Charlie or anybody else, have a part number for the rods that were shown with the "heavier" or thicker base on the cup?? I don't know if it would help but it does look a little better to me.

                                                    Michael

Michael

Sandy Valley, NV

If the correct part number is MPR-73 that sounds like a Melling part number. If the pushrod is Melling thelength wouldbe7.967 length with a shaft OD of 5/16'.



The Clevite part number 215-4041 would have a length of 8.270 with a shaft OD of .313"



Clevite part number 215-4150 would have a length of 8.290 with a shaft OD of .375" This shows as a push rod for mopar



According to my Ford parts books;



54/55 Ford, part EBU 6565-B is 8.2969 length



54/55 Ford, EBU 6565-A is 8.13 length



56 Ford B6A-6565-B has length of 8.188



It would be very interesting to do a length measurement on the MPR-73 pushrod. IF it is substantianally shorter than the other push rods that could contribute to the rocker operation.



marv

I can take it by Don's and measure it. Will 7.967" be the overall length or the effective length?

They should be the correct length for G-heads. That's what I had ordered, anyway.


Lawrenceville, GA

The length would be the effective length. (ie) from the bottom of the socket to the tip of the ball.

Melling uses effective length, Clevite uses overall length.

marv

         Didn't know that, always thought it was just effective length. guess I never bought any Clevite pushrods.

Frank/Rebop

Bristol, In ( by Elkhart) 

If Mellings (& others) use effective length & Clevite uses overall length, now were are trying to compare apples & oranges.. Anyway, looking in Eickman's Y-Blk book, the shortest pushrods, (7.95" aprox) were used in E & F code engines apparently. The photo of them looks suspiciously like the damaged ones. Maybe they are to short for the application?. Some 1954-55 original long ones, at 8.11" (aprox.) are marked at the top with two ridges. 1956-59 are listed at 7.98" aprox. However, non of these are tubular as far as I know. Also Ford listed a H.D. replacement pushrod for E & F code use, # B7A-6565-A. No dimensions given however... Also, J. Mummerts lists 3 lengths & says to order by head year. Obviously if the engine has been decked or heads planed, the issue gets more involved.... Don't know if any of this helps, but I hope so..

Paul

Marv:

One of your statements caught my eye.  The mopar pushrod.  I wonder if the ball cup on a mopar pushrod is the wrong size, and whoever decided their mopar rods would fit Y blocks were only looking at length.  If the cup was too small, the ball would keep trying to wedge itself into the cup and possible finally fracture it.  I measured a used Y ball a couple days ago, it's .360" diameter.

John - "The Hoosier Hurricane"

Just measured new Elgin PR-73S pushrods cup and the widest diameter is 0.364". Total length of the pushrod is about 8.1" and cup depth is about 0.16". Then I measured the diameter from new adjusting screw ball and it is 0.360".


Tero from Nurmijarvi, Finland

56 Country Sedan, 61 F-100, 61 F-600, 55 F-620, 52 Mercury

http://www.dlc.fi/~teros

http://www.y-block.info

http://www.hollowheads.net

http://www.fordnationals.net

Found some factory info about Elgin pushrods:

http://catalog.elginind.com/app/Engine.asp?mfg=FORD+PRODUCTS&model=080&cat=Push+Rod



BTW, they offer also two different length of oil pump intermediate shafts:

http://catalog.elginind.com/app/Engine.asp?mfg=FORD+PRODUCTS&model=080&cat=Oil+Pump+-+Intermediate+Shaft


Tero from Nurmijarvi, Finland

56 Country Sedan, 61 F-100, 61 F-600, 55 F-620, 52 Mercury

http://www.dlc.fi/~teros

http://www.y-block.info

http://www.hollowheads.net

http://www.fordnationals.net

Thanks Marv for posting that info. That helps a lot.

                                 Michael

Michael

Sandy Valley, NV