Author Topic: L6 cylinder head data for a new report  (Read 4575 times)

bcmiller

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L6 cylinder head data for a new report
« on: July 03, 2023, 01:13:35 PM »
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.
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

67conv6cyl

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Re: L6 cylinder head data for a new report
« Reply #1 on: July 03, 2023, 10:11:24 PM »
1967 250 engine
04A build date on car trim tag
There are 3 casting numbers on head first one is ď4888Ē second one is ď4890Ē third one is ď4883F12Ē
Engine bock assembly stamp is F0402LN

Her68His69

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Re: L6 cylinder head data for a new report
« Reply #2 on: July 05, 2023, 05:57:05 PM »
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

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Re: L6 cylinder head data for a new report
« Reply #3 on: July 15, 2023, 03:52:53 PM »
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?

« Last Edit: July 15, 2023, 04:17:14 PM by bcmiller »
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

Her68His69

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Re: L6 cylinder head data for a new report
« Reply #4 on: July 15, 2023, 06:09:41 PM »
All numbers from the outside of the block, passenger side.

bcmiller

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Re: L6 cylinder head data for a new report
« Reply #5 on: July 15, 2023, 07:42:36 PM »
I found some on ebay and the seller is allowing me to use them.  Numbers are under the valve cover.
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

bcmiller

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Re: L6 cylinder head data for a new report
« Reply #6 on: September 11, 2023, 03:54:03 PM »
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.
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

bcmiller

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Re: L6 cylinder head data for a new report
« Reply #7 on: September 20, 2023, 03:50:40 PM »
Anybody want to contribute some head data on their L6 engine?
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

David K

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Re: L6 cylinder head data for a new report
« Reply #8 on: September 20, 2023, 05:51:11 PM »
I'll upload mine later today

bcmiller

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Re: L6 cylinder head data for a new report
« Reply #9 on: September 20, 2023, 06:06:17 PM »
Thank you David.

Is there anyone else you know with an original L6 that might have a different casting number?
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

David K

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Re: L6 cylinder head data for a new report
« Reply #10 on: September 20, 2023, 06:52:22 PM »
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

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Re: L6 cylinder head data for a new report
« Reply #11 on: September 21, 2023, 02:55:13 AM »
I love ya B, but Iím 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

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Re: L6 cylinder head data for a new report
« Reply #12 on: September 21, 2023, 02:57:12 AM »
Itís a bit tricky getting the camera to focus past the compressor.  Hope these help.

Her68His69

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Re: L6 cylinder head data for a new report
« Reply #13 on: September 22, 2023, 05:26:01 PM »
Please look at my previous post. My block is 3921967.

bcmiller

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Re: L6 cylinder head data for a new report
« Reply #14 on: September 22, 2023, 07:53:45 PM »
I can take a look at the engine casting report. It might be an error in your casting number.
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

Her68His69

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Re: L6 cylinder head data for a new report
« Reply #15 on: September 23, 2023, 01:21:19 AM »
Thanks, That would be great.

David K

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Re: L6 cylinder head data for a new report
« Reply #16 on: September 25, 2023, 08:16:27 PM »
More here

David K

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Re: L6 cylinder head data for a new report
« Reply #17 on: September 25, 2023, 08:17:17 PM »
Another

bcmiller

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Re: L6 cylinder head data for a new report
« Reply #18 on: September 26, 2023, 12:05:58 AM »
So your head casting number ends in 7763 ?

Then the full number would be 3927763.
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

David K

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Re: L6 cylinder head data for a new report
« Reply #19 on: September 26, 2023, 05:13:14 AM »
B-thatís not my carÖdid you more/better pictures?

bcmiller

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Re: L6 cylinder head data for a new report
« Reply #20 on: September 26, 2023, 02:43:52 PM »
B-thatís not my carÖdid 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.
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

KurtS

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Re: L6 cylinder head data for a new report
« Reply #21 on: September 28, 2023, 07:11:55 PM »
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?

Kurt S
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Her68His69

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Re: L6 cylinder head data for a new report
« Reply #22 on: September 28, 2023, 10:35:32 PM »
Hi Kurt, thanks for looking. The number looks to be 4883.

bcmiller

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Re: L6 cylinder head data for a new report
« Reply #23 on: September 28, 2023, 11:28:31 PM »
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

Her68His69

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Re: L6 cylinder head data for a new report
« Reply #24 on: September 29, 2023, 01:00:16 AM »
No problem. i will do it ASAP

Her68His69

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Re: L6 cylinder head data for a new report
« Reply #25 on: September 29, 2023, 12:55:07 PM »
Nothing there that I can see. Iíve heard that itís not uncommon for six to have nothing there. Is that true? Thanks

bcmiller

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Re: L6 cylinder head data for a new report
« Reply #26 on: September 29, 2023, 01:46:45 PM »
That doesnít seem to be the correct spot.

Look from the top, passenger side, between the area of the dipstick and the distributor.
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

David K

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Re: L6 cylinder head data for a new report
« Reply #27 on: September 29, 2023, 02:12:51 PM »
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

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Re: L6 cylinder head data for a new report
« Reply #28 on: September 29, 2023, 02:56:24 PM »
I can take the paint off in that one little area. What would be best to use? Iím very curious now.

Her68His69

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Re: L6 cylinder head data for a new report
« Reply #29 on: September 29, 2023, 02:59:02 PM »
Hereís another picture from farther away.

bcmiller

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Re: L6 cylinder head data for a new report
« Reply #30 on: September 29, 2023, 05:28:25 PM »
Lacquer thinner or a rag works well.
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

Her68His69

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Re: L6 cylinder head data for a new report
« Reply #31 on: September 30, 2023, 10:08:17 PM »
Got most of the paint off. I see F0816CO. Vin matches the car.

bcmiller

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Re: L6 cylinder head data for a new report
« Reply #32 on: September 30, 2023, 10:45:15 PM »
Itís 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?

« Last Edit: September 30, 2023, 11:12:05 PM by bcmiller »
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

Her68His69

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Re: L6 cylinder head data for a new report
« Reply #33 on: October 01, 2023, 01:32:02 AM »
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

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Re: L6 cylinder head data for a new report
« Reply #34 on: October 01, 2023, 04:04:43 AM »
You can scrub that area with a scotch brite pad and it should show better.

Her68His69

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Re: L6 cylinder head data for a new report
« Reply #35 on: October 01, 2023, 08:25:56 PM »
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

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Re: L6 cylinder head data for a new report
« Reply #36 on: October 01, 2023, 09:30:48 PM »
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.
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

Her68His69

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Re: L6 cylinder head data for a new report
« Reply #37 on: October 02, 2023, 12:45:51 AM »
Hey. I'm just learning too.

bcmiller

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Re: L6 cylinder head data for a new report
« Reply #38 on: October 02, 2023, 01:40:51 AM »
10-4

Not trying to sound angry or argumentative.
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

bcmiller

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Re: L6 cylinder head data for a new report
« Reply #39 on: October 04, 2023, 10:11:18 PM »
I also put a post on the Team Camaro site, hoping to get more data points.
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

bcmiller

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Re: L6 cylinder head data for a new report
« Reply #40 on: October 05, 2023, 12:28:31 AM »
4883 X

This was reported from an eBay seller on a 250 cubic inch car that seems fairly original.
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

bcmiller

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Re: L6 cylinder head data for a new report
« Reply #41 on: October 05, 2023, 12:30:29 AM »
I looked in my 1968 Chiltons Flat Rate and Parts Manual. It has 2 part numbers but does not have casting numbers.
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

bcmiller

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Re: L6 cylinder head data for a new report
« Reply #42 on: October 05, 2023, 02:30:35 AM »
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.
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

David K

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Re: L6 cylinder head data for a new report
« Reply #43 on: October 05, 2023, 02:16:39 PM »
I found a post stating the 250 weighed more than the 230. Curious about this one.

bcmiller

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Re: L6 cylinder head data for a new report
« Reply #44 on: October 05, 2023, 04:50:55 PM »
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.
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

bcmiller

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Re: L6 cylinder head data for a new report
« Reply #45 on: October 06, 2023, 03:18:11 PM »
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.
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

Her68His69

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Re: L6 cylinder head data for a new report
« Reply #46 on: October 06, 2023, 07:17:09 PM »
I can get a copy to look at, but Iím away till Thursday, If you can wait. It would be the red copy, not the blue.

bcmiller

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Re: L6 cylinder head data for a new report
« Reply #47 on: October 06, 2023, 07:38:13 PM »
No rush. And donít buy it just for this purpose. It might not have any casting numbers in it.
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

JerryGingras

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Re: L6 cylinder head data for a new report
« Reply #48 on: October 09, 2023, 01:02:06 AM »
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

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Re: L6 cylinder head data for a new report
« Reply #49 on: October 09, 2023, 11:56:56 AM »
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.
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

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Re: L6 cylinder head data for a new report
« Reply #50 on: October 09, 2023, 12:12:54 PM »
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

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Re: L6 cylinder head data for a new report
« Reply #51 on: October 09, 2023, 01:21:30 PM »
Thanks. Yes it will look something like this.

Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

bcmiller

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Re: L6 cylinder head data for a new report
« Reply #52 on: October 09, 2023, 05:53:51 PM »
Do you see 7763 cast on the outside of the head toward the rear between the spark plugs?
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

JerryGingras

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Re: L6 cylinder head data for a new report
« Reply #53 on: October 09, 2023, 08:31:22 PM »
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

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Re: L6 cylinder head data for a new report
« Reply #54 on: October 09, 2023, 08:39:30 PM »
Thanks for those additional pics.
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

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Re: L6 cylinder head data for a new report
« Reply #55 on: October 10, 2023, 11:39:53 PM »
On my block behind the dipstick,  it is an L code....Might as well get the info now instead of later.

Her68His69

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Re: L6 cylinder head data for a new report
« Reply #56 on: October 12, 2023, 01:22:03 AM »
Just got home. 16 hours of driving. Let me know what else you would like out of the red Santucci manual

Her68His69

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Re: L6 cylinder head data for a new report
« Reply #57 on: October 12, 2023, 01:26:08 AM »
Having trouble posting pics. Sorry if I post duplicates

Her68His69

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Re: L6 cylinder head data for a new report
« Reply #58 on: October 12, 2023, 01:27:20 AM »
Hope this is better

bcmiller

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Re: L6 cylinder head data for a new report
« Reply #59 on: October 12, 2023, 03:11:26 PM »
I will take a closer look but so far doesnít say anything specifically about Camaro use, correct?
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

Her68His69

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Re: L6 cylinder head data for a new report
« Reply #60 on: October 12, 2023, 03:50:39 PM »
I see no mention of Camaro anywhere in the book.

JerryGingras

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Re: L6 cylinder head data for a new report
« Reply #61 on: October 17, 2023, 11:08:47 PM »
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

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Re: L6 cylinder head data for a new report
« Reply #62 on: October 24, 2023, 03:35:18 AM »
Thanks B.

 

anything