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I ran across a king pin reamer that's marked (hand-written) "1937 Chevrolet Master", but measures only approx. .732" in diameter. The '37 king pins were .867", so I'm guessing this reamer is for earlier, lighter Chevrolets. Can anybody tell me what year Chevys used a .732" diameter king pin?? Thanks,  -Bob
-BowTie Bob
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Shade Tree Mechanic
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Bob- My reamer is .868, and says 1934-54 Chevrolet cars with independent wheel suspension; 1/2 ton trucks 1941-59. That narrows it down a little. Did Master series (straight axle) have smaller diameter pins?
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The 0.736" reamer fits 1928-33 except with knee action and 33-4 Plymouth.
How Sweet the roar of a Chevy four!
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WOW !! You guys are TOO much! Thanks for the information. This chatroom is sure unmatched for getting answers and so quickly. I think you answered my question within 45 minutes - what took so long???  Many, many thanks, -Bob
-BowTie Bob
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chevstuff: Interesting that your reamer is marked for "1934-54 Chevrolet cars with independent wheel suspension", as is my reamer. The interesting thing is, I have a two sets of NORS king pins, one manufacturer's label states the one set as being for the Master and the other for the Master-Deluxe 1937 Chevrolets. Both mic up at .867" -.8675" diameter, with the difference being in length: the M-D pins are 5-19/32" (5.594") long and the Master pins are 5-5/16" (5.313") long. If the only difference is in length of about 9/32" (.281"), why would there be two different reamers made and if the same reamer can be used on both Master & M-D, why wouldn't it state so on the laber on the reamer box ???? :confused: Maybe Chev Nut can provide an answer to this one. -Bob
-BowTie Bob
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Shade Tree Mechanic
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Bob- I just checked my 1938 shop manual, and found this information: "On the Master Model (conventional axle), the King Pin Bushings are bronze bushings of the "floating" type. When replacing these bushings it is not necessary to ream them to size, as service bushings are machined to finished dimensions."
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Tech Advisor ChatMaster - 25,000
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The Mangy Old Mutt
"If It's Not Junk.....It's Not Treasure!"
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The 0.736 reamer is also used for the '27 & '28 Capital and National models. They use the P/N 352213 king pin which was later replaced by P/N 363305 in the Feb. 1931 parts book and then P/N 602491 in 1939 and P/N 602691 for the set with bushings, bearings, shims, etc.
How Sweet the roar of a Chevy four!
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Shade Tree Mechanic
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Maybe the reamers for the floating bushings should include a tube of Loctite.
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Junkyard Dog: You stated above, that the .736" reamer is used for the '37-'40 Master (straight axle), but I have two sets of NORS king pins, one manufacturer's label states the one set as being for the Master and the other for the Master-Deluxe 1937 Chevrolets. Both mic up at .867" -.8675" diameter, with the difference being in length: the M-D pins are 5-19/32" (5.594") long and the Master pins are 5-5/16" (5.313") long. If the Master king pins are .867", how can the reamer be .736" ?? -Bob
-BowTie Bob
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Both the 1937 Master and Master DeLuxe used floating king pin bushings-so why would a reamer be necessary?Also Chevrolet did not supply over sized bushings or king pins for these models.
Gene Schneider
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Hey There Bowtie Bob! Don't know what to tell ya! Yep, I surmised as much when I was checking out the reamer and it's applications. However, the reamer is new old stock and I posted exactly the Chevrolet applications (also fits Pontiac too) that the manufacturer listed on the box. I decided to post what the manufacturer claimed and then let you dudes figure out this mess. :eek: :eek: :confused: :confused: :confused: :confused: :confused:
At least now you know that your 0.736 reamer definitely fits 1927 thru 1933!
The Mangy Old Mutt
"If It's Not Junk.....It's Not Treasure!"
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Shade Tree Mechanic
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Both the 1937 Master and Master DeLuxe used floating king pin bushings-so why would a reamer be necessary?Also Chevrolet did not supply over sized bushings or king pins for these models. The manufacturer only listed all of the vehicles using king pins with a diameter that matched their reamer. They didn't make any claims about how to correctly use the tool. I guess that was up to the mechanic. I use mine to clean up NOS bushings that I have in my stock, and to drive stuck bushings from the knuckle.
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The early bird gets the worm... but first he has to recognize the worm when he sees it.
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