225v6 intake manifold sealing trick

The prior owner of my Jeep had snapped a bolt where Carb mounts. Then I noticed a leak, or leaks at front right and rear of manifold. I'm going to extract the broken bolt. Anyone have luck getting intake to seal up well. The prior owner did use rtv at corners where leaks originated.
Thanks.

 

I don't use the rubber gasket in the front and rear of the intakes
I apply a nice tall bead of rtv along the motor and a little extra on the corners and drop the intake onto that.

 

Moved to proper forum.
What cj6/442 said. Very common to do on older V-type engines and it works.

 

Yep, but be sure the faying surfaces of the mating parts are CLEAN!!!

Spray can brake clean works well----------some kind of solvent is mandatory, do not rely on just wiping down the parts with a rag.

 

Thanks for the replies. I'm going to use the rtv without the rubber gaskets. Hopefully bolt comes out and I'll finally seal that leak.

 

Don't use the RED RTV because it doesn't like fuel or oil. It will soften and be sucked away from the mating surfaces.

 

I've had good luck with " the Right Stuff" by Permatex.

 

I'm not sure that is a universal statement.

I've used Permatex's "Ultra Copper" high temp RTV on literally hundreds of jobs from differentials to just about every piece of an engine that requires sealing and have yet to see any softening of the material. It is, in fact, a royal pain in the butt to remove sometimes. It can be used successfully on intake manifolds.

 

Took manifold to machine shop to get cleaned and have busted stud extracted. The prior owner just had block rebuilt, but he put on all manifolds himself. It's worth it to me for the money to have all surfaces prepped for assembly. My bolt extracting skills ain't what they used to be.

What sealant should I use? Will hylomar work?

 

I prefer "The Right Stuff" or "RTV Ultra Black".
That does not make Duffer's preference wrong. We all have our preferences. I've never used the sealer you mentioned so have no input on that. I only know what has worked for me over the years.


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"Ultra Copper" and "High Temp Red RTV" are two different products. "High Temp Red RTV" is typically not petroleum friendly. It's more intended for exhaust gaskets like egr valve gaskets, etc. IMHO it's a band aid for a problem that should be fixed correctly.


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Saw manifold yesterday after being cleaned and blasted at machine shop. The carb mount surface was pitted pretty badly, so it's getting flat-planed today. That's been source of my vacuum leak the whole time. Oh well, needs to be right. Hopefully putting it together this week.