TheSamba.com :: View topic - Type IV Gasket between head and intake manifold thickness

Tue Feb 19, 2019 2:52 pm

As simple as a gasket my seem, it can be quite a complicated piece.

Way back there was a gasket that was metal and covered with the paper look a like material . Looked like the single piece ones Vanapplebomb showed but only the round area was raised above the paper look a like.

I guess if the metal failed you still have the paper as a second defense. Especially if you used some sealant

Another try and find item.

Tue Feb 19, 2019 3:04 pm

nextgen wrote: As simple as a gasket my seem, it can be quite a complicated piece.

Way back there was a gasket that was metal and covered with the paper look a like material . Looked like the single piece ones Vanapplebomb showed but only the round area was raised above the paper look a like.

I guess if the metal failed you still have the paper as a second defense. Especially if you used some sealant

Another try and find item.

Aside from cheap Chinese gasket paper....that is sometimes just paper (and thats not always a bad thing if its engineered paper)......gaskets are VERY complex.

If you want to just see a segment of the range and technology of gaskets....spend about 20 minutes on the Garlock site and look around at the gasket types and applications.

They range from molded/formed to stamped to laser and water jet cut. Metals with elastomers formed to them.....engineering plastics like Kalrez and teflon layred with various fibers and rubbers.....vegetable fiber, glass fiber, carbon fiber, mixed sythetic fibers like aramid, chopped glass.....mixed with a wide range of rubber binders like viton, nitrile, epdm, sbr, neoprene....various varnishes/laquer/adhesives......made to work in very specific environments....steam....oils...fuels....radiation...solvents....water.....at temps from hundreds below 0 (cryogenic) and upwards to 1800°F (refinery and refractory).

Gaskets are not simple....real gaskets that is.
Ray

Tue Feb 19, 2019 5:18 pm

Each gasket, I would think for it's application would have to consider
the size of the surface area,the distance between the studs, the torque per stud required to apply the correct psi for that particular gasket material.

Tue Feb 19, 2019 6:22 pm

nextgen wrote: OK Ray now that I woke you from hibernation -- Ha.

Good to hear from you.

So what gasket do you prefer Not the phenolic - the other two--

-for carb to the manifold -----the metal or the cellulose usually mixed with some cotton fiber,what ever that one is made of from Aircooled.net.

Also sealant or not.

It's of a thick fibrous type material. Well made and holds up to fuel very well.

Tue Feb 19, 2019 9:15 pm

udidwht After all the high tech talk and don't me wrong appreciated it..

I believe the one you show me from Aircooled is the good enough for me.

The metal one shot gasket would be fine but I to move my manifold around in a tight spot, may just hit it and then later find out I have a leak.

Thanks

Wed Feb 20, 2019 12:46 am

nextgen wrote: udidwht After all the high tech talk and don't me wrong appreciated it..

I believe the one you show me from Aircooled is the good enough for me.

The metal one shot gasket would be fine but I to move my manifold around in a tight spot, may just hit it and then later find out I have a leak.

Thanks

Ray hit it right with respect to what's available for the T-4 application....

Not much compared to years back.

I give em a coat of Chapstick before install (both sides).

Wed Feb 20, 2019 7:57 am

udidwht wrote: nextgen wrote: udidwht After all the high tech talk and don't me wrong appreciated it..

I believe the one you show me from Aircooled is the good enough for me.

The metal one shot gasket would be fine but I to move my manifold around in a tight spot, may just hit it and then later find out I have a leak.

Thanks

Ray hit it right with respect to what's available for the T-4 application....

Not much compared to years back.

I give em a coat of Chapstick before install (both sides).

:lol: .....you know.....in theory ....(not saying exactly "chapstick").....thats a pretty good idea!

I saw some really interesting gaskets a while back.....they were for a machine that uses heat and water in its process....among other things. They were veggie fiber gaskets.....like the one shown earlier in this thread....but had a high temperature wax or paradfin mixture coating on each side.
They were designed to be installed......and then brought up to max, peak operating temp...which is about where the wax was designed to flow.....and then retorqued.

The tech rep for the machine noted that they were designed this way so that at operating temp the wax flows and is squeezed into the pores between the fibers filling microscopic pores that could not be eliminated during the manufacturing process because they were too small for imprinted, sprayed or roll coated outer surface coatings to flow into.

This also compacted the gasket slightly making it higher in density. Worked great!
It was a medium pressure joint....maybe 125 psi. Ray