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which series 10 engine

F

Fordfarmer

Well-known Member
Moved some stuff around in the shed today, including that "some day" project engine. With it where I could see, I found these numbers...oil pan rail: (star) L725220 (star) and on the mounting ear: AAC
6OAO
3H17A
The last four digits on the mounting ear look like a unit number - 1983, Aug. 17, 1st shift. There is also a 4.4" cast (not stamped) in the block just below the head on the right side. It's a naturally aspirated engine, and assuming the 4.4" refers to the stroke, it's from a 6610, correct? This one has the cross hatching on the side of the block, while my cousin's '83 7710 does not. I'll have to check his buold date again.
 
Pre genesis? seems xing was on early 90s engines. Have some info got at last service school went to in Dallas in 93. Have do some hunting for.
 
I figured it would refer to the stroke because the 233
had been dropped (again) in '81 when the Blue
Power Specials came out. Since there was no 4.2"
bore 4-cylinder at that time, why bother noting it was
a 4.4" bore?
 
Nothing about it suggests that it's a Genesis, but I'm not that familiar with them. I should look for more casting numbers... a D would be '70's and an E would be '80's, right?
 

My cousin has a 92 7740 with a 304 Genesis but I haven't really looked to see what is different about them.
I do remember they have a bolt on oil filter adapter where the older engines have the spin on filter pad made in the block.
My 6610 is a 90 model and has the X ing on the block.

Pull a injector and roll in over while measuring piston travel, 4.2" = 256, 4.4" = 268 and 5" = 304.
 
Stroke is determined by the crank and pistons. Bore is specific to the block. An example is the IH 400 series. The same block can be built as a 414, 436 or 466.
 
(star) L725220 (star) on the oil pan rail is the engine serial number. If they kept to the same lettering at the beginning of the engine serial number as they did on the 1968+ thousand series, the "L" should mean that it's from a 5600 or 5610 depending on the year. which would most likely make it a 4.4" bore x 4.2" stroke 256 ci engine.
 
That's the information I was hoping to hear... but I
couldn't remember if it was the letter in the engine
serial number or on the mounting ear that you
looked at. Couldn't remember which letter meant
what, either.
The casting number looks like E1NN 6015 JA. E1
should be 1981, right?
So, chances are, it's a 256. Was kinda hoping for a
268, but there's nothing wrong with a 256. Especially
when you only pay scrap price to get it. It's still on
the back burner. Luke's 4000, the 4000SU, and the
SOS/8-speed swap in my friend's 5000 will all come
before it.
 
For one, the water pump/fan orientation is offset as compared to the original Basildon design.
 
What are the casting numbers? That would help date it...
If it's a 4 cylinder marked as 4.4" bore... it could be either a 256 or 268. The 256 of that vintage nominally had a rotary injection pump. The 268 had the inline simms/minimec pump.
If I had to guess I'd say you have a 256 based on the numbers but I'd really have to look in a manual to know for sure..

Rod
 
E1NN6015JA is the casting number, as near as I can tell - that side of the engine is against the wall and in the shadows now.
The injection pump is gone, but the lines are there... and they are clearly for a rotary pump... so more and more, it's looking like a 256.
 
E1nn would be an early 80's number so likely it's an 83 or whatever the unit code indicated. That would be a 5610 engine.

Rod
 
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