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Losing coolant!

 
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  #1 (permalink)  
Old 14 Oct 2014, 08:50 pm
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Default Losing coolant!

Today I suddenly found there is no coolant in the reservoir.
I flushed the radiator about 6 months ago, I used the lower radiator hose to drain the radiator.

It is not likely that the coolant leaks from the hose because it is very tight.

Any other possible leaking spots?
And how to check where it leaks?
Thanks a lot!
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Old 14 Oct 2014, 10:58 pm
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Default Re: Losing coolant!

Cooling system pressure test
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Old 15 Oct 2014, 09:45 am
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Default Re: Losing coolant!

In addition to the pressure test you can get a UV dye kit and make it easier to see the leak.

OTHERWISE bring to a mechanic to do all the above.

Mike
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Old 15 Oct 2014, 10:42 am
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Default Re: Losing coolant!

With car cold, fill your radiator and then the coolant bottle.
Start the car, turn on A/C, and let it run.
If it gets to normal temperature and engine fan doesn't come on, there's your problem.
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Old 15 Oct 2014, 12:52 pm
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Default Re: Losing coolant!

Quote:
Originally Posted by quicksilverdon View Post
With car cold, fill your radiator and then the coolant bottle.
Start the car, turn on A/C, and let it run.
If it gets to normal temperature and engine fan doesn't come on, there's your problem.
Good diagnosis the AC or fans must be drinking the fluid?!

He said losing fluid NOT running hot.
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Old 15 Oct 2014, 01:35 pm
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Default Re: Losing coolant!

Quote:
Originally Posted by postbeauty View Post
Any other possible leaking spots?
i've had mine leak from the waterpump. no dripping, it would evaporate before hitting the ground

i've had it leak from the radiator where the plastic top is crimped to the aluminum core. again, no dripping, it would evaporate before hitting the ground

i've had it leak from the heatercore, vents would stink when the heat was on.

i've had it leak from the lower hose. it chafed through from rubbing against the cooling fan. since you removed your lower hose to drain it, this might be your problem.

Quote:
Originally Posted by postbeauty View Post
And how to check where it leaks?
after driving, get a flashlight and look around for steam. check the radiator where the plastic top is crimped on, make sure it looks dry at the seam. look at the pulleys. steam down there could be a leaky waterpump. also inspect the lower hose and make sure it's not chafing on the fan shroud. dont overlook it because of how tight the ends fit. the hole on mine was rubbed through in the middle.

worst comes to worst, it'll be easier to find the leak as time passes and it leaks more. for now, keep it full. that's the important part.

not a mechanic, just my 2

Last edited by rob342; 15 Oct 2014 at 01:41 pm.
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Old 15 Oct 2014, 02:01 pm
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Default Re: Losing coolant!

antifreeze/coolant will leave a dusty like residue when it dries out

If the reservoir is empty there is leak in the container itself or you may have a heating problem.

As I said the prescribed procedure to start finding the problem is to first perform a pressure check/test of the cooling system.

I am a "mechanic" and that is my 25cents of free help.
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Old 15 Oct 2014, 06:35 pm
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Default Re: Losing coolant!

Is it possible that the radiator cap is leaking.

The car had a slightly over-heating problem about 2 month ago, when I waited for the traffic light, the temperature gauge passed the mid-line. But it became normal when the car is running.

My guess is that:
If the leaking is from the radiator cap, and when the coolant in the radiator is lower than some level, the coolant will never pass the radiator cap into the reservoir, so no more coolant will leak. This explain why the car can run normally in the past 2 months.

I will replace the radiator cap and refill the radiator and reservoir, and check if any more leaking happen.

Is stant 10234 (18PSI) a good one to be used on 2006 PT CRUISER NA model?
I read someone suggests to use 16PSI cap.

Any suggestion? Thanks a lot.
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Old 15 Oct 2014, 07:29 pm
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Default Re: Losing coolant!

As I pointed out coolant when it dries will leave a powder like residue.
STANT
2006; OE Type Radiator Cap .................................................. ..... 10234

I do not recommend the lower 16psi radiator cap for your application.

You theory about how a cooling system works is not exactly........ "real"!
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Old 15 Oct 2014, 07:33 pm
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Default Re: Losing coolant!

my guess is aliens come down and harvest the HOAT to use in there space ship , and leave you with nothing in the tank,

omg, do a press test,
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