I was putting my dual carbs onto my motor today and had a quick question. Does the rubber insulator have to be on the heads that go in between the heads and intake? I was given a new gasket for the intake to head and was wondering do i just use this one thin gasket or leave the thick insulator in between? The reason i ask is because the intakes have thick flanges and with the insulator theres barely any thread to put the bolts back on, i can't even get the washers onto the bolts, there just isn't enough thread with the insulators on there. Thanks

No thick gaskets for the carbs. They need some heat and don't work as well when cold.

I dis-agree ...

Use the thick FI gaskets. They will insulate the runners from the heads and help prevent the fuel from boiling in the bowls after a spirited drive.

Seen it many times. You park the car after a nice drive and then it won't start. Vapor lock because of the heat soak from the heads.

You might need longer studs to get enough thread on the nuts.
Andy

So the thin gasket won't be enough, i need the thicker one. Is there anyway to make the intake runner flange thinner, grinding or something to get more threads? If not, how do i get longer studs and how do you get the studs out?

You don't *need* them. It'll run fine with the paper gaskets, provided you can get them to seal right. The flanges better be perfect ...

However, in my experience, the thicker gaskets are beneficial.

Longer studs are plentiful at your local hardware store. Removal is easy with the good old double-nut trick. You might have to get two relatively thin nuts, depending on how much thread is sticking out of the head.
Andy

Here's a pic of longer studs installed. Those heads came off my 2056 ...

Andy

Are the studs just a reverse thread? and the double nut trick will make it so i can twist them out. is that right?

Huh?

Nope, no reverse thread. Just plain ole studs.
Double nutting (is that a word? ) will effectively give you a temporary "head" you can put a wrench on and remove the old stud.

You use the same method to insert the new studs ...
Andy

Tighten the two bolts together( against each other) as tightly as possible, then if you can, I try to get a wrench on the bottom one, if not, a socket on the top should work if the bolts don't seperate first.

Really? the studs are just a press fit in. Then why don't they pull out when i put the intakes on and put the nuts on, with enough force wouldn't they just back out?

Threaded into heads

Steve

if you are trying to use steel cut lock washers under the nuts try schnoor washers. the same ones used on the cvjoint bolts. they're thin and you'll prob be able to get the nuts on. compressing the cut washers is way more torque than you need to effectively seal the intake gaskets and if torqued in a weird sequense you may build in a vaccume leak. if your linkage is setup for use of the phenolic (plastic) FI intake gaskets you will need to adj it.

Press fit?
No, the heads have threaded holes for the studs ...



Don't tell me you never double nutted a stud!

Sorry, but that just doesn't sound right ...
Andy