Hi Guys: I need some help. The 225 Cu In 6, Is it the same block as the 254 Cu In that Ford put in their F-6 trucks in 1951. Thanks Big D.

 

Yes the 226, & 254, are the same engine in all aspects, except the bore and Intake valves size, the 254 is larger (of course).
226 Bore 3.30
254 Bore 3.50

Hope this helps
Rod

 

Thanks, that is all I needed to know. Big D.

 

If you happen to come across two keep me in mind, I would like to have a 254

 

When did they use this engine? I had a '49 F-6 with a flat six and I just assumed it is the 226. Did they come stock in the F-5 and 6 or did you have to special order them? Other than tearing the engine apart how can you tell which engine you have?

 

The 254 was used in the F6 from 48 till 53 it has 8M stamped on the head and the numbers on the pan rail below the distributor also start with 8M. The 226 has 7HA or OHA on the head and the numbers start with 7HA on the pan rail.
As I recall the F6 could have either the 226 or the 254 in it, but all the others F1,F2,F3,F4,F5 all had the 226 only. One cool thing about the 254 is it has 6.8 to 1 compression, you can drop a 226 head on it and the compression will jump to 7.6 to 1.

Hope this helps
Rod

 

I just checked the side of the engine. The number on the side below the distributor and above the oil pan start with a 1HA, do you know what this means?. I took this engine out of a F-6 with a crushed roof. I was loose and had a somewhat recent rebuild tag so I kept it for a replacement for the engine in my F-2. The F-2's engine smoke some when I take off from a stop and it seems to lose oil.

 

Probably just a number for model year 1951. I believe the H model six was introduced in mid-1947 for the cars, then adapted for the pickups/trucks in 48.

 

I haven't heard of a 1HA could that 1 be a 7 because the 226 block had 7HA at the pan rail and 7HA or OHA desigination cast on the head.

 

I have the engine tucked under a shelf on an wooden stand and the block has a nice coating of crud on it so I could read it too easily. The "1" could be a "7". I never had the engine running, I just yanked it out of the truck before I tore it apart. I figure I could use it in my F-2 when the one in it now finally gives out or starts smoking too bad.

I like the flat six, it's a good strong engine and can take a beating unlike what I have heard about the eights with their overheating problems. Beleive me, I have put this six through a lot in the last 20+ years. The eights are "sexier" but I figure you can get just about the same performance out of the stock six as you can the stock eight and the sixes are a heck of a lot cheaper. I have gotten a few of them for free. I have flat eights in my two other trucks but haven't had them on the road yet to compare them to the six.

 

bobj49f2
Yea I just looked at my 226 again and the horzoinal part of the 7 kinda blends in with the pan pail and a casting mark right in front of it. My 6 was rebuilt in the mid 70's and sat for 12 years prior to my purchase. It still turned over but some of the valves were stuck open, I kept pouring Marvel Mistery Oil in it and finally got it freed up. I have never even had the head off of it yet but it's running real good now and bearly using any oil at all. The only problem I see with them is that some of the internal parts are getting real hard to find. Like the oil pump drive gear. The 7HA and 0HA each used a different gear with a different number of teeth, the camshafts are stamped on the end 0HA or 7HA. I realize those gears don't go bad very often but anyone running one of these engines I feel should have some spare parts on hand just in case. I'll tell ya though, that 5-speed S10 trans I just installed has really made that engine run and sound different. And the whole truck in general is a lot quiter, If I didn't know better I would think 226 had been designed to go behind that trans.
Anyhow, when you get arounf to comparing that 6 to the 8 let me know what you think. Did you see the magazine article done in 51 comparing the 226 to the 8BA in a passenger car. If not, drop me an e-mail I have it on my computer.

 

Bob, I just sent you an e-mail with my e-mail address