A/C units do have (6) six vein impellers and the non-A/C had (8) eight. I was told they turn the a/c pump at higher rpm's. That would mean the pulley diameters are different for a/c. All the more reason to use roller bearings. Maybe the differences could be a good tech article on the club site. I could get photos of the 6 & 8 impellers. Thank you, Gary, the parts doc Reno, Nevada 89521 USA The Biggest Little City In The World Mail: garythepartsdoc@xxxxxxxxxxxx 775 851-1420 -----Original Message----- From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx]On Behalf Of Jerry Lindsay Sent: Wednesday, November 10, 2010 6:35 AM To: zephyr9900@xxxxxxxxxxx; Chrysler300@xxxxxxxxxxxxxxx; Mark Souders Subject: Re: [Chrysler300] 300F Water Pump Sorry, Mark's right. I was referring to the number of impeller blades inside the water pump. My A/C units had (6) six implellers and the non-A/C had (8) eight. Go figure that out. I took off the water pumps on all the (10) I had at that time and the numbers held true troughtout all of them. Jerry Lindsay ----- Original Message ----- From: Mark Souders To: zephyr9900@xxxxxxxxxxx ; Chrysler300@xxxxxxxxxxxxxxx Sent: Wednesday, November 10, 2010 8:50 AM Subject: Re: [Chrysler300] 300F Water Pump I think he's referring to the blades on the impeller. Those little thingys that actually move the water. Mark -----Original Message----- From: Herb <zephyr9900@xxxxxxxxxxx> To: 300 Club International <Chrysler300@xxxxxxxxxxxxxxx> Sent: Wed, Nov 10, 2010 8:44 am Subject: Re: [Chrysler300] 300F Water Pump ater Pumps don't have blades, the fan attached to the clutch assembly, that s subsequently attached to the pump have blades. ------Original Message------- rom: Jerry Lindsay ate: 11/10/2010 6:51:27 AM o: tdcox 300aircleaners; chrysler300@xxxxxxxxxxxxxxx; christopher beilby ubject: Re: [Chrysler300] 300F Water Pump hen I recently got my 62-413 running, I replaced the water pump as I didn't want or didn't know how good the old pump was. The first one I got had a air line crack in it that my buddy helping spotted. Then the seconf one had a different number of blades in it. I found out the A/C water pumps had ifferent number of blades. I can't remember what that number was, but that he three A/c units were differnt then the non A/C ones. Perhaps others members can shed a different light on it and that I just had ifferent number of blades was a odd happening. At any rate, that's my tory. Jerry Lindsay Seminole, Fl. Nice cool weather for a change. ----- Original Message ----- rom: "christopher beilby" <thelastbestgenius@xxxxxxxxxxx> o: "tdcox 300aircleaners" <tdcox@xxxxxxxxxxxxx>; chrysler300@xxxxxxxxxxxxxxx> ent: Wednesday, November 10, 2010 2:58 AM ubject: RE: [Chrysler300] 300F Water Pump No one else said anything yet, so It might be total wrong, as it does not ake sense even to me, but if it a new/rebuilt orig 60s motor, could it be ost rebuild, you have now suddenly dislodged a heap of sludge/rust from the lower block areas that has broken away while motor out/dry, and this has locked the flow somewhere - or else something non rust/sludge, like the hermostat is jammed shut?! Whatever the cause, it sounds like the pump is being overloaded, like the mpellor is being 'turned off' by backed up/solid water?!! Check thermo and then also top of radiator tank to see all little flow oles, tops of tubes, are clear, as start points. Christopher in Australia - cool weather still amazing/weird for this time of late spring, locusts slowed/stalled by the cold nights, so southern winter rain crops still going great so far and harvest just anout to start abd run through to near xmas in some slower/cooler areas To: chrysler300@xxxxxxxxxxxxxxx rom: tdcox@xxxxxxxxxxxxx ate: Tue, 9 Nov 2010 10:51:05 -0800 ubject: [Chrysler300] 300F Water Pump I traveled to the Chicago meet in my F convert, during which I threw at east wo water pump belts. Upon arriving in Chicago, several guys that know a lot ore than I do about the F engine noticed that the fan pulley was not lined p ith the crank pulley. All suggested shimming out the fan pulley which we id y about 3/16". I drove home and all seemed well; no belts thrown and car an ine. After arriving home, the engine was properly broken in and I began to ncrease he speeds I drove. Shortly thereafter, the water pump failed as I slowed own rom about 4,000 rpms. I did have another water pump in the trunk and I eplaced t. Within 50 miles, that water pump failed while driving about 60 mph on the nterstate, taking out the radiator. So, I bought a NAPA replacement water pump, replaced the water pump with ailed earings, had the radiator repaired and installed, cranked it up and it dled icely for about 30 minutes, at which time I shut it down. Upon start-up, he ew NAPA water pump failed. I am at a loss at what to do. The belts are not too tight. My only thought s hat shimming out the water pump may have put too much stress on the water ump ith a fairly heavy fan/clutch assembly. Any other suggestions?? I can't fford nother radiator rebuild and I am afraid to drive the car any distance. I an't nderstand why I could drive the car nearly 1,000 miles with the shimmed out ulley, yet I can't keep a water pump operating without the bearings ailing. elp!!! [Non-text portions of this message have been removed] [Non-text portions of this message have been removed] ------------------------------------ To send a message to this group, send an email to: hrysler300@xxxxxxxxxxxxxxx To unsubscribe from this group, send an email to bob@xxxxxxxxxxxxx or o to http://autos.groups.yahoo.com/group/Chrysler300/join and select the Leave Group" button For list server instructions, go to ttp://www.chrysler300club.com/yahoolist/inst.htm For archives go to ttp://www.forwardlook.net/300-archive/search.htm#querylangYahoo! 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