My Percy's header gaskets just came in from Jegs. There are six individual metal gaskets. NO stitch welding on any. 4 holes per exhaust port. One hole (The inner center to each port) is about 1/16" from each exhaust port.

Will these work? Why 6 pieces? P/N660053

Do I use 3 pieces per side?

PS These for a 390 FE to be used with hedman headers.

 

tried to bring up p/n 660053 on jeg's website but it says no p/n found. Are you sure that's the right #?

 

No instructions? That number is 66053 for stock FE engines.

INSTALLATION INSTRUCTIONS
Exhaust Gaskets:

Scrape all old gasket material from each flange.
Use a large flat file to clean and flatten the header flange surfaces, removing any burs or welding imperfections.
Make sure the flange is substantially flat. Most headers are manufactured from very soft steel and can be re-flattened easily.
Inspect all threaded mounting holes in cylinder head to insure that they are clean and free of any corrosion or debris.
If using bolts, install bolt in head to insure that there is sufficient thread engagement and the fastener is the proper length. Replace fastener or add washers as needed to adjust.
Install gaskets and carefully tighten all header fasteners by hand. Start engine and listen for any leaks. Should leak be present, re-tighten fasteners until leak stops. Note: Be careful not to over tighten as this will warp header flanges. Use factory sequence and torques specification where applicable.
Re-torque Seal 4 Good gaskets 1 – 2 times after the engine has been at full operating temperature and then cooled. Periodically check fasteners for loosening. If the fasteners will not stay tight, there are a few options to try, in order to keep them from loosening:
Use Percy's Split-Lock bolts
Where Split-Lock bolts are not installed, use an appropriate sized lock washer


COMMON PROBLEMS AND SOLUTIONS
Problem: “My Exhaust Gaskets leak.”
Cause #1: The customer has not properly matched the gasket with the flanges i.e., they may put a round port gasket with a square port flange.
Cause #2: The customer’s header flanges are warped and should be straightened.
Cause #3: The fasteners have loosened and backed out. Refer to instructions for solution.
Cause #4: In rare cases, Seal-4-Good Exhaust Gaskets fail. It is typically due to one of the aforementioned cases.

SEAL-4-GOOD COMMONLY ASKED QUESTIONS

Q: “Which way do I install the Seal-4-Good Flange Gaskets?”
A: With the exception of the Big Block Ford Part #66035, all flange gaskets are installed with the smooth side out. There is a smooth rounded side and a sharp cut side, this sharp side goes on the head and the smooth side goes on the header flange.

Q: “Do you make Seal-4-Good gaskets for a different application other than listed in your catalog or on your site?"
A: We are always adding new applications, but at this time we offer only what is in our catalog and on our website.

Q: “What do I torque the fasteners to?”
A: Typical headers are somewhat low quality products. The flanges are made of mild steel that can bend easily. We do not recommend a specific torque for flange fasteners. Alternatively, we tell the user to hand tighten the fasteners in small increments until any leakage stops. This can prevent bending of the flanges, which will result in certain leakage. Again, refer to installation instructions for guidelines on how to keep the fasteners tight.

Q: “Can I port match Seal-4-Good gaskets?”
A: Yes. It is best to use a fine chiseling tool (punch) and a very hard wood to cut the gaskets. They can be ground but it must be done carefully and it does take some time.


As for having 6 individual gaskets per side, that is there claim, though I did believe that they were at least stuck together. I dunno.....

 

My Bad...P/N 66053

 

Found them p/n 680053 not 66. In the catalog it says 2 pieces. According to the illustration they would work. I don't get the six pieces, unless there are 2 individual port gaskets and one siamesed port.
As for the four bolts per cylinder, FE engines over the years had two different bolt paterns. The common 12 o'clock and 6 o'clock position (this should be what you have) and the less common offset pattern. These gaskets accomodate either patern.

 

Percy's header gaskets sealed up pretty tight for me when i used their split-lock header bolts with them, it's been a few years and they're still tight.

 

Yes, I have instructions. Nothing mentioned about 6 pieces. They do fit (stack) together though. I would guess 3 pieces per side. Is this right or did I get a bad batch?

Nothing in the instructions mentions several pieces, just "the gasket"...

With that being said, with a 1/16 piece of gasket between the port and one bolt hole for every port, how good will that seal? These are 30+ dollar gaskets.

 

Were your gaskets 1 piece per side? I have SIX whole gaskets in this pkg. Each one is thin aluminum. Each piece fit's the whole head.

 

I see the set you're talking about, they also have a FE Ford set with 680053. It says in the description for the 66053 that they are "layered" gaskets. Taking a wild guess you might have a bad set where the lamination didn't hold and they came apart, but I've never used these so I'm just guessing. Maybe Montana_highboy can enlighten the rest of us on how these work.

 

[QUOTE=mikeo0o0o0;7879440]I see the set you're talking about, they also have a FE Ford set with 680053. It says in the description for the 66053 that they are "layered" gaskets.

Thank you for replying. When I called Jegs, I asked for Percy's gaskets for a 390. They did not offer an option, just the 66053. Mayby someone here knows the difference between the two. I desire the better of the two for this price.

 

I bought the #66053 "dead soft" gaskets about 3yrs ago, they are multi-layered, they fit my FE, with a good set of headers there is no reason they shouldn't seal.

 

Jeesh Montana...Is your name Jason?...(my son's name). He answers questions like you, no details. Please read humer here. Did you have six seperate pieces and you used 3 per side? Or, were the layered pieces per side tack welded together? I have six seperate thin aluminum gaskets in one package. Common sense say's use 3 per side based on what I have recieved. I am looking for confirmation from someone that has used these multiple pieces before.

This is the advertisement from Jegs:
Percy's reusable flange gaskets are multi-layered and made of a special ''dead soft'' aluminum, which conforms to header flanges for an ultimate seal. Because the Seal-4-Good (TM) is a solid metal gasket, it will never blow-out nor will it ever burn-out. 2/pkg.

I have 6/pkg. All single pieces, not multi layered.

 

You have it right, that's the same way my gaskets came, i used 3 per side, they compress quite a bit when torqued down, in over 3 years i have yet to have one leak.