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Fel-Pro 1250 intake gasket set

OP
OP
blubuckaroo

blubuckaroo

Grease Monkey
Joined
Jun 11, 2007
Messages
11,795
Loc.
Ridgefield WA
You need to use either the blocked or ported insert. You can't leave it out because the material, that the main part of the gasket is made of, won't handle the heat of the exhaust port. However I believe the set I got was flawed. The inserts were thicker and harder than the main part of the gasket. I believe this kept the rest of the gasket from sealing properly causing the gasket to be able to crawl around. I'd measure the thickness of both pieces first. Fel-Pro has lost some quality since being taken over by Federal Mogul.
 

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tasker

Contributor
all knowing of nothing
Joined
Jun 2, 2006
Messages
21,118
Loc.
NH
will do tonight. Thanks for the info, really don't want to do twice
 

72Sport

Bronco Guru
Joined
Jul 8, 2002
Messages
2,954
You need to use either the blocked or ported insert. You can't leave it out because the material, that the main part of the gasket is made of, won't handle the heat of the exhaust port. However I believe the set I got was flawed. The inserts were thicker and harder than the main part of the gasket. I believe this kept the rest of the gasket from sealing properly causing the gasket to be able to crawl around. I'd measure the thickness of both pieces first. Fel-Pro has lost some quality since being taken over by Federal Mogul.

What happened to the Edelbrock recommendations as per your post I linked in my above post?

"Google Edelbrock:
• GASKETS: Do not use competition style intake gaskets for this street manifold. Due to material deterioration over time, internal leakage of
vacuum, oil, and coolant may occur.
INTAKE MANIFOLD RECOMMENDED GASKET
2121, 3721, 3723, 7121, 7521, 75213 Edelbrock #7220 Port: 1.20” x 2.00”, .060” Thickness

1) Use only recommended intake gaskets set when installing this intake manifold.
2) Fully clean the cylinder head intake flanges and the engine block end seal surfaces.
3) Apply Edelbrock Gasgacinch sealant P/N 9300 to both cylinder head flanges and to the cylinder head side of the gaskets,
allow to air dry, and attach the intake gaskets.
4) Do not use cork or rubber end seals. Use RTV silicone sealer instead. Apply a ¼" high bead across each block end seal
surface, overlapping the intake gasket at the four corners. This method will eliminate end seal slippage.
5) Install the intake manifold and hold-down bolts. Torque all of the manifold bolts in two steps by the sequence shown in
Figure 2 to 18-20 ft/lbs."

I used the 7220. So far no problems. Edelbrock recommended the 1250 set in their 2003 catalog but changed to the 7220 sometime in the recent past. My local speed shop said that Edelbrock changed to the 7220 because of to many problems with the 1250. I don't know whether that included the 1250s or not.
 

flousberg

Sr. Member
Joined
Apr 28, 2002
Messages
754
I am bringing this back. I replaced my 1250 a few years ago because I had a coolant leak in the front of the heads. Now, it is leaking again. Is the consensus to use the edelbrock gasket still? The first one lasted over 6 years, the last, less than two. It only leaks after the engine cools, not when it is running.
 

77BRONKOTN

Full Member
Joined
Sep 3, 2001
Messages
360
Mr gasket ultra seal is what I've always used. Never any problems.

ARP thread sealer on all bolts. Permatex ultra around the water and front/rear deck.

Edelbrock , weber , offy intakes.
 

flousberg

Sr. Member
Joined
Apr 28, 2002
Messages
754
Leaks out the front, runs down the front and collects int the timing cover.
 

Viperwolf1

Contributor
electron whisperer
Joined
Aug 23, 2007
Messages
24,346
I got away from the 1250's and tried the 1250S3's. After a couple years I have a similar leak, only when cold. I bought some edlebrock 7220's but haven't tried them yet.
 

flousberg

Sr. Member
Joined
Apr 28, 2002
Messages
754
It only leaks when cold. It is the damnest thing. Ran all day Saturday. No issues. Was fine yesterday morning. Pulled out of my driveway this morning and there was a spot under it. Opened the hood and the leak was back. It doesn't seem to go anywhere but out.
 

72Sport

Bronco Guru
Joined
Jul 8, 2002
Messages
2,954
A friend works on Sunbeam Tigers. I think they have a 289 but not sure. I told him about my problems with the 1250s. He said I just used the stock gaskets with the aluminum intake. He says he has never had a problem with leaks. %)

I haven't had any problems with the 7220s but the Bronco hasn't been driven much either.
 

casadejohnson

Bronco Alchemist
Joined
Jan 21, 2005
Messages
3,587
I may have this same leak at the front of the intake. It appears to be right at the spot where the engine block, head and intake manifold come together. I had an unexplained coolant leak that I could not locate after I dropped my engine back in. It leaked a few times then stopped. It had not leaked any more coolant until today. I could see it pooling up on the top of the timing cover. I cleaned it all up and ran it again to see if I could pinpoint the leak and now I get no leak. An intermittent coolant leak seems weird to me. I did find that the intake bolt directly above the leak was not torqued down to spec so I took care of that but that was after I cleaned it up and ran it again. I hope that takes care of it but if not, I will be looking for a new intake gasket.
 

hdfx81

Sr. Member
Joined
May 13, 2008
Messages
523
Have had this happen before, turned out to be the by-pass hose leaking at the water pump. Check your hose clamps on by-pass hose and upper rad hose.
 

robinsoncc

Jr. Member
Joined
Mar 31, 2007
Messages
195
That looks like torque split. Make sure when you torque the gasket is relatively dry. If you use a sealant make sure it setup.
 
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