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post #1 of (permalink) Old 08-20-2001, 03:32 PM Thread Starter
 
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Overheating

Hi

My Zuk is now overheating and I am running out of options.
I have replaced: waterpump (nasty job), thermostat, radiator cap (Alternator while I was having fun).
None of these items made a difference, although the waterpump would have needed replacement anyway.
I have also flushed the radiator with a prestone product.

End result, I can drive 6 miles in 95 degree weather before it starts to overheat.

When it overheats the coolant is discharded into the resevour (spelling) and then ....

I do not have water in the oil pan ( changed the oil ) or oil in the radiator.

The exhaust pipe is rather black and it is not smoking ( black or gray ).

Suggestions. I have not purchased a radiator yet, zuk is an 87 with 73 K miles,

LoneZuk


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post #2 of (permalink) Old 08-20-2001, 03:50 PM
zukikid
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Re: Overheating

checked the fan clutch?...try this...reach down and check to see if the flan clutch moves freely ,if it does good ,now drive around till the zuk heats up .park it ,now check and see if the fan is hard or impossible to move, if so its not the fan clutch .if it moves freely like before driving it ...thats your problem.
hope this helps.
zukikid
p.s. disclaimer,any or all infomation could be wrong so ...

proud owner of the SUPER stock zuk. :-)
post #3 of (permalink) Old 08-20-2001, 03:51 PM
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Re: Overheating

I would pull the rad and have a shop boil/rod it out. They'll tell you if you have a blockage in the rad.
Same thing happened to a buddy of mine. It was only after he gave up on it an thought he blew the motor, that I pulled the rad and had it checked. It was shot and the cause of the overheating.... Hope this helps....

All Good Medicine,
Crow

Creator, everything we do leaves a track. May our tracks be ones we would want you to see and others to follow......

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post #4 of (permalink) Old 08-20-2001, 03:52 PM
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Re: Overheating

Lonezook:

Looks like you are down to a collapsed hose or a plugged radiator. Try this:

Take the radiator cap off and drain down the radiator from the bottom until you can see the top of the insides of the radiator. Is there a LOT of calcium buildup around the tube holes? If so, then you need to get your radiator rodded. ($65-80 at a radiator shop).

Another clogged radiator clue might be the amount of calcium that you found in the water pump when you replaced it.

Open the hood and run the engine from cold. Watch all the major water hoses including the ones to the firewall but ESPECIALLY the big ones that run to and from the radiator. Do they hold their shape or do they flatten out? If they flatten out (and restrict the water flow) then you need to replace them. They also might show that your radiator is plugged -- especially if the collapsed one is on the bottom.

Hope these ideas help!


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post #5 of (permalink) Old 08-20-2001, 04:09 PM
 
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Re: Overheating

The odds are Against your having a bad fan clutch.

The odds are WAY in your favor of having a stopped-up radiator.



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post #6 of (permalink) Old 08-20-2001, 04:12 PM Thread Starter
 
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Re: Overheating

Hi

I have checked the hoses and they keep their shape.

The bottom hose and top hose are both hot.

The old water pump did not have any calc. deposits, the vanes were in bad shape.

I just tested it with the heater on ( its almost 100 outside ), it does not overheat as quickly (takes longer).

I have not tested the fan. If I understand correctly, it should be hard to turn when warm. I will test
this in about 2 hrs.

Thank You All
LoneZuk

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post #7 of (permalink) Old 08-20-2001, 04:56 PM
 
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Re: Overheating

You need to test the rad. with an infrared temp. gun. Test it in at least a dozen places - I went round & round for Weeks with this same situation back when I had my Sidekick. New radiator solved the problem.


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post #8 of (permalink) Old 08-20-2001, 05:37 PM
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Re: Overheating

oh yeah...i forgot ...you might need to adjust your timing ,if your distributer is to far advanced you will run hot as well... just trying to narrow down the field by checking the e.z. stuff first before the hard.

zukikid

proud owner of the SUPER stock zuk. :-)
post #9 of (permalink) Old 08-20-2001, 06:27 PM
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Re: Overheating

I just went through all of this myself.

It was my radiator.

New radiator and all is well with the world!

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post #10 of (permalink) Old 08-20-2001, 06:59 PM
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Re: Overheating

I just went through an overheating situation with my Neon. During the recent heat wave in the northeast, if I tried to drive with the a/c on it would practically peg the temp gauge. I thought thermostat, water pump, etc..all the usual suspects.

Yes, I know its not a Zuk, but here was the big solution for me:

I took a garden hose with a squirty nozzle and sprayed the front of the radiator and a/c condenser real thorougly. It didn't even look like much of anything came out (and eventually through) other than water, but I guess all the bugs and dirt and salt and junk that had accumulated over the past couple year just got it to a critical point where it couldn't handle the job of cooling during the heat wave we were having, especially with the a/c on.

It returned to operating at a completely normal temperature range. That was the whole problem.

~daxe

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