From wagoneers.com Thu Jul  8 11:37:23 2004


You've got several options to keep the temperatures down...

FYI:  50C=122F.  ouch.

I've had my '85 XJ with the 2.1L TD in Las Vegas, NV when it was 115F,
it did fine...

So, the options you have are:

1) use synthetic oil (whatever brand, it'll help... of course I recommend Amsoil)
2) add an external engine oil cooler, one could be added with an externally
	mounted oil filter.   TransAdapt sells them, I think, as well as amsoil
	and a few other companies.
3) if you have an AT - use synthetic ATF and add an external cooler and filter
4) vent the back of the hood - put washers between the hood and the hinge, remove
	the rubber seal.
5) add an extra heater core in line with your heater assy and mount it off to
	the side behind the grille, add shutoff valves in case something goes
	wrong like a rock to the grille, etc.
6) add an electric pusher fan to the front of your radiator assy, leave it
	on all the time or manually control it.
7) get the high flow water pump, search the xj digests for the posts on it,
	can't recall the name, try "kool" or something like that...
8) get a bigger radiator with MULTIPLE cores, the stock rad is like one or
	two cores, go with more, get copper if possible...  again, I've
	seen posts on this list and the FSJ list on this topic, or have
	a local rad shop customize one for you...
9) consider a larger oil pan (hey, might require adding a lift... ;) that
	has more capacity... or go with a dry sump setup and add oil capacity,
	more oil, better...
10) consider creating vents in the wheel wheels so air can pass through
	the front fenders as well as the hood
11) run a lower temperature thermostat
12) make sure you're running a 50/50 mix of antifreeze
13) add cooling fins to your oil filter(s)
14) consider fins on the oil pan
15) consider adding an auxillary water pump in the heater lines to help
	circulate coolant.
16) add coolant capacity with an additional reserve connected to that extra
	heater core


FWIW, I've done several of these tricks to my '68 Mustang when I lived in
Eastern Oregon and towed a large trailer...  I kind of went overboard and
had to remove the extra heater core... ;)  Things wouldn't warm up...

remember, to us 122degrees F seems pretty hot, but water boils at 212F
so the difference in temperature for the engine from 80F to 122F isn't
that big of a deal... ;)

The biggest benefit you'll see is running synthetic oil of any kind... it'll
prevent the breakdown at higher temps and help protect your engine...

keep us posted on the success of your temp reduction project. :)

john meister
sunny (partly) snohomish... where it's about 13C, 55F... :) yes,
	on July 7... but it's supposed to warm up to 75F next week... ;)



Boney Varghese wrote:
> Hey guy
> 
> One of the biggest problems with American jeeps here in the Middle East is
> the soaring temperatures sometimes touching 50deg. I guess there not made
> for these temp, the air-conditioning gives way just before everything starts
> leaking. 
> 
> So for the past couple of days I've been looking at Nissan Patrols and I was
> surprised about one thing; the needle on the temp gauge goes up by one a few
> points irrespective how long I've left it running with the air conditioner
> switched on. The Cherokee though within the first 15 minutes goes all the
> way to halfway point on the gauge.
> 
> How can we better control the temperature n the Cherokee?
> I remember reading somewhere that the engine should run between 90 to
> 100deg. Is this true?