V6 Magnum Gaskets

[beerman]

Anybody have a source for Magnum gaskets?

Fel-Pro MS90065 INTAKE MANIFOLD SET
Fel-Pro MS90066 EXHAUST MANIFOLD SET

[Funky61]

Tough to find; I recently bought a "conversion" gasket set that had everything but the top end, from eBay.

Someone had posted about a place that would make you a set but that's all I recall.

[BobBray]

You can try these guys:

http://www.olsonsgaskets.com/

[Chuck78]

Cometic can make custom gaskets. Also gasketstogo.com can do custom MLS (multi layer steel) gaskets whereas Cometic will not do one offs or small batches of MLS gaskets.

[beerman]

Here are the contents of the felpro gasket set for non magnum engines

FS 7962 SB-2

Qty Part No Description
6 5112 Valve Stem Seal
2 5181 Fuel Pump Mounting
1 5198 Air Cleaner
1 6193 Carburetor to Intake Manifold
2 6194 Insulator to Manifold
2 7962 SB-2 Head Gasket
2 9093 Carburetor to Intake Manifold
2 9598 Carburetor Mounting
2 9672 Exhaust Pipe Flange
2 9674 Intake Manifold
2 9675 Exhaust Manifold
1 11920 C Oil Pan Drain Plug
2 R 12932 Valve Cover
1 MB12933 Oil Pan
1 R 12935 Push Rod Cover
1 K 12936 Timing Cover Cap
1 12937 Timing Cover Cap
1 12938 Oil Filter Housing
1 P 12940 Oil Filter Pad
1 12943 Water Outlet
2 R 12944 Cylinder Block Seal
2 A 12945 Oil Pump Tube to Block
1 12947 Water Pump
1 12948 Rear Main Bearing Cap
1 12967 Water Pump to Block
1 12974 Crankshaft Rear Cover
1 P 12975 Distributor to Block
1 13788 Air Cleaner
1 301162 Air Compressor Mounting
2 400448 Rear Main Bearing Seal
3 60053 Carburetor Mounting
1 60056 Carburetor to Insulator
1 70121 Oil Pump to Block
1 70363 Oil Filter Mounting
1 90931 Timing Cover Seal

[bobdylan]

I think I have magnum intake gaskets. I have not looked for a while. PM me with an offer and I will ee if I can find them. Bob

[Charon]

You can make head gaskets out of 16 gauge copper sheet. I do it all the time for antique engines. Gmc v6 used copper on the early motors. And it's all I use on the ones I redo.

[Chuck78]

http://www.gasketstogo.com custom makes gaskets in any material and and configuration. I have used them for VW diesel engines with great success (as well as loads of early vw diesel & rabbit/caddy pickup truck owners) & am also using them for some custom big bore Suzuki GS 4 cyl motorcycle multi-layer steel head gaskets.

On the MLS gaskets at least, there is a big price break when purchasing 5 or more gaskets, due to tooling/setup involved.

[Chuck78]

You can make head gaskets out of 16 gauge copper sheet. I do it all the time for antique engines. Gmc v6 used copper on the early motors. And it's all I use on the ones I redo.


What tooling do you use and how do you cut the copper sheet?


Here are the contents of the felpro gasket set for non magnum engines

FS 7962 SB-2

Qty Part No Description
6 5112 Valve Stem Seal
2 5181 Fuel Pump Mounting
1 5198 Air Cleaner
1 6193 Carburetor to Intake Manifold
2 6194 Insulator to Manifold
2 7962 SB-2 Head Gasket
2 9093 Carburetor to Intake Manifold
2 9598 Carburetor Mounting
2 9672 Exhaust Pipe Flange
2 9674 Intake Manifold
2 9675 Exhaust Manifold
1 11920 C Oil Pan Drain Plug
2 R 12932 Valve Cover
1 MB12933 Oil Pan
1 R 12935 Push Rod Cover
1 K 12936 Timing Cover Cap
1 12937 Timing Cover Cap
1 12938 Oil Filter Housing
1 P 12940 Oil Filter Pad
1 12943 Water Outlet
2 R 12944 Cylinder Block Seal
2 A 12945 Oil Pump Tube to Block
1 12947 Water Pump
1 12948 Rear Main Bearing Cap
1 12967 Water Pump to Block
1 12974 Crankshaft Rear Cover
1 P 12975 Distributor to Block
1 13788 Air Cleaner
1 301162 Air Compressor Mounting
2 400448 Rear Main Bearing Seal
3 60053 Carburetor Mounting
1 60056 Carburetor to Insulator
1 70121 Oil Pump to Block
1 70363 Oil Filter Mounting
1 90931 Timing Cover Seal

Is that for a 305 or 351? I would assume that most everything crosses over between the two except the head gasket, correct?

[beerman]

the set was for 351s and 401s

All but the magnum top end gaskets should fit the 305

[bobdylan]

305 set is available, fs 7961 sb-1

[beerman]

Now that I have an intake set (thanks again bob), I'm looking into what it would take to get a cricut type cutter to make a few sets of the intake gaskets or at least provide a pattern for members. I have a sheet of fel-pro exhaust gasket material and need to create a template for those gaskets.

I also have been emailing a place in Canada that claims they can get them but I asked that they verify availability before I place the order. Much like the 3 other places I found that that listed them on their websites. if they can get them I'll post it.

[Charon]

Paper gaskets are simple to make with a small ball peen hammer. Copper head gaskets. I drill all the holes on a small drill press. The cylinders. I get to a 1/8 inch using a cutter in a mill. Backing the copper with plywood. Then I glue the copper to the block with hi-tack. Plus a couple of bolts. Then I put the boring bar on the block. And set the cutter to the bore and back it up through the copper. Perfect fit. Then aneall the copper and spray a little copper cost spray. Takes about an hour to make a set.

[beerman]

The Canadians fell through so I went ahead and bought a used digital scrapbooking cutter in order to replicate Magnum intake gaskets. I'm still hunting for a good gasket material the FelPro Karropak looks a little too thin @1/16"

[bobdylan]

I have ordered from are friends to the North before, with same results, even called them and they said they could get them, but after a week to 10 days I would get a refund, but never hurts to try.

[beerman]

Here is a template of the Magnum exhaust gasket that I made. Still might need some final tweaking. Im going to try dry run with the cutter on thin cardboard tomorrow. It can do multiple cuts so hopefully it can do the gasket material.

[63gmc4x4]

I'm also in need of intake and exhaust gaskets for my 351E, any will be appreciated, thanks

[snazzypig]

I could also use a set of the Magnum exhaust gaskets if you make some.

[Quigley]

I thought the intake Gaskets on a magnum motor were the same as a 305,only the exhaust has larger ports. Dave

[63gmc4x4]

no the magnum and E engines are larger port intake and exhaust, luckily my old intake gaskets are intact will maybe ill have to copy them make my own

[Quigley]

no the magnum and E engines are larger port intake and exhaust, luckily my old intake gaskets are intact will maybe ill have to copy them make my own

I have a 401M and have have had the intake off, 305 Gaskets fit fine on the intake side. Also had a full set of 305 Gaskets and a full set of 401 Magnum Gaskets there was No difference on the intake side either on the motor or the gasket sets. Exhaust was much bigger on the Magnun. Dave

[63gmc4x4]

they are different as you can in these pictures, the 305 may work but not right and may cause Intake leak luckily my old gaskets may still be usable

[63gmc4x4]

this is my 351E which is the same as the 351M and 401M with the larger ports on both the manifold and head, someone put a 305 small port intake this engine at one time if look close at my pictures you can see it was sealed correctly

[Chuck78]

You can try these guys:

http://www.olsonsgaskets.com/


I looked them up, but they have nothing in their catalog for 1960+ GMC truck specific engines. They can hand cut custom gaskets, but only paper/felt/etc, no head gaskets or anything with rolled metal sealing areas.

I have had some good luck with http://www.gasketstogo.com on Custom Suzuki 4 cylinder motorcycle & VW 4 cylinder IDI diesel MLS head gaskets in Multi-Layer Steel gaskets. They can custom make about anything. Sending a proper CAD drawing is best. We had some alignment issues on one batch of Suzuki GS650 custom big bore gaskets, but when a CAD drawing was sent for the re-make in lieu of a gasket scan or used gasket sample, all came out well.

[63gmc4x4]

thanks but I'm not computer wizard dont know how to do cad drawings of my old gaskets, and I dont want to send mine to Thailand I'm gonna look into reusing them or finding some gasket stock and making my own, thanks though

[63gmc4x4]

Anybody have a source for Magnum gaskets?

Fel-Pro MS90065 INTAKE MANIFOLD SET
Fel-Pro MS90066 EXHAUST MANIFOLD SET

did you every find a set ?I know this post is over 2 years old

[Chuck78]

If I recall, someone on this forum has CAD drawings of many of our big block V6 gaskets already made up.

Cutting paper/felt/neoprene/viton/etc isnt too difficult. The rubbery materials are a bit tougher. A set of hole punch pliers or hollow point punches really help.

[Quigley]

Felpro 305 intake Gaskets will work fine on a magnum motor. Surface the exhaust manifolds on a belt sander surface machine and don't use Gaskets on them and your in business. Don't over complicate, that is my experience. Dave

[63gmc4x4]

your probably right, but what is the point of the larger free flowing intake manifold if it blocked by 1/2 inch hanging in gasket material from the smaller gaskets

[63gmc4x4]

If I recall, someone on this forum has CAD drawings of many of our big block V6 gaskets already made up.

Cutting paper/felt/neoprene/viton/etc isnt too difficult. The rubbery materials are a bit tougher. A set of hole punch pliers or hollow point punches really help.
has anyone got some? or has anyone made there own gaskets

[beerman]

I tried to make magnum exhaust gaskets out of a sheet of the same material as the regular exhaust gaskets. The scrapbook cutter I used didn't have enough pressure to cut the material. I wound up cutting them out manually. I was able to get set of magnum intakes from a board member.

[Quigley]

your probably right, but what is the point of the larger free flowing intake manifold if it blocked by 1/2 inch hanging in gasket material from the smaller gaskets

They do not block anything,they are the same size. I have a 401M motor and 3 305s. The head ports are the same on the 401M,the only difference is the design of the 401 intake and the port for two cylinders are combined 305 Gaskets will work perfectly and not block anything. Dave

[63gmc4x4]

you must have a different 401M if the port size is the same as the 305, my 351E port size is alot bigger thus using a smaller 305 gaskets it hangs into the flow of the air/fuel mixture coming in, and or doesn't cover the complete gasketa surface area onto the outer edge ,sure it may seal up okay but may leak over time I just dont like the gasket haanging in the way from intake into cylinder head, did you see my pictures?

[63gmc4x4]

I'll post another picture tomorrow of the size difference of the ports 305 vs 351E, then may you can understand what I'm trying to accomplish, maybe I have a one of kind 351E with very large ports or the 401M were smaller then the 351E? I've only had 305s apart this is my first 351, you can clearly see the differences in size with naked eye, thanks

[Ed Snyder]

They do not block anything,they are the same size. I have a 401M motor and 3 305s. The head ports are the same on the 401M,the only difference is the design of the 401 intake and the port for two cylinders are combined 305 Gaskets will work perfectly and not block anything. Dave

When I bought my 401M many years ago, it came with non-Magnum heads and manifolds. It's possible yours did too.

[63gmc4x4]

They do not block anything,they are the same size. I have a 401M motor and 3 305s. The head ports are the same on the 401M,the only difference is the design of the 401 intake and the port for two cylinders are combined 305 Gaskets will work perfectly and not block anything. Dave

, possibly you dont have M intake or heads, do you have any pictures?

[Quigley]

, possibly you dont have M intake or heads, do you have any pictures?

They are Magnum heads. The Exhaust ports are much larger. On the intakes 305 Felpro Gaskets fit perfect Magnum motors have larger exhaust ports and a redesigned intake manifold,not large intake ports. Dave

[63gmc4x4]

well the gaskets are not even close to the same as such they will hang in the air fuel path causing performance problem so i will be copying my old gaskets and making my own, pictures to follow

[63gmc4x4]

well when you cant buy them make them!