My 67 Crown has a Tefba filter installed in the upper radiator hose to filter all debris from getting into the radiator. My 68 has the Gano filter for the same purpose. I prefer the design of the Tefba filter but the company was either sold or moved their operations to Australia. Here is a web site with information on ordering from Australia. http://www.mako.com.au/auto/tefba.htm There used to be a U.S. distributor in Texas for these but has stopped because the people in the Australian office were, shall we say, less than desirable to deal with. Another member from our local Imperial club made efforts to deal with the Australian company will less than favorable results. I've not dealt with them personally. All my information is from others. This web site is for the Jag owners but is has a pretty detailed explanation of how the filters work as well as the contact information for the Gano filter company in California. http://www.jag-lovers.org/xj-s/book/CoolantFilters.html When I called the Gano filter company (Gano filter is on my 68 LeBaron) they were pleasant and easy to work with. Not current with user friendly technology though. (no web site, no credit cards) The policy for them is: You call them and order a filter, sent them a check, they send you a filter. Mine cost $33 (that includes the shipping). The Tefba filter is twice that amount, plus shipping from Australia. If you want to see the two different filters installed on my cars you can go to my personal web site at http://langfamily.net2go.com and click on the icon labeled 'coolant filters', then look at the pictures. Ken 67 Crown 4 Dr Ht 68 LeBaron 4 Dr Ht -----Original Message----- From: mailing-list-owner@xxxxxxxxxxxxxxxx [mailto:mailing-list-owner@xxxxxxxxxxxxxxxx] On Behalf Of therichardsonfamily@xxxxxxxxxxx Sent: Tuesday, February 20, 2007 6:55 PM To: mailing-list@xxxxxxxxxxxxxxxx Subject: Re: IML: colling system pressure? OK, thanks for everyone's input on the water jacket pressure question. I think Dave's experience with head gasket failure with water pressure at 30-40 psi will make me pull the thermostat and run the water through with the system "open". Following a good flushing, I will probably throw in an old radiator and do the "Cascade" cleaning. I do like the filter idea. Ken, will you share your info with the list regarding a source? Thanks again everyone for your help. I'll be back with more questions. Dan Richardson 300L Family Heirloom -------------- Original message ---------------------- From: sosmi@xxxxxxxxxxx > Dan, if you leave the T-stat in the the water flow would be so low, it will do > no good. That could also raise pressures to an un-safe level. To get the most > volume of water flow, the T-stat needs to be removed, don't worry about engine > temp, just flow the water.Dave. > > -------------- Original message -------------- > From: therichardsonfamily@xxxxxxxxxxx > > > Dave, et al: > > > > I kind of wanted to leave the thermostat in - to allow the engine to reach > > operating temps and maybe loosen some of that junk up. Then just let it come > > out the upper hose, and all over my feet. I don't want to blow any gaskets > > though. > > > > So... any thoughts on 30+ psi through the cooling system in the block? Or > > should I just be safe? > > > > Dan Richardson > > 300L Family Heirloom > > ----------------- 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