over heating with griffin maxcool and electronic fans

[kfir]

HI,
My name is Kfir and i'm from Israel,
i have 2000 XJ and i had installed Griffin maxcool radiator and replaced the mechanical fan with two additional slim 10 inch fans (and left the AC fan as well) all three fans are working without AC on and i have another 11 inch fan in the grill for AC - i dont have any shroud installed becuase i couldnt find any scape for the shroud since i have a fifth fan for the outotranc cooler in the grill as well (i had to cut the grill to fit the fifth fan).
now my problem is that its getting overheated with AC on only in low speed (on and off road).

BTW
i'm on 33" + D44 F\R
Teralow transfer -
attached is a picture of the car:



can someone please advise how can i make sure it will not get heated with AC on?

PS - its quite frustrate that i got the best radiator availible and my JX gets over heating

[beakie]

few things;
1. if you have pusher fans working across from puller fans and they are not moving air at the same speed they will just fight each other and not move much air at all. almost sounds like you have so many fans they are fighting each other, or blocking air from moving. at the same time, if your fans are running while you are driving at speed, they will fight the natural air flow created by moving forward.

2. without a good shroud, the fan won't push/pull air through the rad, it will move it too/from the easiest path, which is probably just towards the outsides of the blades.

3. if you have the ac condenser in front of the rad, and you are already having problems moving air past the engine rad, you really need to address getting the air moving through the rads, not just around the fans.
- you could have the rad with a full shroud, bottle necked down to a tiny fan... providing it moves enough air it will cool the rad because the air has no choice but to pass through the rad... without a shroud air is simply moving around the fan, not necessarily through the rad.

[kfir]

Thank you,

I've removed the grill grill out, and now taking of the push fans from the front, this way I will earn additional 1.5" for the shroud, in the shroud I will install 3 X 10" fans in the shroud, do you think it will solve the problem?

[ajcal225]

I'd put the mechanical fan back in. I have yet to see one single Cherokee which cooled better with electric fans than it does with the factory mechanical fan and shroud.

[ashmanjeepXJ]

Originally Posted by kfir

I will install 3 X 10" fans in the shroud, do you think it will solve the problem?

Not all fans are created equal.
What is the CFM of your planned fans?
Does the CFM drop off quickly when under load?
1,200-1,500 CFM with no load

This is a good fan from Spall.
http://www.spalusa.com/pdf/30102157_SPEC.PDF#view=FitH

A better one $200 ea would be $600 in fans.... not cheap and will pull allot of current on start up. I would run Three 60-70 Amp relays, one for each fan due to the on surge current.
http://www.spalusa.com/pdf/30102800_SPEC.PDF#view=FitH

The Mechanical fan would give you alot of CFM for cheaper, could do that and a shroud for one electric fan as big as you can fit.

[Weasel]

here is mine: Shroud and 3 fans, seems to cool fine so far. AC isn't hooked up yet though. I did move the whole unit forward ~1".

[kfir]

Thanks for the comments but
I can't fit the mechanical fan it's touching the rad... It's not an option.
I'm building the shroud, hopefully it will solve the heating issue...

[Weasel]

need to check your fans for CFM flow as well. Stock has ~3200CFM, iirc..

[kfir]

each fan 1200 CFM x 3 = 3600... but its for cooling + AC, will it work?

[AZ METAL MAN]

If it's getting hot driving and sitting you have a flow problem. I'd change the T-stat out to a 165 degree and check your water pump as well. Fans should only come into play with cooling when not moving or moving slow/crawling.

[xjbrian219]

165 t-stat is way too low for an XJ. Keep the 195 t-stat, as the jeep should run around 210 in normal conditions. Sounds too hot, but not for an XJ.

[kfir]

Originally Posted by AZ METAL MAN

If it's getting hot driving and sitting you have a flow problem. I'd change the T-stat out to a 165 degree and check your water pump as well. Fans should only come into play with cooling when not moving or moving slow/crawling.

That's exactly the problem,

It's overheating only when I'm moving slow and not even when I'm off road - it's happening in traffic...

[kfir]

Originally Posted by xjbrian219

165 t-stat is way too low for an XJ. Keep the 195 t-stat, as the jeep should run around 210 in normal conditions. Sounds too hot, but not for an XJ.

My t-start opens in 195 and goes over 210 with AC on only when there is not enough air flow...

I took you guys advises and I'm building a shroud for the 3 10" fans and took off the extra pusher fan.

I hope it will solve it (if not I will be back complaining...;-)

Thanks

[barillms]

I have three 10" pushers shrouded with a 3 row heat buster upgrade radiator I got at Autozone and mine gets hot when I'm moving slow offroad, especially climbing long hills.

I just got a 180 Robert Shaw therm, a Flowkooler pump & I'm gonna hoan out & smooth the therm cover some. We'll see of this helps....

I have hood vents & I've routed the Trans thru a separate cooler also.

I'm doing everything I can think of to get this thing to stay at 210!

Next step is Evans Waterless Coolant :/

[kfir]

Originally Posted by barillms

I have three 10" pushers shrouded with a 3 row heat buster upgrade radiator I got at Autozone and mine gets hot when I'm moving slow offroad, especially climbing long hills.

I just got a 180 Robert Shaw therm, a Flowkooler pump & I'm gonna hoan out & smooth the therm cover some. We'll see of this helps....

I have hood vents & I've routed the Trans thru a separate cooler also.

I'm doing everything I can think of to get this thing to stay at 210!

Next step is Evans Waterless Coolant :/

Are you series?

So you are saying that it will not work
WTF should I do next???

[beakie]

Originally Posted by kfir

Are you series?

So you are saying that it will not work
WTF should I do next???

don't expect the same results. there are many different variables that change how things work, where they work and why they work.

get your shroud built, maybe try a NEW 195degree thermostat, and ensure the fans are wired properly (proper gauge wiring/relay/etc for each so it can move it's full potential of air)
if that doesn't work for you, check back in... also, if you can add some pics of what you end up with that may help people help you.

[Weasel]

Yeah you need to try each step, the system has to be setup correctly to work and that includes the above stuff.

Mine has been cooling fine as long as the fans come on. I had a issue with the second fan not kicking on and it would heat up until I kicked in the 3rd fan.

I am running a Hesco water pump but really only cause the Napa units were crapping out every 3-4 months and I got sick of it and wanted a quality pump.

How are you checking your fan CFM? I have heard that alot of fan company claims are inflated (imagine that). Spal is one that has accurate ratings.

[AZ METAL MAN]

Originally Posted by xjbrian219

165 t-stat is way too low for an XJ. Keep the 195 t-stat, as the jeep should run around 210 in normal conditions. Sounds too hot, but not for an XJ.

Hey know it all, you do realize the temp rating is only when the damn thing opens right

Rest assured you'll never cool a XJ below that "opening" temp unless you're driving in freezing conditions which hasn't been a problem for me in Phoenix.

[kfir]

Originally Posted by AZ METAL MAN

Hey know it all, you do realize the temp rating is only when the damn thing opens right

Rest assured you'll never cool a XJ below that "opening" temp unless you're driving in freezing conditions which hasn't been a problem for me in Phoenix.

I don't really know what is the real cfm,
I have the same fans as Weasel picture...

In the catalog it's says 1200...

[ingenio]

my humble comment:

return to a HD cluth fan paired to the stock shroud & install a 97+ stock efan.
the stock combo is capable to blow 4000+ cfms....just verify your water pump is in good condition and radiator cap is also OK.
I had installed also a triple efan set up ( shrouds, custom made controll, etc..) but when in summer days @ traffic or crawling, the system was not capable to keep the engine @210.