Gil, Per the 1963 Service Manual, the Chrysler PN is 1879318 called Manifold Heat Control Valve Solvent. Maybe it's no longer available as a Chrysler part or maybe there is a replacement product? Mark Lindahl Barrington, IL ----- Original Message ----- From: <lettercars@xxxxxxx> To: <ajp0002@xxxxxxxxxxxxx>; <chrysler300@xxxxxxxxxxxxxxx> Sent: Wednesday, June 14, 2006 9:13 AM Subject: Re: [Chrysler300] Fwd: [FWDLK] Exhaust Manifold Heat Valve Ron and All: I just tryed to buy some from our local Chrysler dealer. They showed nothing like that. I was just about to ask the listserver where such a product would be found. Our local parts store showed Never Seize in a spray can, but I defered until I consulted the experts here on line. One of my F risers is starting to get a little grumpy and I definately do not want it to freeze up. I too remember the little squirt can of Mopar Heat Riser Solvent, but I don't seem to have any anymore. Thanks for your help. Gil Cunningham Tallahassee, FL In a message dated 6/14/2006 12:11:49 AM Eastern Standard Time, ajp0002@xxxxxxxxxxxxx writes: Ron, Chrysler Corp used to have a manifold heat riser solvent that came in a little rectangular metal can like 3 in 1 oil. It is a specific formula for heat risers. I assume that they still have it. It is great stuff. I used some several years ago to free up a frozen heat riser on my 300G. I put some on the heat riser, let it set for a week and it was starting to show some signs of movement. So, I put some more on and let it set for another week. It freed up and I was able to get total movement back. [Non-text portions of this message have been removed] To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm For archives go to http://www.forwardlook.net/300-archive/ Yahoo! Groups Links ------------------------ Yahoo! Groups Sponsor --------------------~--> Home is just a click away. Make Yahoo! your home page now. http://us.click.yahoo.com/DHchtC/3FxNAA/yQLSAA/8LmulB/TM --------------------------------------------------------------------~-> To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm For archives go to http://www.forwardlook.net/300-archive/ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Chrysler300/ <*> To unsubscribe from this group, send an email to: Chrysler300-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/