77 LTD II

[rusty ol ranger]

Some pipe thread is tapered, others not...

Im not sure. I know the plugs i bought (i think from summit?) said they were for a 302/351W...must be something im missing.

Could they be inverted flare fittings?

Call me dumb but im not 100% sure what that is

 

[Blmpkn]

Call me dumb but im not 100% sure what that is

.....neither do I I just know I need some for the caddy and the guy at napa was cranky when I asked if he had any.

 

[snoranger]

Im not sure. I know the plugs i bought (i think from summit?) said they were for a 302/351W...must be something im missing.


Call me dumb but im not 100% sure what that is

.....neither do I I just know I need some for the caddy and the guy at napa was cranky when I asked if he had any.

The thermactor plugs for the back of the heads on a Windsor motor are 5/8-11. They are not pipe thread.
The caddy probably used the spider looking manifolds and pumped air in at every exhaust port. That style used inverted flare like the end of a brake line.

 

[rusty ol ranger]

The thermactor plugs for the back of the heads on a Windsor motor are 5/8-11. They are not pipe thread.
The caddy probably used the spider looking manifolds and pumped air in at every exhaust port. That style used inverted flare like the end of a brake line.

Yeah these plugs are 5/8 with a course thread...so id assume they are 11.

Inverted flare is a brake line flare? I thought there was only single and double flares.

My 460 had the AIR in the manifold

 

[snoranger]

Yeah these plugs are 5/8 with a course thread...so id assume they are 11.

Inverted flare is a brake line flare? I thought there was only single and double flares.

My 460 had the AIR in the manifold

Single and double ARE inverted flares. The single and double only refer to the flares wall.

 

[rusty ol ranger]

Single and double ARE inverted flares. The single and double only refer to the flares wall.

Well guess i learned a new term lol

 

[19Walt93]

Be careful if you use a tap to clean the threads or you could cut them too much. It's better to use a thread chaser. I've used real short 5/8 bolts with copper washers under them to plug those ports in the past.

 

[rusty ol ranger]

Be careful if you use a tap to clean the threads or you could cut them too much. It's better to use a thread chaser. I've used real short 5/8 bolts with copper washers under them to plug those ports in the past.

Im going to use some carb cleaner and a stiff brush to try and get the carbon out before i go playing with anythjbg else

 

[19Walt93]

If you use a tap just turn it with you fingers or go very easy with a tap handle. Carb cleaner won't do much on heavy carbon.

 

[bilbo]

Oven cleaner cuts carbon well, but be careful it’s soda lye. It wont hurt cast iron as long as you don’t leave it on there forever, but it readily damages aluminum. If you use it be careful and wear ppe as it readily dissolves your skin and turns fats contained therein into soap.

 

[snoranger]

be careful and wear ppe as it readily dissolves your skin and turns fats contained therein into soap.

Are you calling him fat?!?!

 

[rusty ol ranger]

Oven cleaner cuts carbon well, but be careful it’s soda lye. It wont hurt cast iron as long as you don’t leave it on there forever, but it readily damages aluminum. If you use it be careful and wear ppe as it readily dissolves your skin and turns fats contained therein into soap.

Its an 85 351...no aluminum anywhere lol.

I didnt think about oven cleaner.

What about gun cleaner and a wire wheel on a rotary tool?

 

[pjtoledo]

flammable fluid and friction/heat/sparks. "it's been nice knowing 'ya"

got a pick? gouge the threads out some. no pick? make one with a bent nail.
any 5/8 bolts laying around?? file them down a bit for the first "cut" to work some crap out.
with the holes probably being shallow, a bottom tap might be best but I'd start with a thread chaser.