Help identifying my Buick 231... At least I think it is. Thanks!

Ok, looking at this on the desktop it does look like a 225. Check the casting numbers to be sure though. The external things like points distributor, pcv valve in valve cover instead of intake, etc. are certainly all good clues but I've seen too many pieced together Buick V-6's to go just by those. Several years ago we had a Jeep come in that was an even fire block, odd fire crank, 225 intake with 231 heads, etc. etc. We finally had to pull the pan and look up all the casting #'s to figure out what we had....

 

okay fellas, here is the only casting # I've found so far 1378704 E. Which going off the link sparky gave me would indicate this:
[h=4]225 Intake casting numbers:[/h]

• 1 barrel : 1381552
• 2 barrel : 1378704

Now, I need to find some more numbers.... I have tried looking all over this thing and am having trouble finding the other markings as I am a noob at this.

Oh, and I am thinking this is a 225 because I looked at the valve covers this morning and they are horizontal, not angled as nickmil clarified the difference in a 231 and 225 covers. I'm gonna try snapping a few more shots and different angles of the engine so you guys can see what all I have got. Thanks again guys.
Oh and is it ok to hit the engine with a pressure washer? I don't want to screw anything up(or I should say screw anything up any further)

 

Thanks Warloch, I'm hoping this isn't a "Franken" motor, but the suspense of figuring this thing out is almost keeping me awake at night

 

here are a few more pics of the engine. Did the best I could getting different shots of it.

 

its a v6...now take it out and wheel the crap out of it

 

Awesome Warloch. Just climbed up in the jeep and started scrubbing all the dirt/grease/goop off and here is what I found. Here are a couple pics of what I found.





Do you see what I see 991503! So going off the info sparky linked it looks like this is an odd fire 225 made between 67-74.

I also see the H and there is a number "4" by itself - also looks like "09s 6" or "095 6" or maybe that 6 is and 8 at the end?

Also do you guys see an s? If so, it is a 1970 engine. Could this possibly be the original engine or am I just getting my hopes up? Help me out guys. I know you know more than me!
Thanks

 

The greenish paint looks to be the original color the Early CJ Dauntless's came with. Car versions were typically blue like your valve covers or black from what I've seen.

 

Backing up a step, notice no EGR valve as is found on the 231 OF intake. Though the intake may had been changed. But, now the numbers verify things so, it's sort of a moot point.

 

Thanks for all the help guys! I'm excited that it is the 225 over the 231. Now if I can only figure out if this is the original engine or not. I see the Kaiser manufacturing plate on the firewall. It has the serial numbers I think on it. Is there a way to match those numbers to the numbers on the engine?
Thanks

The 991503 tells me this about the engine: [TABLE]
[TR]
[TD="align: left"]1967-74
[/TD]
[TD="align: right"]225[/TD]
[TD="align: right"]3.7[/TD]
[TD="align: right"]3.75[/TD]
[TD="align: right"]3.40[/TD]
[TD="align: left"]V6, Odd-Fire, Kaiser Jeep Corp/AMC[/TD]
[/TR]
[/TABLE]

Now can anyone help me figure out the year and month it was built?

 

I would look on that flat spot in the red circle below. Clean it up and you should find the numbers and decode the date of manufacture with Warloch's info above.

 

wow!!! theres paint under the grease an dirt???

I'm gonna have to try that

 

Thanks Warloch, ojgrsoi, and sparky for all the info and help. Here's a cup of Joe for you this morning

ojgrsoi, I swear I have looked there, but I will check it out this morning in the area you circled. Thanks for helping me narrow down the location!

Lol chuck, yeah believe it or not there is a little paint under all that baked on grease and dirt.

 

Thanks again everyone for the help. Thanks Mark(ojgrsoi) for circling the area above so I would know to look harder in that area. I looked at that spot a couple times and couldn't see anything, but you helped me out a bunch. I started cleaning off all the junk covering the markings and at the same time I was wishing my beastly large hands were 2 times smaller to get in there and scrub all the grime away. Anyhow, this is what I came up with and a photo. Even after cleaning it up it was very difficult to make out all the letters and numbers. In fact, the D and R aren't even raised so they almost just blend in. So this is the best I could come up with Looks to me to be DRH 043. Going off the info sparky and warloch gave me this suggests it is domestic, 1969, 225 9.0 to 1 C.R. (2bbl carb)

SO, this will probably be my last question regarding the engine info. Is it possible that this engine is original to the 1970 CJ5? Or should the engine built date be "S" for 1970? Is there anyway to know sure sure if this is the original engine or not?
Thanks guys, and here's the pic of what I found

 

I don't know if you can determine originality or not. If you know your build date based on your VIN you could compare them. They wouldn't match but at least you could assume it is or isn't.

043 looks like Feb 12, 1969.

Glad you found your numbers. Now while you are on that side look on top of the frame to see if the frame stamped vin matches your body vin. That takes some cleaning and a wire brush. On top of the frame under the battery tray.

More fun...

 

Awesome, thanks Mark! Glad you could make since of the 043:tea:. That is great news. I really hope this is the original engine. The PO of the jeep really didn't know any history on it other than when he got it in 2006 (from what the title says) it had been sitting in a barn on a farm. He got it running, but lost interest in fixing it up and it sat in his garage for 3+ years. Anyway, the whole reason I thought the engine was swapped is because the PO told me it had a 231 in it. Knowing it didn't come from the factory with a 231 I assumed the engine was not original. Now that I have come to find out that it is a 69 225, I am starting to hope that it is the original engine and the PO just was mistaken on what engine was in it.

OH, and just took your advise and the vin on the frame matches my body vin.

So can I look up my vin someplace? the vin number is 8305017358262. The frame vin was 358262
Thanks again!

 

http://www.earlycj5.net/forums/show...is-thread-for-Serial-Number-or-VIN-questions-!!

Read it all before you decide your guestimate date of manufacture. try post #155 and #219.