Mighty 390 Intake Manifold Question

Dave....It's got a 360 air conditioner already. 3 windows, including sliding rear window, and 60 MPH . Air conditioning is just one more thing to go wrong.

PS: My next Correct Craft will be blue. Red, white, and blue won't be a bad combination.

I know you guys like pictures. Thought I would post a few pictures of "Project 390". Engine and tranny are in. It's been a fun project. Rebuilt both the engine and transmission. Still need to make all the connections, carb, distributor, etc.   

Too many sealants to choose from!! I am probably over-thinking which one to go with. Below is a cut/paste of the various sealants from the Permatex website. The Black does say it can come in contact with antifreeze solutions, which was my biggest worry. So, I guess it's okay to use.     

Ultra Black: Replaces most cut gaskets. Good adhesion and flexibility.

Can come in contact with automotive fluids, such as motor oil, transmission fluids, alcohol and antifreeze solutions. Not recommended for parts in contact with gasoline

Ultra Gray: Valve covers, oil pans, transmission pans, intake manifold end seals, timing covers, water pumps, thermostat housings

Can come in contact with automotive fluids, such as motor oil, transmission fluids, alcohol and antifreeze solutions. Not recommended for parts in contact with gasoline.

Ultra Red: Valve covers, oil pans, timing covers, water pumps, thermostat housings

Replaces almost any cut gasket by making reliable “formed-in-place” gaskets that resist cracking, shrinking and migrating caused by thermal cycling. Coats pre-cut gaskets to increase reliability. Coats pre-cut gaskets to increase reliability. Temperature range -65?F to 650?F (-54°C to 343°C) intermittent; resists auto and shop fluids.

Thanks Peter! I wasn't sure. The Black appears to have the best oil resistance of the Permatex sealers/gasket materials, however, the Ultra Gray appears to be suggested for water pumps and thermostats, so I figured it may work too. Would rather just use one sealant for everything if possible.

I am getting ready to put sealer around the water passages on the intake manifold gasket. Any thoughts as to the best sealant to use?

I just bought a tube of PermaTex Black, but, not sure that is the best. Just wondered what you guys use on your engines?

nice Bike..Heritage Classic?


john

Gary S wrote: 8122pbrainard wrote:     Gary, This is a quiz: What marine engines didn't start off using an automotive or industrial engine? I have one of these marine engines in the garage,no automotive or industrial as far as I can tell

My guess is a 52 or 53'. Isn't it a 10hp looking at that trim ring?

I bet it will look great all freshened up Dave. Where did you go to get the machine work done? The Merc is a 50 I believe,it's on a very long list to get at least a clean up.

I will never forget the 390 Engines with that intake manifold that felt like it weighed 200lbs as you leaned over a hood and tried to install properly without messing up the gaskets. Bad memories. Great running and powerful engines though. Switch to an aluminum intake and save your back. Money well spent.

8122pbrainard wrote:     Gary, This is a quiz: What marine engines didn't start off using an automotive or industrial engine?

I have one of these marine engines in the garage,no automotive or industrial as far as I can tell

Gary S wrote: I have a feeling that the 390 Ford engine was not designed for marine use but in fact Automotive use in mind

Gary,
This is a quiz: What marine engines didn't start off using an automotive or industrial engine?

How about all of you trying Google I might go out on a limb here but I have a feeling that the 390 Ford engine was not designed for marine use but in fact Automotive use in mind 3rd picture says 3/8" NPT. It's called a Intake Water Pump Bypass fitting

peter1234 wrote: it looked to be the transfer tube from the water pump to the intake on fords.. if it is the intake heater it probably will never matter

Peter....thats exactly what it is.

it looked to be the transfer tube from the water pump to the intake on fords.. if it is the intake heater it probably will never matter

i think what he is worried about is the inside diameter of the 3/8 pipe as opposed to the thinner wall steel pipe ,