If you take the heater core out of your truck and take it down to a Radiator Shop they should be able braise the old nipple back into place. Have them check it over when they are done. If your old heater core is in bad shape you're better off to know about it now, rather than after you go to the trouble of reinstalling it, only to have it go in another 250 miles. After all there is a reason why it broke in the first place... the metal may be getting fatigued due to age. Mew ones aren't that too terribly expensive. Good Luck, Jim.
take out the glove box
Labor: $50.00-100.00 With you buying the part.
you have to remove the dash and steering column then the heater box I have done many and its at least 1.5 days to do.
In order to probably repair the heater core in your 2000 New Beetle, you will probably have to get the entire heater core replaced.
check and make sure that the hose clamps are tight mine was leaking at the bottom of the hose replaced heater core for nothing
You have to remove the entire dash board to gain access to the heater core.
The heater blower for a 2002 Chevy Silverado is mounted under the dash. It is on the passenger side, in the heater housing.
the heater core is accessed from under the hood it is a nasty time consuming task. lift the hood and see the heater assembly against firewall. remove all that to get at the heater core
The heater inlet hose is on the firewall. On the 2002 Silverado it is close to the bottom of the firewall on the passenger side.
take out the heater core then put the new one the same way you took out the old one.... Good Luck!
The most likely reason that the heater control won't change the air flow is that the cable that moves the diverter valve has broken and will need to be replaced.
Unfortunately, there is no "easy" way to change the heater core. The entire dash board has to come out. then it's easy. Then you have to put the dash back in. Sorry :(