Oil Pump Question:

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Jul 23, 2023 | 07:23 AM

leonharu

Thread Starter

Laughing Gas

Joined: Nov 2001

Posts: 969

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From: Cherryville,N.C.

Oil Pump Question:

I am getting flathead engine rebuilt in my 1952 F-1.It is a stock 8RT.What is the best oil pump to use?I wanted to use a high volume but I am understanding that you have to modify the oil pan and the pick up tube,is this correct in assuming?What oil pump assemblies has anyone used? Thanks,Russ

Jul 23, 2023 | 09:43 AM

ALBUQ F-1

Fleet Owner

Joined: Jul 2004

Posts: 27,299

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From: NM

There is no need or benefit to using a high pressure or high volume pump on a stock engine. They are for race engines with sloppy bearing clearances, or worn out engines. 8BA/8RT pumps already are a step up from the 59-series pumps to allow for the bypass oil filters' flows.

I have used the Melling (standard) pumps, no problems. They have become pretty pricey, and apparently production has been moved offshore. Were pressures OK before the rebuild?

Jul 23, 2023 | 09:50 AM

leonharu

Thread Starter

Laughing Gas

Joined: Nov 2001

Posts: 969

Likes: 71

From: Cherryville,N.C.

Thanks,Ross.Pressure was about 30 lbs while driving and it would drop close to 0 at idle.I thought maybe Melling would be a good quality pump to use.

Jul 23, 2023 | 11:53 AM

mOROTBREATH

Cargo Master

Joined: May 2008

Posts: 2,491

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From: Bakersfield, CA

I have had some trouble cross referencing and digging up alternate part numbers, but if you have the patience, you could try finding NOS units on eBay. Both NOS Ford and NOS aftermaket.

Water pumps for my 223ci used to be $25-30 every-day-any-day at the parts store only 3-4 years ago.
Today nobody carries them and they are $80-100. I found an unknown part number on an old water pump in my back yard. I plugged it in to eBay and found one NOS for sale for $31.

Ya never know...

Jul 23, 2023 | 12:42 PM

bmoran4

Parts Nerd Extraordinaire

Joined: Sep 2010

Posts: 4,381

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From: Western NY

Stock oil pump assembly for 239 Trucks is 8RT-6600-B1 or 8RT-6600-B2 which had internally spur or helical gears respectively. Both are based on the 8BA-6612 pump assembly with the 8RT-6615-B tube assembly for the large truck oil pan 8RT-6675-B (larger capacity pan with clean out).

After ~70 years, motors and oil pans have been swapped around and so the first thing would be identifying what oil pan you have, wether it be passenger, truck, Ford, Mercury.

Short of that, I believe the standard 8BA-6612 pump assembly is pretty universal application and you should be able to reuse your existing tube assembly and screen with whatever oil pan you currently have installed.

Jul 23, 2023 | 12:48 PM

ALBUQ F-1

Fleet Owner

Joined: Jul 2004

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From: NM

Wow, I just checked prices on the Melling Standard; over $200! Last one I bought was $150 and I thought that was outrageous.
At those prices I'd consider inspecting the old pump, for possible re-use. If the engine was in decent shape before the rebuild, not full of sludge or water, and internally it isn't scored or sloppy, it might be worth using. Easy enough to change if it doesn't provide the pressure desired.

Jul 23, 2023 | 04:20 PM

mOROTBREATH

Cargo Master

Joined: May 2008

Posts: 2,491

Likes: 337

From: Bakersfield, CA

Quote:

Originally Posted by ALBUQ F-1

Yep, the melling pump in my 223 right now was the same that was in it before the rebuild, I cleaned it and used feeler gauges to measure clearance between the rotors or whatever. My machinist concurred it was more than likely fine, we slapped it in and I've had no issues.