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By HazardTBird - 2 Years Ago
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Was the Gerotor Oil Pump used on all 57 Y-Blocks, even the early, built in 56, models?
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By 55blacktie - 2 Years Ago
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According to Ted Eaton, the aluminum gearotor oil pump was used beginning with the introduction of the 312 in 56 and continued until the end of Y-block production in 1964. eatonbalancing.com/2022/01/15/ford-y-block-oil-pumps/
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By Ted - 2 Years Ago
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Thanks, Jeff, for chiming in. As far as I know, the georotor oil pumps were available on all the 1957 V8’s including those introduced in September of 1956. The only part I find that was carried over for a short period of time for the ’57 models was the cartridge oil filter. Do not have a date for the official changeover for oil filters but the use of cartridge or canister filters was a short-lived carryover before the switch was made to the disposable spin on oil filters.
It’s not unusual to find spur gear pumps now on the later model Y-Blocks as the aftermarket has continued to make the spur gear oil pumps in lieu of the newer design gerotor pumps. As a result, I have found a large number of replacement spur gear oil pumps on those engines that have been completely rebuilt since leaving the factory.
While FoMoCo went all out on the changeover to the gerotor style of pump, many of the aftermarket parts manufacturers did not make that change. As an exception, there were a limited number of oil pump manufacturers that did make a replacement gerotor pump for the Ford Y but most of those are now gone. It’s interesting to note that the few aftermarket manufacturers that made the georotor pump for the Y made them from cast iron rather than aluminum.
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By 55blacktie - 2 Years Ago
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I do find gerotor pumps on ebay from time to time, and rebuild kits are still available.
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By HazardTBird - 2 Years Ago
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Thanks Blacktie & Ted:
Ted, probably from your writings, gerotor really save a horsepower or two over the geared pump at higher rpms?
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By 55blacktie - 2 Years Ago
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Less likely to cavitate and higher rpm.
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By HazardTBird - 2 Years Ago
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Thanks Blacktie, interesting!
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By 55blacktie - 2 Years Ago
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Sorry, I should have said less likely to cavitate AT high rpm.
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By Ted - 2 Years Ago
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HazardTBird (10/16/2023)
Ted, probably from your writings, gerotor really save a horsepower or two over the geared pump at higher rpms?
Assuming both the spur gear and gerotor oil pumps are providing the same oil pressure, then expect no horsepower differences. The gerotor pumps by design are less cavitation prone and thus more suited for higher rpm engines. Because the gerotor oil pumps deliver the same amount of oil per revolution but in essence are six times more efficient in the way the oil is being passed within the pump, less heat is transferred to the oil itself before moving on. If the engine is a daily commuter that never sees over 3500 rpm for any extended period of time, then the spur gear pumps are more than adequate. If running the engine at 4500 rpm or more for an extended period of time, the gerotor pumps are superior to the spur gear pumps.
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By Tealy64 - 2 Years Ago
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are these the same oil-pumps that are on the '64 292's? We need an oil pump tube seal and nut and I've found a couple on the 'Bay.
Parts numbers are EAD-6673-A and B4A-6698-A. These should work for for our motor, right?
Does anyone happen to have a set of these laying around? ;-)
Thanks!
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By Ted - 2 Years Ago
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The gerotor oil pump is what came from the factory on the 1957-1964 Y engines. If the engine has been rebuilt sometime since then, the oil pump could have easily been replaced with a spur gear pump. But the oil pump gland nut and rubber seal are the same for both styles of pumps.
If you have trouble finding those parts, I have the gland nuts and seals as extras. If you’ll send me your mailing address, I’ll drop one of each in the mail for you. My email address can be found at my website under the ‘Contact Us’ tab at www.eatonbalancing.com .
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By Tealy64 - 2 Years Ago
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Hey Ted!
Thanks so much for the reply. I called my local parts store (O'Riley's) and they had no access to either of those parts. Their suggestion was a junkyard. Which of course, there are none around me.
I'll shoot you an email from your website.
Thanks again!
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