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philip 
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 Topic: chrysler oil pump shaftPosted: June-15-2020 at 12:09pm |
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does anyone have a part number for the oil pump drive shaft on
a chrysler 273 reverse rotation engine |
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philip thompson
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8122pbrainard
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Posted: June-15-2020 at 12:48pm |
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Philip,
Do you have the RR gear you can swap to a new shaft? |
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philip
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Posted: June-15-2020 at 1:16pm |
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yes i do and the gear is in good shape. philip
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philip thompson
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philip
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Posted: June-15-2020 at 1:24pm |
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the one i have looks different than what i find online didnt know if the shafts were different
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philip thompson
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philip
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Posted: June-16-2020 at 9:56pm |
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I am thinking about grinding the shaft down and making a custom bushing. So
No one knows where to get this part? |
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philip thompson
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KENO
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Posted: June-16-2020 at 10:20pm |
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How about a picture of what you're talking about?
Even if it's in a link to what you think is different, post a picture of something  If you're referring to the shaft without a gear on it, it should be the same as an automotive normal rotation shaft since the relationship between the camshaft, the oil pump drive gear and it's shaft and the oil pump is the same |
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phatsat67
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Posted: June-16-2020 at 11:45pm |
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Mopars do not have the gears on the dizzy shafts. The gear and oil pump shaft are one part and the bottom of the dizzy has a flat insert that goes into the gear. I’ve never messed with a RR Mopar in that regard but I do know they have a collar installed to keep the gear/shaft from pushing up on the dizzy which also means the marine dizzy all have longer shafts. Joe will know more about the RR gears.
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KENO
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Posted: June-17-2020 at 12:56am |
That's why a picture would be good, to help know what he's looking for. There might even be an old thread about this collar and corresponding distributor shaft length. Click on the link below link But the oil pump shaft that the gear attaches to is the same length except the gear is cut for RR Edit..............this sentence of mine isn't right , keep reading the thread |
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67 ski nat
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Posted: June-17-2020 at 1:17am |
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Be careful with that /// gear. There hard to find.
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philip
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Posted: June-17-2020 at 9:38am |
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i will get a picture and some measurements up today. philip
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philip thompson
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philip
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Posted: June-17-2020 at 10:42am |
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here is the shaft measuring the over all length and subtracting the recess in the end
the shaft itself is 9.0 inches long the whole thing is 9.220 the worn spot is .006 under i an thinking about grinding the shaft od until it cleans up and custom making a new bronze bushing. philip  
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philip thompson
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philip
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Posted: June-17-2020 at 11:09am |
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the melling shaft for a car engine part number is is-72 and it is 8.680 long.
no good. philip |
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philip thompson
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KENO
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Posted: June-17-2020 at 12:52pm |
In this case I figure a picture is worth a thousand words and roughly a half inch. Your gear has the raised section on top that a normal rotation melling IS72 automotive one doesn't have. Probably about a half inch so the shaft needs to be correspondingly longer. Chrysler had 2 different length distributors and used a thrust spacer on the RR engines and I think the length differences are all related to that You could call the place in the link who claim to have a complete inventory of 318 parts, a lot of which are the same as your 273 and maybe they can help out, otherwise your machining plan sounds good. link |
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philip
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Posted: June-17-2020 at 1:07pm |
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thanks for the link this thing has an electronic mallory dizzy in it
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philip thompson
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philip
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Posted: June-17-2020 at 2:45pm |
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he had one. it aint cheap but i got it. philip
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philip thompson
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KENO
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Posted: June-18-2020 at 8:23am |
I guess you got lucky, got a new shaft and found a place with a good parts supply for an old Chrysler marine engine How about a picture of the distributor showing a measurement of the shaft length and a picture of the thrust collar too so it'll help the next guy that comes along with this type issue. |
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philip
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Posted: June-18-2020 at 10:23am |
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it is a used shaft but the guy said it was not worn. i will get some details up
later |
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philip thompson
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67 ski nat
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Posted: June-18-2020 at 2:45pm |
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Nice job keno. I was not sure where to send him, forgot about Harry’s
Phillip, Harry can also Rebiuld your oem distributor |
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philip
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Posted: June-18-2020 at 2:54pm |
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its got an electronic mallory on it. philip
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philip thompson
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67 ski nat
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Posted: June-19-2020 at 11:05am |
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Yes. But good to have your oem in good condition for backup
If you have it |
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8122pbrainard
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Posted: June-19-2020 at 12:14pm |
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Phillip,
Your a machinist so you should have just grabbed a piece of 4140 and made one. |
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philip
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Posted: June-19-2020 at 6:07pm |
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what i should have done is ground the shaft down and made a custom bushing.
but at least i have a spare. i do not have the oe distributor. thanks to all for the help it was not too bad 85.00 for the shaft with gear. philip |
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philip thompson
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8122pbrainard
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Posted: June-19-2020 at 6:23pm |
With the gear, I'd say that's a fair price. 
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phatsat67 wrote: