below 100 degrees.

            Looking back, I would have probably been OK without the thermo fan. Would have saved some time and money. Overall it was a pretty easy job other than the brackets. You could do it yourself in and afternoon for less than $200 if you don't go the fan.

            I have 100k on the clock and my fluid was brown and smelt a bit burnt. With this cooler and a fluid flush I'm feeling much better about doing some bigger trips in the coming years. If you don't have one already it is a highly recommended upgrade.
            Looks great Good install and pics . The brackets are very professional you should start selling them.
            Sealed for life ! Mr Toyota don't expect the tranny to live long.
            Anyone with a auto should check the colour of there oil. While fitting a oil cooler to mine at 100k oil was also black. Two cans of genuine Toyo later and a bit better colour.
            Just got back from 5 weeks holiday to the Snowys and Vic high country towing a 2.5 Tonne van . No problems money well spent. ( Pajeros have a cooler standard Come on Toyota )
            2016 ISUZU DMAX TWIN CAB.

            Comment


            • #7
              Very nice install, and great write up. They make a huge difference.

              Comment


              • #8
                PM sent . Thanks

                Comment


                • #9
                  Have also posted this on http://www.pradopoint.com/showthread...l-cooler/page3.

                  This is my install of the PWR V8 cooler, looks about the same size as the 678. Bought from Repco on the 25% off day. With the same extras of 1m tube and the joiner total cost was $120 approx. mounted pipes to the side and hot oil into the top. Bracket is made from 20x3 flat steel and bent the horn brackets to clear. Also turned them 90 deg so the wires fitted better.
                  The bolt holes are existing in the bottom chassis and the top mount is the horn bolt. Did the same as others and profiled the cooler with oil on install.

                  The 150 and 120 are very similar mounting pattern.

                  Made a new bracket for the aircon pipe as well.

                  Did the test drive and couldn't get the main box to 80 but the torque rose to 85 under heavy load, one foot on the brake, second gear going uphill.
                  Without cooler this would have been 15 deg hotter.

                  Would now like to build a auto oil changer. Two vessels of 15 liters each, one for the old oil to be pumped from the transmission. The two vessels are connected by a line on the top and sealed.The second vessel has a line from the base back to the transmission.
                  Fill the second vessel with new oil.
                  As the transmission pumps oil into the first vessel the displaced air will force the oil in the second vessel back into the transmission. This would then change the oil rather than mixing 3 liters at a time doing it the old fashion way.

                  Anyone seen this? Or am I just mad.


















                  picture hosting
                  08 VX D4D, Lift, Safari Snorkle, Trailblazer Fridge, Custom Storeage System, BFG, ARB Safari Bar, Wife, Kids, Codan NGT HF Radio, Debt.
                  06 100 Series Sahara, Bilteins, Kings, Beaudesert 3", Diff drop, Unichip Q4, Safari Intercooler, EGR delete, 20ft Bushtracker, Codan Envoy more coming.
                  Sometimes i wake up Grumpy, most times i leave her sleep.

                  Comment


                  • #10
                    There has to be a better way as you described. I was not too happy with the way I did it but better than the black sludge that was in it .
                    A mechanic told me the way they do it on Holdens is to disconnect the return pipe to the tranny from the cooler plug in the hand oil pump. Put a length of hose on the return to the cooler in to a container and pump away until the fluid is clean . Job done. The cost of the oil it better work. Has anyone tried this way.
                    2016 ISUZU DMAX TWIN CAB.

                    Comment


                    • #11
                      I believe Toyota use a machine to do this, basically does the same as described, pumps oil in while pumping old oil out until outflow runs clear, this makes sure all the oil which is normally trapped in the converter is replaced as well. Haven't seen it done but makes sense to me. I believe they run the vehicle to pump it through, could be wrong though.
                      Loving the mountings for the coolers, far more professional than the ones the local auto trans place used when installing mine.
                      Kev,

                      2010 Silver 5dr GXL, Auto, diesel, ARB Deluxe bar, ARB bash plates, lightforce 170's, safari snorkel, towbar, dual batteries, air bags, trans cooler, Kings/Koni's, ARB rack, Cooper S/T Maxx's, Rock Tamers, Beaudesert 2.75" exhaust and more to come.

                      Comment


                      • #12
                        Thermo switch in the wrong line

                        Its been about 2 weeks with the cooler installed. It has been an excellent upgrade. Overall the gearbox feels a little crisper. Around town the gearbox has never got over 90 degrees and sits around 75 to 80 degrees most of the time. Highway work at night would see temps under 70 degrees.

                        Just got back from a 600km trip through some hilly roads on the QLD NSW border. We did the Boonah to Kilarney drive up to Queen Mary Falls and did the 14 crossings of the Condamine river and then drove down to Boonoo Boonoo falls which were spectacular.

                        On the long winding climbs the gearbox got to 102 degrees and the torque convertor showed 130 degrees. Mostly doing under 60km/h so not much cooling airflow. When I did not have a cooler I have previously seen temps of 110 to 115 on similar climbs.

                        Temps would get back under 90 degrees within a few minutes after the climb. At the top of one of the climbs I got out and checked to see if the thermo fan was running. It was not running. I installed the thermo switch after the cooler so the even though the fluid going into the cooler was over 100 degrees the fluid was under the trip temperature (85 deg) after going through the cooler. I would need to be seeing temperatures of over 110 degrees before the thermo fan would trip.

                        I will be moving the thermo switch so that it sees the fluid before entering the cooler.

                        Comment


                        • #13
                          When you mention torque converter temps is that the value you are reading from a scangauge or something else?

                          I'm interested to see the temps you read after you have swapped the thermo switch before the cooler.

                          Comment


                          • #14
                            I am using a Scanguage. There are two ATF temperatures you can have as an X guage. One is at the torque converter and one is on the body of the transmission. You can find more information HERE

                            Torque converter temp rises very quickly and is regularly over 100 degrees even with the cooler. However it does come down very quickly too. When the converter is locked the two temps are exactly the same.

                            Comment


                            • #15
                              Hmm I might have to double check which one I have entered into the X-gauge. Mine is the 120 series though, would think they both had the two sensors. Pretty certain I just have the latter of the two you described.

                              Comment

                              canli bahis siteleri bahis siteleri ecebet.net
                              mencisport.com
                              antalya escort
                              tsyd.org deneme bonusu veren siteler
                              deneme bonusu veren siteler
                              gaziantep escort
                              gaziantep escort
                              asyabahis maltcasino olabahis olabahis
                              erotik film izle Rus escort gaziantep rus escort
                              atasehir escort tuzla escort
                              sikis sex hatti
                              en iyi casino siteleri
                              deneme bonusu veren siteler
                              casibom
                              deneme bonusu veren siteler
                              deneme bonusu veren siteler
                              betticket istanbulbahis
                              Working...
                              X