Questions regarding intake and exhaust manifolds for 292 Y-block

[zuburg]

I’ve been reading a bunch of posts about using gaskets or not on exhaust manifolds on a 292. What is the final consensus? If the consensus is use a gasket, which of the 2 gaskets in the picture should I use? The silver one?

Also, which of the 2 intake manifold gaskets in the picture should I use, the very one with silver around the middle opening?

[streetdreams]

As far as the intake gaskets, it depends on the intake manifold. Any intake other than the ECZ-B and maybe the later '59 and up 2 barrel intake will use the gasket with smaller ports, looks like the upper in your picture. Exhausts, maybe someone here in the forum can comment.

[Oldmics]

Henry said -NO GASKETS ON EXHAUST


Just make sure that your exhaust manifolds are straight.


I have my exhaust manifolds milled before assembly on engines that use standard exhaust manifolds.


Oldmics

[miker98038]

X2 on the exhaust. Use the intake with the best port match. If there’s an insert with a smaller opening for the exhaust cross over (I think it was designed for heavy loads in trucks) you can use that also. If not doing a lot of cold weather driving, and using a manual or electric choke, you can block the exhaust crossover completely with thin metal.

[KULTULZ]

IMO ONLY!

INTAKE MANIFOLD GASKET SET-

w/ Restricted Cross-over Port(s) even if using OEM choke assy.



Intake gaskets are the same from 1955/ .


EXHAUST MANIFOLD GASKET-

As was previously said so eloquently...

A PASS CAR engine uses no exhaust manifold gasket, assembly is metal to metal. But both surfaces must be completely flat and machined if necessary. The attaching hardware must be in good condition and torqued down evenly to torque values (in Shop Manual). Under no circumstances should composite exhaust gaskets be used.

Now if the head surface is not too badly true and you don't want to pull them for machining, a truck type steel shim gasket can be used.

[dmsfrr]

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Exhaust gaskets: one school of thought is that the 'crush' in the initial thickness of the gasket combined with over-torquing the bolts can lead to cracked & broken exhaust manifolds.
I'm intending to use mine without and see what happens...

Intake manif gaskets: There are sets readily available with a smaller center hole for the exhaust crossover. These help prevent scorching the paint on the exhaust crossover of the intake manifold.
.

[KULTULZ]

Originally Posted by dmsfrr

Exhaust gaskets: one school of thought is that the 'crush' in the initial thickness of the gasket combined with over-torquing the bolts can lead to cracked & broken exhaust manifolds.

I'm intending to use mine without and see what happens...

Correct, there are two opinions on exhaust manifold gaskets and here is the other view- http://fme-cat.com/livedocs/Exhaust%...old%20Sets.pdf

Let's say you have a fleet of Y-BLOCK powered trucks. It would be cost prohibitive to have to go through the machining drill every time one was in for service. A QUALITY gasket (along with proper hardware and torquing) can save a lot of time and money.

On the other hand, a dedicated restore would be gigged for the gaskets.

[paul2748]

I've always used gaskets on the exhaust manifolds. Never had any crack. When installing the manifolds, I always start at the middle of the manifold and work outwards, just like doing head bolts. And don't fully tighten them all at once - just like head bolts. And don't use all the strength you have.

[Daves55Sedan]

I have always used exhaust manifold gaskets on both my 292 engines and never had a crack in any of the manifolds. I have always used the truck intake manifold gaskets (they have the small round hole for the heat riser passage). My intake manifolds were cleaned and painted with ford red/orange engine paint decades ago and all the red paint is still there. If you use the intake manifold gaskets for the car engine (with large square hole in the middle), the red paint on the heat riser passage will burn completely off very quickly.

[Motorhead6]

I have also never cracked an exhaust manifold using gaskets. If there is concern with this issue, consider using copper gaskets which are readily available. As for someone wanting to gig you for using a gasket, Ford shops probably used them on engines with miles on it or had to deal with come-backs.

[KULTULZ]

Originally Posted by Motorhead6

As for someone wanting to gig you for using a gasket, Ford shops probably used them on engines with miles on it or had to deal with come-backs.

Yes, service shops did use the gaskets but what is being discussed here (I think) is a dedicated restoration or retro build. The engine came assembled with no gasket (and there is/was a good reason). This continued with the FE/MEL later.

[KULTULZ]

Originally Posted by zuburg

Also, which of the 2 intake manifold gaskets in the picture should I use, the very one with silver around the middle opening?

Yes, the 2nd gasket shown as it is better quality.

I am not sure of the quality of gaskets sold by the USUAL SUSPECTS but suggest you research sites such as TED EATON and MUMMERT to see what is used on their builds.

Gasket quality varies from manufacturers greatly.

[KULTULZ]

Originally Posted by Motorhead6

If there is concern with this issue, consider using copper gaskets which are readily available.

Example Shown-





And also important is the correct hardware. GRADE 5 @ the minimum (stay away from HOME DEPOT) and hardened lock washers.