ATF Cooler

[Apache]

What is the pressure in the ATF system? I am putting my cooler where the drivers side indicator was, and opening up the bumper a bit to suit.

If I fit a bleed nipple on the outgoing pipe, can I bottom feed the rad, or is the pressure not high enough to fill the rad properly?

I imagine I'm better off top feeding it as then I know that the rad will be definitely be full.

Tony N, I believe you've dropped the rad cooler and just use an external cooler now. Has this worked out OK? I overheated the coolant this weekend and am concerned about driving a heavily loaded truck in the Pyrenees next year. I also have a Mitsy intercooler fan I was thinking of fitting so if I'm moving slowly on climbs I can switch it on for extra cooling.

Any thoughts?

[Apache]

Anyone??

Whats the matter with you all? Cat got your tongue?

[surfenstein]

you can buy a stand alone cooler with a fan already fitted.impo they are much better than a rad cooler.

[captain_chaos]

I've got a ATF cooler http://cgi.ebay.com/ebaymotors/Fluid...spagenameZWD1V going to copy lovely boyo's idea http://www.hiluxsurf.co.uk/forums/sh...ght=ATF+cooler

[europa88]

Hmm

I had one (atf cooler) about the same size and put in the same place as the lovely boyo and it didn't help.I moved it partially out of the way of the rad and cooling was marginally better. I moved it lower and between the chassis and crossmember (1.5 " lift) fitted a dedicated fan and yet still gets hot towing and at high speed. I fitted an atf oil gauge and a auxillary water temp gauge, so i could monitor all the different situations. iv'e also done all the mods ie fresh silicon in the hub ,4 row core rad etc etc. I think(dangerous) as the cooling system is marginal on these vehicles everthing has to be tried(funds permitting).

The next step is to do as tonyn has and bypass the inbuilt rad cooler and use a large ATF cooler with a thermostat to enable quick warmup!

i have sneaky feeling that there is 2 overheating issues with the kzn130's
one of pump cavitation at higher speeds(RPM) and another one of heat transfer via the inbuilt rad cooler.

Btw i'm sorry to hijack this thread but it may have some relevance

Ps i have kept my aircon condenser, i guess removing it may help with placement of the ATF cooler and airflow.

[Apache]

I'm probably gonna do as per Tony and abandon the in-rad cooler. Not sure about a stat yet. I might just monitor the temps first and see how long it takes the ATF to warm up. I suspect its gonna be no longer than it takes the coolant so there may be no point.

I already have a place sorted for the cooler where it will get unrestricted airflow.

[europa88]

I'm probably gonna do as per Tony and abandon the in-rad cooler. Not sure about a stat yet. I might just monitor the temps first and see how long it takes the ATF to warm up. I suspect its gonna be no longer than it takes the coolant so there may be no point.

I already have a place sorted for the cooler where it will get unrestricted airflow.

Yeah i think the ecu determines when to shift based on engine/coolant temp rather than autobox!

i have seriously tried everything apart from bypassing the cooler and fitting an intercooler! I'm attempting both in the coming month, wish me luck!

[Apache]

I doubt an intercooler will reduce engine temps directly to be honest, but it will probably mean you need less right foot to get to speed which should have the knock on effect of reducing engine temps.

Are you doing a top or front mount? I have an L200 cooler, but the fitting is fairly involved on the 3.0 compared to the 2.4. Would be interested in your ideas if you've done any planning.

[europa88]

I doubt an intercooler will reduce engine temps directly to be honest, but it will probably mean you need less right foot to get to speed which should have the knock on effect of reducing engine temps.

Are you doing a top or front mount? I have an L200 cooler, but the fitting is fairly involved on the 3.0 compared to the 2.4. Would be interested in your ideas if you've done any planning.

I'm gonna do a top mount with a rx7 front mount cooler, Iv'e got a second hand ali crossover pipe all we need to do is weld an ali flange and shut off the open end............simple......... ...not!

I just bought a cheepie peugeot 205 diesel to run around in while i do the mods as iv'e had this sitting on my workbench for nearly 2 years now. just need a scoop (l200 or nissan patrol) i'm thinkin as the finned part of the rx7 cooler is quite narrow, I already have some escort cosworth bonnet vents either side of the bonnet so if i can use something to channel the flow through the cooler and out these vents the better.

Demon tweeks do some embossed ali sheet which i have used befiore and It could do the job.

[MrE]

I experienced the over heating issue for the first time, when my mate took a turn at towing the Diahatsu F50 home from Andy's.
He was trying to maintain 60 going up a long hill(RRC V8 driver) and was worried as the power fell off and the temp crept up, we got to the top and pulled over and I had a quick check over, all was well with no leaks and the temp came down. I then gave him a lecture on surf driving Keep the rev's between 2000 & 2500 don't let the TPS cut in, and we sailed home at 60 without another problem.

I will be looking into fitting a cooler also as its a real worry that it should heat up like that in the first place.

Mark.........