69 Ford 4000 Engine Identification

growthguy

New User
This message is a reply to an archived post by Sean in PA on September 09, 2018 at 12:16:40.
The original subject was "Re: 69 Ford 4000 Engine Identification".

Sean:
I have a 1974 Ford 4000, sn is C429995 on a sticker on the inside of the hood. I'm almost positive the engine has been changed, so I won't give the mfg codes. The engine marking is DONN 6015L and a serial number of *D632115*. By your post, the D6 would indicate a 1976 engine. However, it has 1/2-13 head bolts, whereas from what I've gleaned online, the 1/2-13 head bolts were used from 1965-68 and the 1969-?? engines used 9/16" head bolts. Where is the mistake in my thinking? I need to order a head gasket and want to get the correct one. I see two different versions on the web. Did this engine come out of a 4600? Please help. Thank you. Jim
 
(quoted from post at 06:42:43 02/25/19) You're off by a couple of decades on the head bolt thing. The 9/16" head bolts came out in the late 1980s. See reference #7 below.
Head bolts

Thank you for the reply, Bern. I'm confused. Many aftermarket suppliers list the 9/16" bolts being used 1969 to 1974 for the 201 diesel in the 4000. They also list the 9/16" bolts for the 4600 for 1975-1981. They differentiate between the head gasket for the 1965-1968 using the 1/2" bolts and the 1969-1974 using the 9/16" bolts. Which head gasket should I order? What am I missing? Thank you again. Jim
 
Bern:
After studying your diagram note 7, I realize that the use of 1/2" bolts was evidently continued beyond 1968. I had been assuming that their use was discontinued after 1968. This helps me. Thank you.
 

Lots of miss information from the aftermarket suppliers on these tractors.
The main difference between the 65-early 68 head gasket and the late 68-up is the thickness of the gasket.
Your tractor uses the later .056 thick head gasket # E0NN6051-AC superseded to # E7NN6051-EA superseded to #83956449
 
This message is a reply to an archived post by Sean in PA on September 09, 2018 at 12:16:40.
The original subject was "Re: 69 Ford 4000 Engine Identification".
...
The engine marking is DONN 6015L and a serial number of *D632115*. By your post, the D6 would indicate a 1976 engine.

Is *D632115* the engine serial number? If so, the D at the beginning means that it was built for a 4xxx series tractor on or after 4/1/1968, and that is all. The 6 has nothing to do with a year, it is just the first digit of the 6 digit sequential serial number. I just looked back at my post that you referenced, and I never mentioned anything about the first digit after the D having any significance. I have put that post below as a reference. Note that the only mention of dates was the switchover date from the letter at the beginning changing from an "L" to a "D":

All 3 cylinder diesel 4000 engines were 201 ci (4.4x4.4 bore x stroke). The gassers were 192 ci (4.4x4.2) from 1/1/65-3/31/68, and were 201ci from 4/1/68 onwards.

The 175ci diesels were only used on the 3000 series and the the later 3600 and 2610 series.

To be sure, in case the engine was ever replaced, look down below the raised C7NN6015 number, below that number and just above the oil pan there is a flat rail. There is a taller section on that flat rail that is taller than the flat sections fore and aft of it. The engine serial number should be stamped into that taller section of the rail. It is a stamped number not a raised one and the characters will be much smaller than on the C7NN casting number. If the engine serial number starts with L (prior to 4/1/68) or a D (4/1/68 & onward) then it is a 4000 series engine and it is a 201 ci engine if it is a diesel.
 

What makes you think the engines been changed?
In the photo below the engine build date is stamped on the flat below the oil cooler line bracket.
Your tractor probably doesn't have those oil lines but the numbers should be stamped in that location.
Compare the build date there with the engines build date on the foil data tag under the hood.
Also compare the data tag numbers to the ones stamped on the trans case behind the starter.

mvphoto31980.jpg
 
Thank you for the info. I would surely compare the date on the engine to the date on the hood, but I cannot find any metal-stamped codes on the engine itself, not in the places you suggested or anywhere else. The only marking on the engine is the serial number that I mentioned earlier. Again, thank you.
 
To Destroked 450:
Yes, I notice a difference in thickness. Another difference is that the gasket for the 1/2" head bolts has .605" diameter holes in the gasket for the head bolts. The version that uses the 9/16" head bolts has .747" diameter holes. I'm concerned about how well the gasket with the bigger holes will seal around the head bolts. Any help will be appreciated. Jim
 

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