L6 cylinder head data for a new report

[bcmiller]

I am working on a report for 67-69 Camaro cylinder head usage. I have the SBC and BBC numbers pretty much done, but I am struggling a bit with the L6 heads.

I assume that the 230 and 250 engines used the same head and probably the same casting number all 3 years, but can any of you verify?

Include
1. The head casting number
2. The casting date
3. Year of the engine.

Thanks in advance. If you photos are used, you will be giving credit.

[67conv6cyl]

1967 250 engine
04A build date on car trim tag
There are 3 casting numbers on head first one is “4888” second one is “4890” third one is “4883F12”
Engine bock assembly stamp is F0402LN

[Her68His69]

1968 Convertible, 250 engine. Car built on Nov 8, 1967.
I have 4888 first, in the middle its 890, near the front its 4888 F 18.
Block date is G257, So July 25, 67.

The block casting is 3921967. If you look on the CRG Engine Casting Number chart, for an L6 for 1968. it only shows 3921968. Could that be an
omission?

[bcmiller]

Thank you both!

It has been a LONG time since I have been around the L6 engines. Did you get these numbers from the outside of the head or from under the valve cover?

I did finally find a reference after doing some searching.
https://www.inliners.org/tech/heads/headindex.htm

Not sure if the full casting number might be under the valve cover?

[Her68His69]

All numbers from the outside of the block, passenger side.

[bcmiller]

I found some on ebay and the seller is allowing me to use them.  Numbers are under the valve cover.

[bcmiller]

Well the data on 6 cylinder heads for the report may just have to be left as incomplete for now and updated later.

3864886 is the only one verified so far.

[bcmiller]

Anybody want to contribute some head data on their L6 engine?

[David K]

I'll upload mine later today

[bcmiller]

Thank you David.

Is there anyone else you know with an original L6 that might have a different casting number?

[David K]

Not aware of any . The very few I have seen all end in 1968...I thought that was on purpose but doubt it. It would make sense when ypu make revisions.

[David K]

I love ya B, but I’m not taking a non leaking valve cover off today. I have 2 guys who will be sending pictures. 1 is currently on vacation.

[David K]

It’s a bit tricky getting the camera to focus past the compressor.  Hope these help.

[Her68His69]

Please look at my previous post. My block is 3921967.

[bcmiller]

I can take a look at the engine casting report. It might be an error in your casting number.

[Her68His69]

Thanks, That would be great.

[David K]

More here

[David K]

Another

[bcmiller]

So your head casting number ends in 7763 ?

Then the full number would be 3927763.

[David K]

B-that’s not my car…did you more/better pictures?

[bcmiller]

B-that’s not my car…did you more/better pictures?

The pics shown are fine. Who gets photo credit if I use any of the pics?

That shows the partial casting number externally and verifies another one used for Camaros.

[KurtS]

Paul,
3921967 looks like a valid block number. Not common from my limited experience.
What's the engine stamping (by the distributor)?
Could the 4888 head # actually be 4886?

[Her68His69]

Hi Kurt, thanks for looking. The number looks to be 4883.

[bcmiller]

Paul we need to verify the engine code.

http://www.camaros.org/images/pages/decoding/1967-69_L6engine_stamp_location.jpg

[Her68His69]

No problem. i will do it ASAP

[Her68His69]

Nothing there that I can see. I’ve heard that it’s not uncommon for six to have nothing there. Is that true? Thanks

[bcmiller]

That doesn’t seem to be the correct spot.

Look from the top, passenger side, between the area of the dipstick and the distributor.

[David K]

That's the right spot. It's possible the layers of paint make it impossible to see. That wirey thing to the right is the distrhold down clamp.

[Her68His69]

I can take the paint off in that one little area. What would be best to use? I’m very curious now.

[Her68His69]

Here’s another picture from farther away.

[bcmiller]

Lacquer thinner or a rag works well.

[Her68His69]

Got most of the paint off. I see F0816CO. Vin matches the car.

[bcmiller]

It’s CQ 250ci/155HP L22 - thanks!

I am not sure that head was used on 250 cubic inch engines. It may be original.

It has a smaller combustion chamber and hotrodders would swap heads out to gain compression. Do you know for sure if the head is original?

[Her68His69]

Funny that you are questioning the head. When we got the car, the valve cover was black and the oil cap was the older style upside down cup type, not the flatter style. Sorry, I don't know the proper names. I've never seen a Camaro 250 with a black valve cover, so we repainted it orange. That's all I know about it.

[David K]

You can scrub that area with a scotch brite pad and it should show better.

[Her68His69]

It was mentioned That the head my not be original. Can you please elaborate or tell me where I can find the information. Just a sidebar, it doesn't have a mono leaf suspension. It has a muti leaf. Why would someone change it on a six cylinder?  Just wondering.

[bcmiller]

It was mentioned That the head my not be original. Can you please elaborate or tell me where I can find the information. Just a sidebar, it doesn't have a mono leaf suspension. It has a muti leaf. Why would someone change it on a six cylinder?  Just wondering.

Find what information?  We are researching the use of heads, trying to learn. If you can take the valve cover off, you might find a casting date. It SEEMS that the head you have was used on 194 cubic inch engines. So far we can not find use on a 250, but it is POSSIBLE. That is why we are asking. If we can find it being used on others, then we will know.

As stated above

It has a smaller combustion chamber and hotrodders would swap heads out to gain compression.

[Her68His69]

Hey. I'm just learning too.

[bcmiller]

10-4

Not trying to sound angry or argumentative.

[bcmiller]

I also put a post on the Team Camaro site, hoping to get more data points.

[bcmiller]

4883 X

This was reported from an eBay seller on a 250 cubic inch car that seems fairly original.

[bcmiller]

I looked in my 1968 Chiltons Flat Rate and Parts Manual. It has 2 part numbers but does not have casting numbers.

[bcmiller]

Hey. I'm just learning too.

See above. The same head that you have appears to have been used on a 1967 Camaro with a 250 cubic inch car currently for sale.

[David K]

I found a post stating the 250 weighed more than the 230. Curious about this one.

[bcmiller]

I found a post stating the 250 weighed more than the 230. Curious about this one.

That is not directly on topic, but at least for 1969 that seems to be true based on GM numbers.  A 250 cubic inch car is supposed to be 17 pounds heavier than a 230.  I have also been working on another report that compares height, weight and other dimensions for each year - along with some other factoids that may be of interest to a few.

[bcmiller]

The casting numbers might be in a book called

Chevrolet-Inline-Six-Cylinder-Power-Manual

If any of you have that and could look to see if there might be some casting numbers and usage in there, that would help. Otherwise I might have to buy a copy.

[Her68His69]

I can get a copy to look at, but I’m away till Thursday, If you can wait. It would be the red copy, not the blue.

[bcmiller]

No rush. And don’t buy it just for this purpose. It might not have any casting numbers in it.

[JerryGingras]

Casting: 3927763.  I guess I don't know where to look for casting date on heads - kind of dirty from sitting for 35 years.  Car was 1969 model totaled in 1988 still have 230 engine.  VIN 123379N545064.  Engine pad does not have VIN # only the assembly date/eng code part is stamped.  Have protect-O-Plate, my aunt bought car new in 1969 and I was second /owner.  Car was Torque Drive 2-speed auto (Powerglide without the modulator) had to shift from 1-2 and 2-1 on column manually - engine coded 'F1112AN' and has yellow AN written on rear of block.  Block casting number 3921968, date K 11 68.

[bcmiller]

Jerry, thanks for posting those pics!

The head casting date and a partial casting number should be in the area between the valve springs and the side of the heads. See pic.

Also I think it would be cool in you could post a pic of the yellow AN writing.

[JerryGingras]

ok thanks, the casting date is probably near this "763" I took a pic of yesterday, I'll get back over to the building where it's stored in a week or so and look closer and get that.  Also here's pics of the 'AN' (appears upside down when engine in normal position).

[bcmiller]

Thanks. Yes it will look something like this.

[bcmiller]

Do you see 7763 cast on the outside of the head toward the rear between the spark plugs?

[JerryGingras]

Yes, I did happen to get a pic yesterday of the 7763 on outside of head - think it was on left side, then didn't see anything in the next spot (center) then on the right it had 41F 5060. here are pics left to right (obviously on the side of head w/o intake/exhaust):

[bcmiller]

Thanks for those additional pics.

[David K]

On my block behind the dipstick,  it is an L code....Might as well get the info now instead of later.

[Her68His69]

Just got home. 16 hours of driving. Let me know what else you would like out of the red Santucci manual

[Her68His69]

Having trouble posting pics. Sorry if I post duplicates

[Her68His69]

Hope this is better

[bcmiller]

I will take a closer look but so far doesn’t say anything specifically about Camaro use, correct?

[Her68His69]

I see no mention of Camaro anywhere in the book.

[JerryGingras]

Bryon (bcmiller) - I got the casting date of my head posted about earlier on 10/09, it is K 9 8.  So block was K 11 8 and stamp on pad is F1112AN. So head was cast Saturday Nov. 9, 1968, block was cast Monday Nov. 11, 1968, and engine was built Tuesday, Nov 12, 1968.  Amazing to me that parts moved that fast but I've never studied it that closely before!  Sure many have seen similar.  I do have a matching numbers 1971 Nova I'm going to check out the casting dates of 350 block vs heads vs pad stamp vs TH350 vs vehicle VIN...

[David K]

Thanks B.