Re: {Chrysler 300} 1962 Water Pump & Fan Clutch

I have couple of impellers for sale, booth a/c and non a/c, 6 vs 8 vanes.

Gary the parts doc

From: 'James Douglas' via Chrysler 300 Club International

Sent: Tuesday, March 07, 2023 5:38 AM

To: Dyke Ridgley ; mplindahl@xxxxxxxxxxxxx

Cc: D.C. Mason ; G VERBERKMOES ; Chrysler 300 List Server

Subject: Re: {Chrysler 300} 1962 Water Pump & Fan Clutch

One of the known issues with the water moving too fast is that the water stratifies in the tube column in the radiator. The resistance between the water layer against the tube moves slower and the inner layer moves much faster and therefore does not transfer its heat through the boundary layer of water to the tube wall.

I have my cores made by a shop here in Northern California that uses a dimple tube. The dimples cause the water to “tumble” and as such is breaks up the layers and causes mixing even at higher speeds.

James

From: chrysler-300-club-international@xxxxxxxxxxxxxxxx <chrysler-300-club-international@xxxxxxxxxxxxxxxx> on behalf of Dyke Ridgley <ridgleyracing65@xxxxxxxxx>
Sent: Monday, March 6, 2023 1:43:19 PM
To: mplindahl@xxxxxxxxxxxxx <mplindahl@xxxxxxxxxxxxx>
Cc: D.C. Mason <petergriffinforpresident@xxxxxxxxx>; G VERBERKMOES <zzub@xxxxxxx>; Chrysler 300 List Server <chrysler-300-club-international@xxxxxxxxxxxxxxxx>
Subject: Re: {Chrysler 300} 1962 Water Pump & Fan Clutch

We deal with pumps running too fast all the time in our vintage race engines. These engines spend most of the time between 5-8,000 rpm and we always have to slow the pumps down (larger pulleys) so the water going through the radiator has time to give off its heat. Yes, you can definitely move TOO MUCH water through an engine and cooling system.

Ridgley Racing

5500 Walmsley Rd

Decatur, IL 62521

217-865-2300 p

217-865-2309 f

On Mon, Mar 6, 2023 at 12:33 PM <mplindahl@xxxxxxxxxxxxx> wrote:

Hello All,

I am having a hard time accepting the principal that more vanes make the water move faster and therefore, the heat is not dissipated as fast. This does not seem logical.

For every cubic volume of water, the heat loss is less with faster moving water, but the water is moving faster so the total amount of heat removed would be the same or more. Think of throwing a hot brick into a fast moving stream vs. a slow moving stream.

300ly,

Mark Lindahl

From: chrysler-300-club-international@xxxxxxxxxxxxxxxx <chrysler-300-club-international@xxxxxxxxxxxxxxxx> On Behalf Of D.C. Mason
Sent: Monday, March 6, 2023 12:01 PM
To: G VERBERKMOES <zzub@xxxxxxx>
Cc: Chrysler 300 List Server <chrysler-300-club-international@xxxxxxxxxxxxxxxx>
Subject: Re: {Chrysler 300} 1962 Water Pump & Fan Clutch

Matt/George,

The Napa pumps I have been using (42032) have six vanes (pictured). Maybe these are for the a/c cars as Don mentioned fewer vanes. These have worked fine on non-a/c cars too but may not be ideal. I’ll check with Napa to see what the options are.

George that is good info about your problem- I wouldn’t have thought the spacing between the fan clutch and radiator would have been significant at highway speeds- seems it would be dwarfed by the airspeed of wind coming in at 70 mph (whether or not fan spins at all seems almost negligible at that speed). So the closer clearance to your radiator sounds critical for higher speeds unless a red herring…

V/r

D&K

Sent from my iPhone

On Mar 6, 2023, at 12:15 PM, G VERBERKMOES <zzub@xxxxxxx> wrote:

Hey Guys…Check the distance of the fan-clutch vanes to the radiator. I had the original fan-clutch that came with the car when I purchased it. I decided I should get a new fan-clutch so I took the old one to NAPA and we went through their fan-clutches and found one that matched the one I had. Come to find out the original fan-clutch I had was incorrect. Installing a thermal fan-clutch with the vanes of the fan-clutch 1/2 inch away from the radiator solved my 28 year old overheating problem.

I’ve had my 1965 300L with A/C for close to 30 years. When I first purchased the car it had a flex-fan and it was very noisy so I went back to the original fan and fan-clutch. I then started having overheating problems. At 60-65 MPH the temperature ran right around 190 degrees; if I tried to keep up with freeway traffic 70-75 MPH the temperature would shoot up to 230-235 degrees. I would then slow back down and temperature would go back down. For 28 years I messed with this problem. I live in the San Diego area and over the years I have made countless trips to Phoenix AZ, 700 miles R/T, to the Carmel Meet, Placerville Meet, Alamogordo Meet, two Las Vegas Meets. All the time driving 60-65 MPH. I installed Hi-flow water-pumps, four-row radiator, centrifugal-clutch then went back to OEM configuration. The engine was rebuilt 23 years ago with a salvaged Imperial 413 block. Same problem. For 28 years I drove 65 MPH!

Just before the Pasadena Meet the thermal fan-clutch went out. I got pretty good at changing fans, water pumps and fan-clutches. I got a new thermal fan-clutch from O’Reilly’s and installed it. The vanes on the old clutch were over an inch away from the radiator. The new clutch vanes were 1/2 inch from the radiator (same as my '64.) What a difference! The car no longer overheats! I drove to the Pasadena Meet 125 miles at 70-80 MPH and temperature never went above 210 degrees.

300 Regards...George Ver Berkmoes

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