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Overheating - ONCE???

 
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  #1 (permalink)  
Old 19 Dec 2018, 07:48 pm
soonercruiser's Avatar
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Red face Overheating - ONCE???

Had a strange occurrence of OVERHEATING yesterday, when I was just about all done "patrolling" the neighborhood and hiding packages.

Since I bought the 2003 Panel Cruiser, I have had just about every major mechanical system looked at or serviced.
Just like my other turbo Crusiers, the engine temp just sits there half way up the gauge.

But, last night, as I was about to head home, I pulled out info some traffic, hitting the turbo hard, just to turn into the next neighborhood street.
As I start down the street the engine warning chime goes off, and the temp gauge is SPIKED!

I looked under the hood, and underneath, and saw nothing.
There was a few drops of coolant coming off the passenger side of the radiator bottom; but, I figured that was probably the overflow.

So, after simply walking the last 2 streets, I come back to drive home quickly and everything is now "NORMAL"!
Radiator cap was holding pressure fine! (Was a few large clear bubbles that came up after I took the cap off. Color was clear and fine. No creamy stuff on the dipstick.)
No leaking!
I could not see any fluid level in the coolant reservoir; so I simply added some water.
Radiator replaced in 2013.

Today - EVERYTHING NORMAL, despite driving it a while this afternoon.
I bought more HOAT "ready to pour"...filled the reservoir most of the way up.
**And of course, just like my other Cruisers, she doesn't like being too full, and blows some off.

Funny thing is, I looked into the previous owner's records........nothing!
But, my Carfax report showed a lot of other "Dealer Service", including the thermostat was replaced in 2014 and 2016!
Hmmmm....

**So...correct me if you like....BUT I THINK THAT THE THERMOSTAT JUST GOT STUCK CLOSED in that on instance.
And, that is probably all I should address.
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Have now owned 6 PT Cruisers = Me PT Crazy!
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Old 19 Dec 2018, 08:16 pm
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Cool Re: Overheating - ONCE???

A thermostat is fairly cheap and not too hard to swap out... Also verify that the cooling fan is fully functional on both low and high speeds.
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  #3 (permalink)  
Old 19 Dec 2018, 08:25 pm
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Default Re: Overheating - ONCE???

Not so much related to your current issue, but just for more complete information, if I were you, visit your local dealership and they should be able to pull up any service history that was done at any dealership on your PT.

Might be some interesting and useful info in there.
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Old 19 Dec 2018, 08:33 pm
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Default Re: Overheating - ONCE???

Probably just some air in the system and that's happened to me before. If you look near the thermostat housing there's a bleeder valve and there's a special procedure to follow after the coolant system is filled or opened.
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Old 20 Dec 2018, 12:34 am
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Default Re: Overheating - ONCE???

Quote:
Originally Posted by soonercruiser View Post
Had a strange occurrence of OVERHEATING yesterday, when I was just about all done "patrolling" the neighborhood and hiding packages.

Since I bought the 2003 Panel Cruiser, I have had just about every major mechanical system looked at or serviced.
Just like my other turbo Crusiers, the engine temp just sits there half way up the gauge.

But, last night, as I was about to head home, I pulled out info some traffic, hitting the turbo hard, just to turn into the next neighborhood street.
As I start down the street the engine warning chime goes off, and the temp gauge is SPIKED!

I looked under the hood, and underneath, and saw nothing.
There was a few drops of coolant coming off the passenger side of the radiator bottom; but, I figured that was probably the overflow.

So, after simply walking the last 2 streets, I come back to drive home quickly and everything is now "NORMAL"!
Radiator cap was holding pressure fine! (Was a few large clear bubbles that came up after I took the cap off. Color was clear and fine. No creamy stuff on the dipstick.)
No leaking!
I could not see any fluid level in the coolant reservoir; so I simply added some water.
Radiator replaced in 2013.

Today - EVERYTHING NORMAL, despite driving it a while this afternoon.
I bought more HOAT "ready to pour"...filled the reservoir most of the way up.
**And of course, just like my other Cruisers, she doesn't like being too full, and blows some off.

Funny thing is, I looked into the previous owner's records........nothing!
But, my Carfax report showed a lot of other "Dealer Service", including the thermostat was replaced in 2014 and 2016!
Hmmmm....

**So...correct me if you like....BUT I THINK THAT THE THERMOSTAT JUST GOT STUCK CLOSED in that on instance.
And, that is probably all I should address.
With everything you've put into this, I'd go the mile and 1) swap the stat for a new one 2) back flush it and replace the coolant with new and 3) most importantly open up the fan motor and check the brushes, or simply have done with it and replace the motor with a new one.

I'm not that up on US parts prices, but done DIY, I doubt you'd spend much more than 100$ all in.
Cheap insurance given what you've invested.
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Old 20 Dec 2018, 01:21 am
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Default Re: Overheating - ONCE???

Quote:
Originally Posted by rcktpwrd View Post
A thermostat is fairly cheap and not too hard to swap out... Also verify that the cooling fan is fully functional on both low and high speeds.
Thanks!
I forgot to mention that I have heard the secondary fan kicking in idling at stop lights.
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Have now owned 6 PT Cruisers = Me PT Crazy!
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Old 20 Dec 2018, 01:25 am
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Default Re: Overheating - ONCE???

Quote:
Originally Posted by _PTGT03 View Post
Probably just some air in the system and that's happened to me before. If you look near the thermostat housing there's a bleeder valve and there's a special procedure to follow after the coolant system is filled or opened.
Never heard of any special procedure...after the system has been opened up.

Can letting the overflow tank run dry cause air into the system?
I had assumed that when they "Checked" by cooling system, that they looked for coolant in the reservoir.
(I did mention that when I popped the rad cap that some bubbles did come up.)
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2003 PT Cruiser GT Panel Van Conversion as new day driver.

Have now owned 6 PT Cruisers = Me PT Crazy!
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  #8 (permalink)  
Old 20 Dec 2018, 01:29 am
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Default Re: Overheating - ONCE???

I would suggest doing an engine coolant pressure test. Make sure you don't have any coolant leaking out. You don't want to have the engine overheat again. These engines are not very forgiving.

If engine coolant pressure test is good double check to make sure your radiator cap is holding the correct pressure.

If the radiator cap checks out good check the hose between the radiator cap and the coolant reservoir tank. If this hose is leaking it can put air in the engine coolant system and force the coolant out of the engine coolant system.

Every two or three days I always open the hood to make sure the coolant level on the coolant reservoir tank is good and check the engine oil in both of my Pt Cruisers.
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Old 20 Dec 2018, 09:50 am
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Default Re: Overheating - ONCE???

Could be the thermostat or the rad cap. They are cheap enough, just replace them. Is the coolant old? As others said, it could also be air in the system.

As @RcktPwrd mentioned, verify that the cooling fan is working on both low and high. I had a month long escapade figuring out what the problem was. The fan was slowly dying over time so sometimes it would work and sometimes it wouldn't. Turn the A/C on full blast and you should hear it cycling off, low, high, low, off and repeating that cycle, even I'd the engine is cold.

Good luck!
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Old 20 Dec 2018, 11:19 am
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Default Re: Overheating - ONCE???

You've had six PT's. I'd think you'd be a cooling system expert by now.
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