In an emergency, this will work (for a while), but sooner or later you are going to have to deal with the rotten place in the core, whether it is the radiator or the heater core. The stop leak chemicals will also clog up small passages in your cooling system, if they are used repetitively. I'll confess to having done this a few times myself (and yes, I carry a package of the powdered aluminum stuff in my tool box whenever I travel), but only to get home to where I can address the real problem. Dick Benjamin -----Original Message----- From: mailing-list-owner@xxxxxxxxxxxxxxxx [mailto:mailing-list-owner@xxxxxxxxxxxxxxxx] On Behalf Of ViaJoaquin@xxxxxxx Sent: Friday, December 10, 2004 10:49 AM To: mailing-list@xxxxxxxxxxxxxxxx Subject: Re: IML: Smoke on Dash equals Heater Coil leak Has anybody tried cooling system stop leak? In my experiences the powdered alumenum type has always worked well. Even on a radiator with a plastic tank! But I have never had a leaking heater core. Roy 67 Crown FDHT ----------------- http://www.imperialclub.com ----------------- This message was sent to you by the Imperial Mailing List. Please reply to mailing-list@xxxxxxxxxxxxxxxx and your response will be shared with everyone. Private messages (and attachments) for the Administrators should be sent to webmaster@xxxxxxxxxxxxxxxx To UN-SUBSCRIBE, go to http://imperialclub.com/unsubscribe.htm ----------------- http://www.imperialclub.com ----------------- This message was sent to you by the Imperial Mailing List. Please reply to mailing-list@xxxxxxxxxxxxxxxx and your response will be shared with everyone. Private messages (and attachments) for the Administrators should be sent to webmaster@xxxxxxxxxxxxxxxx To UN-SUBSCRIBE, go to http://imperialclub.com/unsubscribe.htm