Engine numbers

Ford "Engineering" numbers consist of 3 parts, you correctly decoded the first part.

The second part of the number is Ford's basic number for the type of part. For instance 6250 is a camshaft, an engine block is 6015, a cylinder head is 6090 and an intake manifold is 9425. This part of the number is normally left off of certain types of castings, since if you are holding the part in your hand, you know by looking what type of part it is. On the other hand, intake manifolds always have the full number cast into them.

The third part of the number is the revision level, in your example OL2.

The complete number for the block would be D0AE-6015-OL2


Ford also casts a "casting date code" into each part as well, representing the exact day the part was cast.

0 = 1970
L = November
5 = 5th day of November

the months skip the letter "I", so they breakdown as:

A = Jan
B = Feb
C = Mar
D = April
E = May
F = June
G = July
H = Aug
J = Sept
K = Oct
L = Nov
M = Dec

I have no idea why there is a second letter, the G.

cowboy from hell

Thanks George. Since you mentioned Intakes

I have the following two numbers from mine

D1Zx-8425-DA
13726548

It has the ford logo on the intake. I am wondering if this is the stock intake or if it was swapped out at some point.
Thanks

Interesting question AJ, that is indeed a Ford intake manifold. It was not original equipment on the 1970/1971 351C 4V motor installed in your pushbutton car, a cast iron intake was. However, I have read from more than one source that this manifold was indeed installed on some, if not all, pushbutton Panteras. If this was so, it was installed either by Ford or DeTomaso specifically for the engines installed in the pushbutton Panteras. I'll leave it to those more knowledgable about the pushbutton Panteras to verify or deny this manifold was oem.

The part number is actually D1ZX-9425-DA. The other number, 13726548 is the Cleveland motor's firing order.

A little history about aluminum 351C manifolds:

The Cleveland motor was built in 3 distinct states of tune,(1) the small port, 2 barrel carburetor version known as the 351C 2V (2) the large port, 4 barrel carburetor, hydraulic cam version known as the 351C 4V (3) and the large port, 4 barrel carburetor, solid lifter cam version known as the Boss 351 or 351 HO. This last motor is often referred to by Ford enthusiasts as the R code motor, because on a Mustang door tag, the engine code for cars with this motor was "R".

Ford developed 2 aluminum intake manifolds for R code motors. The first was the D1ZX-9425-CA manifold. It was designed for cars sold in the US. It was a spread bore manifold designed for the Autolite 4300D carburetor. This is the manifold you'll find on a 1971 Boss Mustang, or a 1972 Mustang with the 351 HO motor. The other manifold was the one installed on your Pantera, D1ZX-9425-DA. It was designed for R code motors destined for Australia. It was a "square bore" manifold designed for a Holley 780 cfm carb. The "DA" manifold was sold in the US over the counter as part of Ford's OHO (off highway) parts program.

The R code motors were shipped to Australia with the "DA" manifold & 780 Holley, and installed in the Australian Ford 1971 Falcon XY GT-HO phase III, which is perhaps Australia's most famous muscle car.

cowboy from hell

quote:

Originally posted by AJThree:

The block also has 0L5G stamped into the front of the block just to the left of the water pump. Any idea what this number is?

My block has this also. It is a D2-CA block.

I don't know for sure BUT my Australian friends tell me that blocks manufactured in Australia are REQUIRED by Australian law to have a "serial number" stamped in this area.
Australian vehicles with 351c's have thier VIN number stamped there.
Wow, I wonder if your engine and my engine both came from the same car? Do you think?

I also know that the mint mark, so to speak, for the Australian casting is G.

YEA, YEA, EVERYBODY STOP YELLING AND QUITE DOWN NOW!

My Australian friends also claim that ALL 351c blocks with the ID D2..-CA were cast in Australia and are "high nickle" Australian blocks. HEY! I TOLD YOU GUYS TO QUITE DOWN AND STOP YELLING!

I didn't say NASCAR XE blocks now did I?
There was some talk about doing a Rockwell hardness test on the blocks but it hasn't quite develped yet.

I also seem to remember something about the "legal" blocks for the '72 Pro stock series vaugly. Very vaugly...and they weren't the XE blocks. Those weren't legal for PROSTOCK.

BARKEEP! 'nother round!

I went back & re-read AJ's first post. He wrote the number OL5G is STAMPED on the FRONT of the block. The date code I was referring to is CAST into the block on the side facing downward. So OL5G is not the date code. I apologize for misleading you AJ. I have no idea why OL5G is stamped on the block.

Doug, we've covered this ground before. All of the blocks produced in the US between 1972 and 1974 were casting number D2AE-CA blocks, both 2V & 4V, 2 bolt mains & 4 bolt mains. And yes, all the blocks produced in Australia, between 1972 and 1982 had the same casting number.

From reports I've received from folks who have purchased run of the mill Australian blocks (not the NASCAR block) I have come to believe that they indeed do have a better metalurgy, as the cylinders do not develop a taper or a ridge at the top, and it gives the machine shops fits if you ask them to bore one.

The mint marks are found on the little bit of block back where the oil pressure sender screws in, the US blocks have a "large-C small-F" symbol cast in that location for Cleveland Foundry, the Australian blocks have the letters GF cast in that location for Geelong Foundry.

cowboy from hell

The Australian's while not denying what you say state that the foundry mark is often not readable.
That is the case with my block as well.
I personally make no claims one way or the other. 'twas the Ausies brought it up.
I just thought it is interesting and perhaps is more then coincidental?

Okay Guys,

What about the valley XXXX-YYYY, isn't that supposed to indicate the metallurgy i.e. high Ni content block or is that just another one of those 'urban myths'. Does a high Ni block necessarily come from Australia or were they produced in the US too?

quote:

Originally posted by Joules5:
Okay Guys,

What about the valley XXXX-YYYY, isn't that supposed to indicate the metallurgy i.e. high Ni content block or is that just another one of those 'urban myths'. Does a high Ni block necessarily come from Australia or were they produced in the US too?

XY indicates Male. XX would indicate female.

The 2 casting marks, even if not readable, are so different they are easy to tell apart. The large-C with a small-F in the middle is round, the GF is two separate letters.

D2AE-CA blocks were cast in the US for 3 years, from 1972 through 1974. I have one in my garage right now, the CF is very readable. I have one in my Pantera too, the CF is readable on that one. The machine shops don't bitch when asked to bore a US made D2AE-CA block, I can only assume the metalurgy is different from that of the Australian block.

US 351C motors were exported to Australia from 1971 to 1974, not the other way around. Their foundry did not begin producing motors until 1972, and production was on the slow side at first. All 4V motors installed in Australian Fords were assembled in the US, with US blocks.

Julian the X's & Y's are NOT a sign of metallurgy, most definitely urban legend. If anything, it is a sign of age. The blocks made in 1970 have very few X's & Y's, the 1974 blocks seem to have a valley full of them. I've never read a reasonable explanation for them yet, probably never will.

All production US blocks had the same metalurgy, to my knowledge. There are those SK blocks floating around, anything goes where they are concerned.

There may be a good reason why the australian foundry used a tougher iron in their blocks, after all, the climates between the two continents is different. I doubt Ford spent the extra money for the more expensive iron for no reason at all.

cowboy from hell

Oh boy not this subject again ... but Doug one thing I can confirm and I collected this data from the Cobra Site ... the 3 guys who brought MKIV's to the US in 1985 -2001 say that all motors had to have serial numbers in them...so I assume any car coming to the US has to have serila #'s in other places other then just the body.

Ron

What? I'm being good.

Doug did you see the prices of the SHELBYs last night on BJ ???? I sold my 69 500 in 2000 for 26k .... kick myself .. had to liquidate before the divorce ...LOL

R

Yes I did.
In all fairness they are on the low side compared to BB Chevelles and Hemi-anythings.
The 67 GT500's have been noticiably hot since the "Gone in 60 seconds" movie.
I noticed the red one sell for $410,000.
Even if BJ doesn't necessarily have a direct effect on local reality, it at least has a trickle down effect.
BJ is also very selective. They won't take just any car. Also Phoenix is the place to go, not Miami.
What puzzles me is why the Panteras are so low. No one can reasonably explain this.
Even the Mangustas are on the low side.
It may well be that all of the "exotics" are a bargain. I've seen Lambo Countach's and Ferrari BB's going for $50,000.
The prices are tending to be "muscle car" fenomina.