Plastic heater core connectors ????

My daughter had an 81 Chevy Citation and I was surprised to hear that the tailpieces of the heater core to which the heater hoses connected were plastic.
1) How long has this been going on ? 2) How many other car makers do something this stupid ? 3) Is this a cost cutting measure on the manufacturer's part ? Must be since I read that the replacements come as all brass like years ago. 4) How common is it for these to break on older cars ? 5) Is the only fix a heater core replacement = $$$$ ?
TIA
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
Zing wrote:

Since 1981.

All of them.

Yes.
Not true. Few are brass. Most are plastic or aluminum.

It happens. "Common" is a relative term. Everything will fail eventually.

Yes.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
wrote:

that
connected
I changed my 83 chev core and the old was brass/copper and so was the new from NAPA.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
GM might of started using plastic around 1980?
My 89 Cavalier Z 24 heater core split open ( luckily ) while backing up the drivewway one night after returning from the theater at 2 am. Anitfreeze pour out at a rapid rate all over the driveway thanks to the drain tube in the firewall. The plastic heater hose pipe broke right off the side tank. The core was 8 or 9 years old.
My 91 Bonneville heater core is also has plastic tanks & aluminum core. It had a very slow seepage leak that sealed itself up for awhile. Upon replacing the ECM in 2004, I noticed some dried up residue on the bottom of the HC cover under the dash. About two months later, wetness began showing so I replaced the core. It was 13 years old.
Its is probably cheaper to make plastic rather than all brass or all aluminum. Also reduces weight which manufacturers are always trying to shave off cars.
Good Luck
Harryface ؿ 1991 Pontiac Bonneville LE 300,811 miles
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.