PT GT blowing water into overflow when normal temp?

Asked by Sep 09, 2015 at 02:05 PM about the 2003 Chrysler PT Cruiser GT

Question type: Maintenance & Repair

I've replaced the head gasket,radiator, took thermostat out, new 18 lb cap. Can
you install a higher pressure cap then the 18 lb?

11 Answers

BTW, the car runs great, no overheating at all until it starts running low on water at about 100 miles. It will boil out a gallon /100mi

82,835

Adding more water than coolant will decrease the boiling point, do you have a 50/50 mix? did you bleed the system, check to see if the return may be clogged..

7,240

My calculations are coming out to an engine temp of well over 245f. so you are well above the safe heat range of that engine. You must have a small leak in your cooling system ... if you put a cap on that's any higher then you will either blow the radiator core, the hose or both ... I would never go higher than 15 lbs ... Have the radiator pressure checked ... I can guarantee your not sealed

I originally bled the system, then decided to remove thermostat completely, well took center out of it, so, no air in system problem, and yes, it would take a water temp of 245* to open an 18 lb cap, so why would the water get thru the cap at normal operating temperatures. Bathroom scales confirm that the cap does take 18lbs to open. Still baffled.

Oh, and it did the same thing with a 50/50 mix. Straight water now what with using a gal/100 mi

I suppose that if it's getting combustion gas into the water system that it would be easy to open the cap. It doesn't show anything like that at idle with the cap off.

7,240

You still have a small leak ... Here is the clue "Water cannot boil under pressure"

And even w/o pressure, it wouldn't boil before 212*, but I know it's blowing out all around my new cap and filling the overflow bottle. It will idle forever w/o overflowing or dropping any water on the driveway.

7,240

When water ( liquid) boils it expands to about 3000-1. To prevent water from boiling it becomes pressurized over 211F and remains a liquid because you can't cool anything with steam. If you know any steam pressure you can find the temperature by going to a "steam Table" thus 18 lbs of steam is about 250 degrees F. To me, it's obvious that you only have over 18lbs of pressure or the coolant would not go to the overflow. ... that means the water is boiling inside the radiator then the expansion is increasing pressure .... your system has a small leak

Yep, and it must be an internal leak into the cylinders which is being burned off slowly because there is no white smoke

345

Is the electric fan working? Turn on the AC and test it. Fans run during AC, that is if the compressor actually works too. There's a pressure sensing switch on the high side of AC that signals the fans ON. No pressure ... no fans either.

Your Answer

Add photo

Related Questions

  • why is my pt cruiser overheating.water bubbling and shooting all the water back to the resorvor and dump it out in the over. 11 answers

    I have a 02 pt cruiser change waterpump.thermostat radiator.hoses heater hoses clean heater coil.now heater works.didnt work before.bleed air out system.still overheats.water bubbles to radiator cap...

    2002 Chrysler PT Cruiser Limited

    -

    Maintenance & Repair

  • If water is low do to a leak, why doesn't the gage go up? 2 answers

    Been as low as a quart of water but the temp gage never went above normal...is there a sensor not doing or doing something to cause this?

    2003 Chrysler PT Cruiser Base

    -

    Maintenance & Repair

  • 2001 PT Cruiser coolant light 2 answers

    My wife's 2001 PT is occasionally giving a coolant light and last time started getting hot. Only happens when driving in town and when she shuts it off for about 30 minutes light goes out. All rea...

    2001 Chrysler PT Cruiser Limited

    -

    Maintenance & Repair

  • Overheating problems 62 answers

    So my wife's 2002 cruiser runs hot and overheats when idle too long (drive thru, red light etc.). Checked debris between condensor and fan, fan works, coolant full, thermostat works, all relays good, ...

    2002 Chrysler PT Cruiser

    -

    Maintenance & Repair

  • Overflow Boling 4 answers

    Gauge in car Reads normal. But when u cut off car you can hear it boiling in overflow. Has a new tremstate . New water pump

    2002 Chrysler Sebring LX Convertible

    -

    Maintenance & Repair

PT Cruiser

Looking for a Used PT Cruiser in your area?

CarGurus has 3,897 nationwide PT Cruiser listings starting at $1,795.

ZIP:

Search Chrysler PT Cruiser Questions

Chrysler PT Cruiser Experts

#1 Tom Demyan
Tom Demyan
Reputation 1,770
#2 Gypsy Rose
Gypsy Rose
Reputation 1,160
#3 docwade931
docwade931
Reputation 1,030
View All

Related Models For Sale

Used Volkswagen Beetle
252 Great Deals out of 8,613 listings starting at $1,500
Used Chrysler Sebring
53 Great Deals out of 3,682 listings starting at $1,895
Used Chrysler Town & Country
707 Great Deals out of 20,383 listings starting at $1,995
Used Honda Accord
1,205 Great Deals out of 77,328 listings starting at $700
Used Ford Focus
1,275 Great Deals out of 58,371 listings starting at $1,300
Used Ford Escape
1,699 Great Deals out of 85,763 listings starting at $1,350
Used Ford Mustang
727 Great Deals out of 38,165 listings starting at $1,750
Used Honda Civic
1,131 Great Deals out of 63,725 listings starting at $995
Used Toyota Corolla
1,298 Great Deals out of 67,024 listings starting at $1,595
Used Ford Explorer
1,403 Great Deals out of 72,076 listings starting at $985
Used Toyota Camry
1,432 Great Deals out of 99,711 listings starting at $700

Used Cars For Sale

2006 Chrysler PT Cruiser GT For Sale
24 listings starting at $2,995