Adheasive or Silicone for Intake install

[Don Ursery]

Hello,
I'm installing my alumn. intake onto 327/340hp, '62 engine. Is it necessary to use "Super Adheasive" or can the colored Silicones "RTV gasket makers" type material be used? I have an old tube of Permenantex(?) "Super Adheasive" left over from my '66 restore. It's definitely too old to use, but I was just wondering if this is necessary, or can the RTV Silicone be use? Are they similar in what they both accomplish? I have Gold, Red, Blue, and Clear RTV Silicone tubes (still new in packages). Again, thanks to everyone, I truly appreciate the information and time to respond. Take care & keep in touch...Don

[Joe L.]

Re: Adheasive or Silicone for Intake install

Don------

I use and recommend the use of RTV silicone on the intake manifold gaskets. Using stock-type, embossed intake manifold gaskets, I use just a very light bead around the water cross-over passages on the front and rear of the gaskets. Then, use the RTV in place of the end seals. That's all you need. You should not need to apply any around the intake ports or other areas of the gaskets.

I use and recommend Permatex Ultra Copper (best) or Ultra Black.

[Don Ursery]

Re: Adheasive or Silicone for Intake install

Joe,
Thanks for your help. Is this true for the water pump,fuel pump, thermo., distributor gaskets too? Again, thank you...Don

[Joe L.]

Re: Adheasive or Silicone for Intake install

Don-----

Yes, use the same RTV for the water pump and thermostat gaskets. However, if the gaskets that you use for these have the rubber bead on them, then no RTV is necessary. The fuel pump-to-fuel pump plate mounting gasket usually requires no sealer; use RTV on the plate-to-block gasket, though. Use NO sealer on the round distributor gasket.

[Don Ursery]

Re: Adheasive or Silicone for Intake install

Joe,

Again, I can't thank you enough. It may seem trivial, but information like this just helps in so many ways. I'm still getting use to the fact of double gaskets with the water pump and motor mount brace. This '62 is so different in many ways compared to my '66. Again, thanks, take care & keep in touch...Don

[Patrick H.]

Re: Adhesive or Silicone for Intake install

Don,

I agree that the PermaTex Ultra Copper is the best. As it's sort of nearly orange, it's also easy to cover with paint later on, too.

I differ on the gaskets, though. I prefer Fel-Pro Performance (be sure to specify Performance) gaskets with their PrintoSeal surfaces. The Fel-Pro's are slightly thicker than the originals and after 40+ years, I think that will be useful, if not even necessary. I've tried the stock gaskets on two motors now and had both sets leak. Both were then replaced with the Fel-Pro gaskets, and no longer leak at the intake-to-head surface. To use these gaskets, put a very small bead of RTV sealant around the crossover passage as well as the water passages. To be honest, I put a VERY thin bead around each and every port whether it had PrintoSeal or not, and went from using a quart of oil every 300-400 miles, to not using oil all summer so far at 1500+ miles. So, at least on my car, it worked. My original stock replacement gaskets were sealed similarly, so I don't think that was what fixed it.

As original intake gaskets had a certain tab shape cut into them, you may want to modify the Fel-Pro gasket to have the same shape. Or, as John Hinckley would say, you can "Take the Hit" on configuration points, and just leave it.

Just my $.02

Patrick

[Don Ursery]

Re: Adhesive or Silicone for Intake install

Patrick,
Thanks a million on all your information and recommendations. I did obtain Fel-Pro Blue already (I used them on my '66 and haven't had a single leak yet). Again, thanks and hopefully I'll be able to stay in touch with everyone during my restoration...Don