which engine 300 or 240 (not original)
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Mountain Pass
Joined: Apr 2005
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From: Twin Cities
which engine 300 or 240 (not original)
I'm sure this has been covered, but I couldn't find it doing a search.
My 66 F100, according to the door panel, came with a 240. However, I know that the previous owner (my wife's grandfather) had a different engine put in the truck about 12 years ago. Is there a stamping on the engine that would tell me what engine it is (it's either a 240 or a 300), and more so, what year the engine was manufactured?
In taking out the radiator today for replacement, I noticed a brass tag on the front of the engine, near the fan. Would that provide a clue?
My 66 F100, according to the door panel, came with a 240. However, I know that the previous owner (my wife's grandfather) had a different engine put in the truck about 12 years ago. Is there a stamping on the engine that would tell me what engine it is (it's either a 240 or a 300), and more so, what year the engine was manufactured?
In taking out the radiator today for replacement, I noticed a brass tag on the front of the engine, near the fan. Would that provide a clue?
Elder User
Joined: Oct 2004
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From: Ridgeway, Virginia
There should be a # on the side of the block, basically between the starter and the exaust manifold. The # should begin with something like C6TE or D5TE. All you can tell by that is the decade the block was cast in, as well as the year.
I believe the only way to tell the two engines apart is to measure the stroke.
I believe the only way to tell the two engines apart is to measure the stroke.
Lead Driver
Joined: Aug 2003
Posts: 6,305
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From: Boulder Creek, Ca
Suppose to be, but rarely is, an 'engine identification tag' located under coil attaching bolt, or sometimes distributer attaching bolt. Had simular issue with engine in my 65. Came across article explaining the displacement is gained in the stroke. The 240 measures 3.180, and the 300 measures 3.980. Possibly I.D. thru 'engine assembly No.' and don't have a clue where it is located on the 240/300. Should look like C6TZ 6007 (and a letter). Perhaps more knowledgeable member can explain.
dave
dave
Last edited by daveengelson; Jun 13, 2005 at 02:29 AM.
Postmaster
Joined: Dec 1999
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From: Connecticut
Clean the tag off and see. It's most likely a rebuilt unit and that tag may tell you engine size and what size the bearings for the crank are.A Ford casting number will only tell you era as above post says. It won't pin it down to exact year. Ford just didn't do that. Most rebuilder used what ever block that would work, regardless of actual year. That 240-300 series blocks had a long span (65-89) and yours could be somewhere in that time frame.
Barry
Barry
Elder User
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From: Ridgeway, Virginia
Originally Posted by barry
A Ford casting number will only tell you era as above post says. It won't pin it down to exact year. Ford just didn't do that.Barry
If all this is true a 1960's 240 should have a block number beginning with C5TE------,or maybe another year like C8TE.
Still in all this will not help tell the difference between the 240 and 300.
Postmaster
Joined: Dec 1999
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From: Connecticut
No, it will not break it down to exact year. You are right about how you broke it down, by the last 300 6cyl engine were used up until the late 80's. They didn't change the casting numbers each year. Only when some modifacation was made to that block. D5TE casting were changed at that point because of unleaded fuel coming into existence. Same for the head that year. Look at the 223 engine, they stopped in 64 and all from 63 on had C3AE casting numbers. I'll repeat it, You cannot tell the exact year from a casting number.
Barry
Barry
Junior User
Joined: Apr 2005
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From: Edmond, OK
Simpler to say they made a lot of them at a time.
Supply and demand, used them up and made more or decided to make a new motor.
Last edited by HOWiseJR; Jun 14, 2005 at 08:14 PM. Reason: misspelled word
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Elder User
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From: Ridgeway, Virginia
Originally Posted by barry
D5TE casting were changed at that point because of unleaded fuel coming into existence. Barry
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Post Fiend
Joined: Nov 2000
Posts: 6,060
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From: Glendale Arizona
Just a side note..
The 300 was avalible in all ford trucks as the base engine untill the introduction of the triton in mid year 95 with the introduction of the 96 new drop nose F150s.
I have a junk F4 block sitting in the corner awaiting the scrap man
Garbz
The 300 was avalible in all ford trucks as the base engine untill the introduction of the triton in mid year 95 with the introduction of the 96 new drop nose F150s.
I have a junk F4 block sitting in the corner awaiting the scrap man
Garbz
Postmaster
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From: Connecticut
There were 2 mold changes on the 300 6cyl. In 75 they made changes and also in 87. In 87 they eliminated the opening for the mechanical fuel pump. This was the year they started fuel injection on them. So, basically, what they did was make a mold with the casting numbers on it and made a ton of these engines, all using that mold. Then when they made thier updates, the new molds reflected the changes with a new casting number.
Barry
Barry
Post Fiend
Joined: Nov 2000
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From: Glendale Arizona
Exactly.
Sometimes Barry there is a cast date, but not allways.
When leaving off the boss for the fuel pump the cam also had no eccentric provision to operate the pump.
Issues come up when using the 87 up block in a carb application.
Garbz
Sometimes Barry there is a cast date, but not allways.
When leaving off the boss for the fuel pump the cam also had no eccentric provision to operate the pump.
Issues come up when using the 87 up block in a carb application.
Garbz
Postmaster
Joined: Dec 2003
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From: Clarksville,Tn
Don't think this helps but the only exterior differences in my 66 240 and my 74 300 that I can tell was the implacement of the oil pan drain plug; both have all originial parts and I'm sure thats not a true 'identity difference" for the two engines of mine.
Boy did Henry & clan us the K.I.S.S method...
Mitch
Boy did Henry & clan us the K.I.S.S method...
Mitch
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