Author Topic: L6 cylinder head data for a new report  (Read 4576 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 “4888” second one is “4890” third one is “4883F12”
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 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

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Re: L6 cylinder head data for a new report
« Reply #12 on: September 21, 2023, 02:57:12 AM »
It’s 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