I have one of those belt measuring devices. Mine is a Goodyear unit. Very simple to get an almost exact measurement of a belt's length. Also has a "notched" scale to give you an accurate measurement of both belt "width" and "depth". Picked it up at a swap meet several years ago. Believe it is the only one that I have seen for sale in many a year. Roger Schaaf ----- Original Message ----- From: Rich Barber To: 'John J. Hertog' ; 'Ray Jones' Cc: mallyn@xxxxxxxxxxxxxxx ; MJRAGUSE@xxxxxxx ; 'Chrysler300' Sent: Saturday, August 19, 2006 10:15 AM Subject: RE: [Chrysler300] The Belt Jumpin' Blues Ray's & John's comments are accurate and educational, as always. Thanks to both for same. The matched set concept may be part design, part marketing and part good sense. If only one belt fails, many owners might buy just one to replace it--probably not a good idea. Replacing both belts at the same time from similar source and stock should achieve a decent match, although not as good as a matched pair. I seem to recall a belt length measuring instrument with two curved ends. If these are still used at parts stores or shops, they could verify or help select a best match from the dealer's stock. Our 1955 C-300 has two pair of dual belts Gates 7390 and 7450. One to drive the fan and one to drive the generator. Unscientific thumb-press suggests similar, if not precise tension on each. The generator has the power steering pump on the backside of it. I wonder if the idea of double belts in this application is somewhat for redundancy. One might fail-and if it doesn't take out the other, the engine might keep on fanning or generating. The old single belts were getting huge and thick before the wholesale switch to dual belts. Belts must be getting better as I don't see so many in the road or big old iron parked beside the highway with hoods up and steam erupting. And the serpentine belts have become a standard and expensive maintenance item. Their thin grooves do tend to crack early. Finally, we used to watch for the Gates Mystery Motorist who would drive around with crappy belts. If the pump jockey discovered the bad belt and suggested replacing it with a Gates belt, he could win $100, or something like that. The owner of the Phillips 66 station where I worked won once. We pump jocks very seldom even looked while checking the oil and didn't give that much attention when lubing the car. C-300'ly, Rich Barber Brentwood, CA 1955 C-300 -----Original Message----- From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On Behalf Of John J. Hertog Sent: Saturday, August 19, 2006 9:20 AM To: 'Ray Jones'; 'Rich Barber' Cc: mallyn@xxxxxxxxxxxxxxx; MJRAGUSE@xxxxxxx; 'Chrysler300' Subject: RE: [Chrysler300] The Belt Jumpin' Blues Ray is perfectly correct - a matched set of belts consists of two "adjoining" belts cut off from the same piece of belt stock. Kinda like two adjoining slices of boloni as they come off the meat slicer. This was standard practice back in the 60's and, if you look at an old Gates belt application book, you will find a notation stating that "matched set required" I don't even know if matched sets are still available today.. John Hertog [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 I choose Polesoft Lockspam to fight spam, and you? http://www.polesoft.com/refer.html [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 <*> 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/