1967 -- 427 -- L 89

[Berndt U.]

Hello from Berlin
We have a problem to find the right gasket kit for our 427 L89 engine.
Can we use the Std. Head gasket for this Aluminum cylinder head engine.
Thank you fro your help.
Berndt

[Patrick B.]

Re: 1967 -- 427 -- L 89

The Aluminum head 427 engines were the first Corvette engines to use a composition head gasket rather than a steel shim gasket. The original gaskets were a red-brown color made by Victor and were .039 thick. I think the blue Fel-Pro composition gaskets that are commonly available are a good replacement. Just avoid the steel shim gaskets.

[Joe L.]

Re: 1967 -- 427 -- L 89

Hello from Berlin
We have a problem to find the right gasket kit for our 427 L89 engine.
Can we use the Std. Head gasket for this Aluminum cylinder head engine.
Thank you fro your help.
Berndt

Berndt-----


GM is very "unclear" about this. If one were to strictly follow the P&A catalog, the answer would be that you would use the same gasket as all other 1967 big block applications except HD (i.e. L-88). This would be a steel shim type gasket. However, I don't think a steel shim type gasket was originally used and, if it was used, I think it was a mistake.

1968-69 Corvettes with L-89 used a composition-type gasket and that gasket was originally GM #3921940. That gasket was discontinued many years ago and replaced by GM #10159508 which is also discontinued. I fail to see why 1968-69 L-89 would have required a composition type gasket whereas 1967 did not.

If I were replacing the head gasket in a 1967 L-89, I'd use a Fel-Pro #1027.

[Berndt U.]

Re: 1967 -- 427 -- L 89

Thank you -- but I also need the Intake and exhaust gasket for this
heads. If they round or square ?
Berndt

[Joe L.]

Re: 1967 -- 427 -- L 89

Thank you -- but I also need the Intake and exhaust gasket for this
heads. If they round or square ?
Berndt

Berndt-----


L-89 used RECTANGULAR ("square") ports. The original gasket set was GM #3876198 and the last available gasket set from GM was GM # 3955527 but it's long-since discontinued.

The reproductions gasket sets are very close to the originals in configuration.

No exhaust manifold-to-cylinder head gaskets were originally used and none are required.

[Wayne M.]

Re: 1967 -- 427 -- L 89

[quote=Joe Lucia (12484); .....If I were replacing the head gasket in a 1967 L-89, I'd use a Fel-Pro #1027.[/quote]


Joe -- interesting that you mention the Fel-Pro 1027. I have an old '94 catalog of theirs, and they describe it as Perma Torque Blue Stripe with pre-flattened copper wire ring. Gasket bore 4.370" (which is less than the 4.540" spec on their 1017-1, with a steel wire ring; I suppose for iron head Mark IV's).

Elsewhere, they describe the copper wire ring gaskets "will not Brinell aluminum heads", and offers superior heat dissipation from combustion hot spots (which the 1017-1 description does not mention, other than to state minimum Brinelling on Al heads).

Here's one of a set of 842 heads, dated 6.19.67, that I bought about 15 years ago [one of these days .... ]; Looks like they used Fel-Pro by the blue stripe imprint pattern. Running my fingernail across the ring area, I detect no ridge, so maybe they used the proper copper ring set.

I assume the 1027 is still available. Any suggestions on where can I pick up a set on my upcoming trip from western Canada to Carlisle ? Specialty speed shops ?

[Joe L.]

Re: 1967 -- 427 -- L 89

Joe -- interesting that you mention the Fel-Pro 1027. I have an old '94 catalog of theirs, and they describe it as Perma Torque Blue Stripe with pre-flattened copper wire ring. Gasket bore 4.370" (which is less than the 4.540" spec on their 1017-1, with a steel wire ring; I suppose for iron head Mark IV's).

Elsewhere, they describe the copper wire ring gaskets "will not Brinell aluminum heads", and offers superior heat dissipation from combustion hot spots (which the 1017-1 description does not mention, other than to state minimum Brinelling on Al heads).

Here's one of a set of 842 heads, dated 6.19.67, that I bought about 15 years ago [one of these days .... ]; Looks like they used Fel-Pro by the blue stripe imprint pattern. Running my fingernail across the ring area, I detect no ridge, so maybe they used the proper copper ring set.

I assume the 1027 is still available. Any suggestions on where can I pick up a set on my upcoming trip from western Canada to Carlisle ? Specialty speed shops ?

Wayne-----


Yes, the Fel-Pro 1027 is still available. Summit Racing carries them and, I expect, most other performance automotive shops do, too. I'll bet that most auto parts stores that carry Fel-Pro gaskets can order them.

Also, you can get them under a GM part number. It's GM #12363414. For a larger bore version (4.375-4.540) it's GM #12363413.

[Peter M.]

Re: 1967 -- 427 -- L 89

Joe - is that same for 71 LT-1 where no exhaust manifold gasket? My car has old headers and thinking of going back to mainfold. Let me know.

Thanks

Pete

[Joe R.]

Re: 1967 -- 427 -- L 89

Joe - is that same for 71 LT-1 where no exhaust manifold gasket? My car has old headers and thinking of going back to mainfold. Let me know.

Thanks

Pete

Pete,

I don't believe any of the 427's used a gasket on the exhaust manifold. We'll see what Joe says.

Edit: Whoops, I misread that as L-71 instead of LT-1. That's what I get for being in a hurry!

Joe

[Terry M.]

Re: 1967 -- 427 -- L 89

Joe - is that same for 71 LT-1 where no exhaust manifold gasket? My car has old headers and thinking of going back to mainfold. Let me know.

Thanks

Pete

No exhaust manifold to engine gasket for small blocks up to 1972. I an not sure about newer than that, but Joe Lucia will know.

I was surprised to find exhaust manifold gaskets on the Gen II LT1s with cast iron exhaust manifolds, but the tubular style on Corvettes may have been different.

[Joe L.]

Re: 1967 -- 427 -- L 89

No exhaust manifold to engine gasket for small blocks up to 1972. I an not sure about newer than that, but Joe Lucia will know.

I was surprised to find exhaust manifold gaskets on the Gen II LT1s with cast iron exhaust manifolds, but the tubular style on Corvettes may have been different.

Terry------


1980 Corvettes with 305 cid engine which used tubular manifolds as well as all 1981-82 which also used tubular manifolds did use exhaust manifold-to-cylinder head gaskets.

[Joe L.]

Re: 1967 -- 427 -- L 89

Joe - is that same for 71 LT-1 where no exhaust manifold gasket? My car has old headers and thinking of going back to mainfold. Let me know.

Thanks

Pete

Pete-----


Prior to 1980, no V-8 Corvette engines ever originally used exhaust manifold-to-cylinder head gaskets.

[Terry M.]

Re: 1967 -- 427 -- L 89

I kind of thought the tubular manifolds might have given rise to an exhaust manifold gasket, but I wasn't sure -- and we especially don't see too many of the 305 Corvettes in the Midwest. I can remember seeing only one.

[Jerome P.]

Re: 1967 -- 427 -- L 89

Doe that include the L88 engine?

[Joe L.]

Re: 1967 -- 427 -- L 89

Doe that include the L88 engine?

Jerry-----

If you mean does the non-use of exhaust manifold gaskets include the L-88 engine, the answer is yes. Prior to 1980 NO Corvette V-8 engine originally used exhaust manifold-to-cylinder head gaskets INCLUDING L-88, ZL-1, L-89, and LS-6. Do I think that exhaust manifold gaskets would be a good idea on these engines? Yes, I do. Multi-layer steel type.