PT Cruiser Forum  
Advertisements
       

Go Back   PT Cruiser Forum > General Forums > Tech & Performance Forum

PT Cruiser Forum

Advertisements
Replaced heater core still overheating

 
Like Tree4Likes

Reply
 
LinkBack Thread Tools Display Modes
  #1 (permalink)  
Old 02 Oct 2012, 06:37 am
Fresh Cruiser
 
Join Date: Sep 2012
Posts: 3
Default Replaced heater core still overheating

I have 2004 pt and replaced the water pump, thermostat, and the heater core twice. When I bypass the heater core no problem but with it hooked up it overheats, it leaks fluid on the inside of the car and on the outside. There is a tube that comes out of the firewall that drips water/antifreeze once the car gets hot. Im at a loss as to what to look at replacing next. I read on one thread the radiator my question is would it not still overheater even with the heater core bypassed. Im open to suggestions. This is getting very expensive as this may be the third time the heater core has to be replace . Since it is overheating / leaking Im assuming it will need to be replaced also.
Help please.
Reply With Quote
  #2 (permalink)  
Old 02 Oct 2012, 07:12 am
Obsessed Cruiser
 
Join Date: Sep 2001
Posts: 27,744
Default Re: Replaced heater core still overheating

Once you replaced the core, I don't know why you didn't start looking at other options. One core replacement is enough. Look at the lines/tubes for a blockage and double check the connections to the core.

Simple, if you bypassed the core and it doesn't overheat, then the problem is the coolant getting into/out of that area not letting the coolant cool off the engine. That's the way I see it anyway.
__________________
Rules of the forum have been updated as of *07/07/2019* Please read them over.

- All decisions by the Moderator are semi-permanent, can and may be changed at his discretion but definitely will be the final word. Any action performed by the Administrator or Moderators are not to be discussed on the forum.
Reply With Quote
  #3 (permalink)  
Old 02 Oct 2012, 09:15 am
Veteran Cruiser
 
Join Date: Mar 2012
Location: darien il
Posts: 4,592
Default Re: Replaced heater core still overheating

Faint coolant smell inside

i'd assume you need to purge the air out properly. when you bleed the coolant system the heat knob is supposed to be set to hot and the fan set to high. otherwise the heater core is cutoff from the system and air will remain trapped in there.
Reply With Quote
  #4 (permalink)  
Old 02 Oct 2012, 08:22 pm
Fresh Cruiser
 
Join Date: Sep 2012
Posts: 3
Default Re: Replaced heater core still overheating

I replaced the heater core a second time due to it leaking inside the car. It was fogging up the windows, steam coming out of vents and dripping on carpet. Once replaced it ran ok for about a month, spring came so I disconnected the hoses from the heater core tied them together and had no heating issues during the summer, now it is fall getting cooler and I reconnected the hoses to the HC to have heat, now it is overheating and whatever the tube in the firewall is continnually drips. If the problem is in the line would it not over heat all the time? Im really dumb to this stuff and have taken it to a mechanic who replaced the thermostat waterpump, and heatercore. He says its just cheapmade platic cores going bad, but I think there has to be other issues.
Thanks for any input
Reply With Quote
  #5 (permalink)  
Old 02 Oct 2012, 09:10 pm
Busted_PT's Avatar
Obsessed Cruiser
 
Join Date: Jan 2012
Location: Beckley, W.V.
Posts: 13,895
Default Re: Replaced heater core still overheating

Quote:
Originally Posted by wess View Post
I replaced the heater core a second time due to it leaking inside the car. It was fogging up the windows, steam coming out of vents and dripping on carpet. Once replaced it ran ok for about a month, spring came so I disconnected the hoses from the heater core tied them together and had no heating issues during the summer, now it is fall getting cooler and I reconnected the hoses to the HC to have heat, now it is overheating and whatever the tube in the firewall is continnually drips. If the problem is in the line would it not over heat all the time? Im really dumb to this stuff and have taken it to a mechanic who replaced the thermostat waterpump, and heatercore. He says its just cheapmade platic cores going bad, but I think there has to be other issues.
Thanks for any input
First off what possessed you to unhook the heater core to begin with. If it wasn't leaking. Assuming you actually got a new one and not a block seal job. You most likely broke it removing and installing the hoses. In the process allowing air and the leak to cause an overheating issue. If you have been doing this on a regular bases then this would explain you you have had an extraordinarily high number of heater cores leak.
Badglas likes this.
__________________

03 Dream stock___________________________ 04 Touring turbo lite stock_________ 02 Touring stock_____________________ The "Three Amigos"
__________________________________________________ __________________________________________________ ___________Performance, Body and Service, OEM

This Is my project page.
http://www.ptcruiserlinks.com/forum/...oject-1-a.html

This is a great read from one of our own! Badglas
badglas.blogspot.com
Reply With Quote
  #6 (permalink)  
Old 03 Oct 2012, 06:33 am
Fresh Cruiser
 
Join Date: Sep 2012
Posts: 3
Default Re: Replaced heater core still overheating

The reason I unhooked the hoses is because it was starting to leak/have that radiator smell inside the car and the windows fogging up/becoming greasy from the antifeeze. It was spring so I unhooked the hoses. The first time the heater core was replaced It worked maybe 3 weeks, then I took it back to the mechanic and he replaced it. This ran throughout winter but then as spring started to come around it started leaking. So I unhooked it ran through the summer now I have rehooked. What is causing the heater core to continue to leak? Is it because of the plastic and metal design as the mechnic told me? Is it the radiator like I read in another post? Or something else? I dont know where to start looking or even if I should continue to trust this guy. Ive read on here this seems to be a common problem. Like Ive said eariler replace waterpump, thermostat, and heater core. Why does it run hot when heater core is connected but fine when it is not? If the radiator was bad would it not run hot all the time? Im not even a back yard mechnic, but I do ask for your experience so I have an idea what to ask the mechnic to look for. All I want is some heat this winter without the car running hot and leaking the fluid.
Reply With Quote
  #7 (permalink)  
Old 03 Oct 2012, 07:29 am
Ray_Dockrey's Avatar
Senior Cruiser
 
Join Date: May 2012
Location: Mustang, OK
Posts: 1,213
Default Re: Replaced heater core still overheating

First, I would find another mechanic. Heater cores are not a common issue. Not that I have seen. Yes overheating is. My guess is that when you hook the heater core back up it is overheating due to loosing coolant and you probably have air in the system. These cars are hard to bleed all the air out.

I would have a different mechanic replace the heater core. Then go from there.
Busted_PT likes this.
Reply With Quote
  #8 (permalink)  
Old 03 Oct 2012, 08:02 am
Busted_PT's Avatar
Obsessed Cruiser
 
Join Date: Jan 2012
Location: Beckley, W.V.
Posts: 13,895
Default Re: Replaced heater core still overheating

Quote:
Originally Posted by Ray_Dockrey View Post
First, I would find another mechanic. Heater cores are not a common issue. Not that I have seen. Yes overheating is. My guess is that when you hook the heater core back up it is overheating due to loosing coolant and you probably have air in the system. These cars are hard to bleed all the air out.

I would have a different mechanic replace the heater core. Then go from there.
Like Ray said get you another guy. Seems they most likely didn't give you a new one to start with. Once is as common as it gets. And the heating is as Ray said.

Sorry about the grumpy post But here is the skinny on the problem.

When you have a leak it forces water out when hot then when it cools of it sucks air in instead of pulling from the resavior. The leak also lowers the boiling temp of the water by lowering the pressure in the system. This is why you are also over heating. It's all from the leak.
__________________

03 Dream stock___________________________ 04 Touring turbo lite stock_________ 02 Touring stock_____________________ The "Three Amigos"
__________________________________________________ __________________________________________________ ___________Performance, Body and Service, OEM

This Is my project page.
http://www.ptcruiserlinks.com/forum/...oject-1-a.html

This is a great read from one of our own! Badglas
badglas.blogspot.com

Last edited by Busted_PT; 03 Oct 2012 at 09:05 am.
Reply With Quote
  #9 (permalink)  
Old 03 Oct 2012, 01:08 pm
UptownSport's Avatar
Veteran Cruiser
 
Join Date: Jan 2011
Location: 55403
Posts: 3,912
Default Re: Replaced heater core still overheating

Controls have no authority over heater core flow whatsoever-
The heater core is of the 'constant flow' design, unlike other vehicles which limit or shut off flow. (Core doubles as a 'bypass' so thermostat has coolant flowing past)
Ray_Dockrey likes this.
Reply With Quote
  #10 (permalink)  
Old 04 Oct 2012, 10:41 pm
Veteran Cruiser
 
Join Date: Mar 2012
Location: darien il
Posts: 4,592
Default Re: Replaced heater core still overheating

Quote:
Originally Posted by UptownSport View Post
Controls have no authority over heater core flow whatsoever-
The heater core is of the 'constant flow' design, unlike other vehicles which limit or shut off flow. (Core doubles as a 'bypass' so thermostat has coolant flowing past)
learn somethin' new every day (:
Ray_Dockrey likes this.
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Heater core TMas777 Tech & Performance Forum 8 13 Oct 2011 04:31 pm
Heater core in o3 pt bryanschacht General PT Cruiser Discussions 4 02 Feb 2011 06:04 pm
More heater core questions ddash General PT Cruiser Discussions 0 20 Sep 2010 02:23 pm
Heater core and rad replacement ddash General PT Cruiser Discussions 4 14 Sep 2010 06:35 pm


All times are GMT -5. The time now is 06:15 am.




Powered by vBulletin® Version 3.8.2
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
LinkBacks Enabled by vBSEO 3.6.0 PL2 © 2011, Crawlability, Inc.
vB.Sponsors