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Overheating

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Offline TysonS

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Overheating
« on: May 19, 2006, 10:29:23 PM »
Hey,
I have a 91 1.6 sidekick and it overheats when in tight trails in for low,... and gets to about 3/4 on the gauge on the hwy when it is about 35C out side?

Termostate checked
Clutch fan is good


what else?
thanks
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2 Dr. 91'  8v Sidekick| 3" Body Lift | 4" Gas Tank Lift | 3.5" Suspension Lift | Snorkel | Custom Bumpers | Sliders | 31" LTB's | Detroit | 4.24 Tcase | TT front locker soon
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Shilly

Re: Overheating
« Reply #1 on: May 20, 2006, 03:50:20 AM »
The first thing I would do is backflush the cooling system and change the coolant. If it has never been backflushed there could be quite a bit of junk floating around in there. In addition, it could be a worn water pump that isn't working as efficiently as it should. Try the backflush first (much easier and cheaper than a water pump) and see if that helps.
                                                                                                                  Dave
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Offline Jimiweld

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Re: Overheating
« Reply #2 on: May 20, 2006, 05:57:05 AM »
You can also take the thermostat out completely for warm weather so the water just circulates all the time. We used to notch the rad cap seal as well so it was no longer under pressure.
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Offline biker

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Re: Overheating
« Reply #3 on: May 20, 2006, 08:47:11 AM »
I had a similar problem on my 91 and found that the clutch fan wasn't locking up properly. I removed the stock fan and put on an electric fan from an A/C equiped Kick and it seems good unless I'm working it's guts out for extended periods of time.
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Offline TysonS

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Re: Overheating
« Reply #4 on: June 11, 2006, 10:08:25 PM »
just thought i would give a update.

I got a electric fan from a 3.0L Ford Taurus and it cools nice and quick.

I now have the mechanical fan for on the street and when off road I turn on the electric and it cools nicly
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2 Dr. 91'  8v Sidekick| 3" Body Lift | 4" Gas Tank Lift | 3.5" Suspension Lift | Snorkel | Custom Bumpers | Sliders | 31" LTB's | Detroit | 4.24 Tcase | TT front locker soon
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Offline derekj

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Re: Overheating
« Reply #5 on: June 11, 2006, 11:24:38 PM »
thats what i have on my truck also. works great around town and stuff and soon as we hit the trails the electric comes on - no more overheating :D

derek
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Offline fullsink18

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Re: Overheating
« Reply #6 on: June 12, 2006, 12:40:54 PM »
I have just replaced my thermostat with 160 degree setup.  Helps keep the kick cooler overall.  I plan on installing an electic fan from an old civic. 
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Offline msabmf

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Re: Overheating
« Reply #7 on: June 12, 2006, 07:00:36 PM »
FIRST check your radiator cap if its not holding proper pressure it will run hot and can cause over heating   if all is good you can buy water weter its used in street rods it will lower your tep 10 to 20 degrees
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Offline reb

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Re: Overheating
« Reply #8 on: June 12, 2006, 08:15:51 PM »
Some good suggestions here.  If everything is in good condition, I wouldn't take the thermostat out or notch the cap gasket, tho.  Also make sure the radiator is clean outside--too many bugs and dirt or whatever or bent fins will reduce the efficiency of the radiator.
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Offline beerman

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Re: Overheating
« Reply #9 on: June 12, 2006, 08:46:00 PM »
my mother had a Mazda B-2600, that engine disliked thermostat's not made by mazda.

when driwing in the 4LOW gears the engine started overheating :'( causing the engine to crack.

expensive replacement parts +all the work >:(

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Offline Quaddawg

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Re: Overheating
« Reply #10 on: June 12, 2006, 09:04:08 PM »
Mine has never broken a sweat. Never. But a fellows with us trail riding a couple of weekends back was overheating. I thought it was his fan clutch.. but I haven't heard back yet.

Clogged radiator from mud/sand/silt outside

Clogged with gunk inside

weak water pump

Fan clutch

Thermostat flow is low, even though it "checks out"

incorrect antifreeze-water mixture (believe it or not, I have seen engines that wanted it right, rare)

Slipping belt not driving fan/waterpump (general, not sure if it pertains to these little engines..lol)

I am betting your radiator is a bit clogged, as although the electric fan helped out, these little engines, when the cooling system is functioning correctly, do not over heat.

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Offline wildgoody

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Re: Overheating
« Reply #11 on: June 12, 2006, 10:40:25 PM »
If the electric fan helped, then the radiator and
thermostat are OK, Fan Clutch is my bet, who
want's odds ???
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Offline TysonS

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Re: Overheating
« Reply #12 on: June 13, 2006, 12:41:15 PM »
No, my clutch fan is fine.  I think it is the water pump because it is the stock water pump from just over 250 thousand km's ago?

How much is a water pump?
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2 Dr. 91'  8v Sidekick| 3" Body Lift | 4" Gas Tank Lift | 3.5" Suspension Lift | Snorkel | Custom Bumpers | Sliders | 31" LTB's | Detroit | 4.24 Tcase | TT front locker soon
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Offline Quaddawg

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Re: Overheating
« Reply #13 on: June 13, 2006, 01:48:14 PM »
Just curious to know how you know your fan clutch is fine??  How did you check it?
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Offline beerman

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Re: Overheating
« Reply #14 on: June 13, 2006, 02:00:27 PM »
it's easy, before you start engine -turn the fan, it should give little resistance.

start engine, drive the engine until it is hot.

on some cars you can hear it start. if not, stop the engine and trye to turn the fan.

if your fan is stuck -your fan is in good shape. if it feels like before you started -get an electric fan OR...

-do like my father, he filled the chlutch assembly with fine, dry sawdust ;D
inexpensive upgrade.
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