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Originally Posted by rainman
....take cover hear come CARVS....
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Baaahaaahaaa .... Its all good rainman ....
All the adhoc methods work to varying degrees ... There is just so many that dont provide any data in regard to before and after results. If they all did ... they wouldnt be adhoc methods.
Im still only running two crappy XJ factory coolers with the heat exchanger bypassed ... blasted xmas and moving house
... Recorded temps are still averaging 70'C as long as I keep it out of overdrive .... Thats low range / highway / and towing results.
I dont doubt the actual oil temps are slightly higher as Im only measuring the sump housing temp ... not the oil.
As a comparison ... the sump housing is now up to 30 degrees cooler than what it used to be in the standard factory configuration.
So big bling, imported coolers arent an absolute nescessity .... just a better quality / properly made one - than the pathetic thing provided.
... With the exchange rate at the moment ... importing is perhaps a consideration.
I Will be fitting a std 6cyl auto falcon cooler for a comparison when the damn rain stops out here and will provide the temps that that cooler provides .... Then I will be fitting a 678 davies craig unit as I believe that will be more than satisfactory ... and locally available for easy replacement if damaged. The others I have here are big enough and work well under testing ... but I dont know what they came off so are of no value in regards to info for others.
The idea being that finally .... someone will have provided some before and after results with a variety of setups in different operating conditions ... so individuals will be able to make a decision using the results ... and their needs ... rather than relying on the guesses posted on a private web site as being the ultimate answer
In fact Im really really surprised that the difference between US and Oz heat exchanger placement in the XJ wasnt picked up on and posted on the net ... long before I started taking an interest in what I was driving
.... I'm pretty sure if it had ... it would have led to a completely different approach to the issue.
Quote:
Originally Posted by TERRA Operative
If you do that, you'll be heating your cooled oil back to the temp your engine cooling system is running at.....
You can buy inline thermostats, they bypass the oil cooler when cold, and allow full flow when hot. That way you get the best of both worlds, quick warm up, and no heat loading across cooling systems.
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Quote:
Originally Posted by tazwegion
Not entirely, returning via the radiator's heat exchanger will the increase transmission oil temperature but not to precisely the same as the engine coolant there will be a variance, adoption of configuration depends entirely on local environmental conditions
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Hence the reason that those who support the ...
aftermarket oil cooler first - then the XJ heat exchanger set up ... without fitting a temp gauge NEED the biggest cooler they can lay their hands on ...
in the hope it cools the oil enough so the engine coolant temp doesnt affect the benefits of the new oil cooler tooooo much
Not having a go at you Taz .... Doing it that way is a fairly safe way of getting some cooling without using a gauge to confirm results. I would rather have the gauge first ... see whats happening temp wise ... and then know how well I had fixed the issue going by the new operating temps.
Lots of aftermarket coolers have built in bypasses for initial startup / cold climate operation. The thermostat versions sound good ... but again ... a temp gauge would be needed to ensure the the thermostat was
always functioning correctly .... just like the engine coolant thermostat with its stuck open / stuck closed issues.
Its also worth considering repeated comments over the years about how hot the AW4 box gets compared to other autos .... Having read plenty of them over the last 18mnths on the web ..... I really dont think the AW4 is like an old GMH 3spd slushmatic that had to be left idling in the driveway for 10min during winter in Tumut or Omeo ... Personally I think the cold climate operation comments / concerns really ought to be left on the north american forums where they belong ....... Our cold weather is a joke by comparison to theirs.