Topic: 21 stud head gaskets


lazy69ranch    -- 12-15-2014 @ 12:38 PM
  Hi guys, I'm preparing to replace my heads a 1935 21 stud I have some questions...One of the original aluminum heads has cracked.

I've had the replacement iron heads resurfaced. They have the trapezoidal ports.

Q-1. I can't seem to find Fel-Pro or Victor composite head gaskets. Can you help me source these or tell me if the Korbestos are as good?

Q-2. Assuming the head studs are original, should I replace or re-seal them regardless of their appearance?

Q-3. What's the best thread sealant for head studs?

Q-4. I recall an EFV8 tech tip coiling a rope through the spark plug hole and into the cylinder and bumping the starter to pop the head loose. Can anyone support this technique or provide another should the heads not want to pop off readliy?

Q-5. I understand that the newer composite head gaskets do not require sealant or lube for installation. Does that sound correct?

I'm aware of the torque sequence and ft lb specs. If you have other suggestions that may be helpful for this job please let me hear it and thanks in advance for the help. I'm a little concerned about removing the studs without breaking them off in the block. Planned to soak them in Penetrating Blaster for a few days.

Dan


dansford    -- 12-15-2014 @ 1:54 PM
  Try Summit Raceing or JEGS for the head gaskets.dansford


40 Coupe    -- 12-16-2014 @ 4:13 AM
  Q1 Fords are good. contact Southside Obsolete
Q2 If the studs are original and of the correct length and do not leak there is no need to pull each and reseal, the upper threads must be good check each to make sure a new nut fits all the way down by hand.
Q3 Peramtex #1 is Hard set and #2 is soft set #1 will harden like a rock which is not that bad on a head stud that you want to stay in place. NOTHING on the upper threads not even oil.
Q4 try loosen all the nuts and with throttle and choke open, turn engine over with starter... add oil to every stud, then use a head remover. there are many different styles. They usually use the spark plug holes to pull against the studs.
Q4 Snap-On has a good stud puller it can rotate the stud from the bottom near the threads in the block.
GOOD LUCK and take your time.


JM    -- 12-16-2014 @ 4:46 PM
  1. Best Gasket Company makes a very high quality gasket set for 21 stud FH engines that includes composet head gaskets. These head gaskets can also be purchased separately. Google is your friend for finding their website.
2. If the original studs are in good condition I would recommend not trying to replace them. These studs snap off at deck surface quite easily...don't ask me how I know.
3. If you do have to seal studs going into the water jacket, I would recommend a non hardening sealer like Permatex 2 or Aviation Permatex.
4. I have heard the rope method works, but never tried. Loosening each nut a few turns and starting the engine also works.
5. I do not use sealant on Best Head Gaskets but a thin coat of grease on both sides may make them easier to remove if that becomes necessary.
6. Torque and re-torque a couple times per procedures recommended by the gasket manufacturing company.

John


1934 Ford    -- 10-26-2015 @ 3:34 PM
  By now you are fixed, but for others, try this approach to get your heads off.
#1 Take an old spark plug and break to porcelain tip off and cut the spark tip off. Then knock the porcelain and the electrode out of the plug.
If you can, attach it to your slap hammer, then skip to instruction #4. If not read 2, 3, 4.
#2 Run a threaded rod through the plug, and put lock nuts above an below the body off your old spark plug. You should round off the corners of the lock not that goes in the spark plug hole.
#3 Put the hand weight from your slap hammer on the threaded rod with a washer and a nut on the top.
4. Screw the spark plug body into your head, one hole at a time, and it will lift your head off when you slide the slap hammer against the top nut and washer.
Worked for me for 40 years, including today.

1934 Ford's since 1972

This message was edited by 1934 Ford on 10-27-15 @ 1:41 PM


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