332-428 Ford FE Engine Forum-Intake Manifold Torque Specs (2023)

Can anyone tell me if the torque specs for an aluminum intake manifold are different than for a cast iron manifold, and if they are, what are they? Thanks.

Bill Haegele
FGCoA, #4246
1964 Ford Galaxie 500 Convertible
390ci w/4-bbl and 3-Spd w/Overdrive
"A work in progress"

Can anyone tell me if the torque specs for an aluminum intake manifold are different than for a cast iron manifold, and if they are, what are they? Thanks.

Bill Haegele
FGCoA, #4246
1964 Ford Galaxie 500 Convertible
390ci w/4-bbl and 3-Spd w/Overdrive
"A work in progress"

.

Mickey Thompson's 63 1/2 AFX Hi-Rise 427 Lgt/Wgt Galaxie
1957 C-600 Cab-over carhauler w/390-4V, 2-speed rear-end

Just my opinon.

65 LTD 2 DR 390 Crusio soon 428/C-6
62 F100 Areostar clip 390 C-6 soon
66 Merc S-55 2 DR 428 C-6
66 Fairlane 2 DR Post Sedan future race W/428- C-6

Can anyone tell me if the torque specs for an aluminum intake manifold are different than for a cast iron manifold, and if they are, what are they? Thanks.

Bill Haegele
FGCoA, #4246
1964 Ford Galaxie 500 Convertible
390ci w/4-bbl and 3-Spd w/Overdrive
"A work in progress"

. . . between iron and aluminum intakes, spec was 32-35#-ft. The GT-40 spec, aluminum intake into aluminum heads, is also given as 32-35#-ft.

E'Brock specs 25#-ft for the RPM intake, I always presumed this was because the bolts were threaded into their alum heads, they don't use inserts for the intake bolts.

One of our Forum members torqued his Blue Thunder PI intake to 35#-ft and cracked a boss. I believe he said he used flatwashers, this is crucial with alum intakes, but he still had a failure. I don't know what BT's spec is, Rob McQ., if you're reading this, please elucidate.

The Sidewinder that Rod sold me looks pretty fragile, it had a cracked boss I had repaired, Ford's was pretty stingy with their aluminum in these castings, this is probably why they weigh so little compared with the E'Brock or BT

I'll use flatwashers and torque to 25#-ft, same as my old RPM, I never had a leak, and, knock wood, never cracked a boss. JMHO.

-MB-

Can anyone tell me if the torque specs for an aluminum intake manifold are different than for a cast iron manifold, and if they are, what are they? Thanks.

Bill Haegele
FGCoA, #4246
1964 Ford Galaxie 500 Convertible
390ci w/4-bbl and 3-Spd w/Overdrive
"A work in progress"

But I always test fit - mockup - the aluminum manifolds so make sure the faces of the heads and manifolds are parallel. And I always use a grade five washer under the bolt head.

Never had any monfolds break - knock on wood.

Bob

1966 7 Litre Convertible
1959 F-100 (under construction)
2005 GT40 (in my Dreams)

. . . between iron and aluminum intakes, spec was 32-35#-ft. The GT-40 spec, aluminum intake into aluminum heads, is also given as 32-35#-ft.

E'Brock specs 25#-ft for the RPM intake, I always presumed this was because the bolts were threaded into their alum heads, they don't use inserts for the intake bolts.

One of our Forum members torqued his Blue Thunder PI intake to 35#-ft and cracked a boss. I believe he said he used flatwashers, this is crucial with alum intakes, but he still had a failure. I don't know what BT's spec is, Rob McQ., if you're reading this, please elucidate.

The Sidewinder that Rod sold me looks pretty fragile, it had a cracked boss I had repaired, Ford's was pretty stingy with their aluminum in these castings, this is probably why they weigh so little compared with the E'Brock or BT

I'll use flatwashers and torque to 25#-ft, same as my old RPM, I never had a leak, and, knock wood, never cracked a boss. JMHO.

-MB-

.

Mickey Thompson's 63 1/2 AFX Hi-Rise 427 Lgt/Wgt Galaxie
1957 C-600 Cab-over carhauler w/390-4V, 2-speed rear-end

. . . it's not there now.

-MB-

......at the bottom of this page (soon to be next page, LOL)? I finally figured this photo-posting out. Took a half a day, once I organized my files (that was the other half a day,LOL), Rod

Mickey Thompson's 63 1/2 AFX Hi-Rise 427 Lgt/Wgt Galaxie
1957 C-600 Cab-over carhauler w/390-4V, 2-speed rear-end

The pic on the COE is truly baaaad.

-MB-

Just my opinon.

65 LTD 2 DR 390 Crusio soon 428/C-6
62 F100 Areostar clip 390 C-6 soon
66 Merc S-55 2 DR 428 C-6
66 Fairlane 2 DR Post Sedan future race W/428- C-6

Well, Thanks everyone. I was able to dig out my service manual (64 Gal) when I got home from work tonight and found the torque specs listed:

352/390 = 32 to 35 ft-lbs (this would be cast iron)

427 = 25 to 28 ft-lbs (this would be aluminum)

Bill Haegele
FGCoA, #4246
1964 Ford Galaxie 500 Convertible
390ci w/4-bbl and 3-Spd w/Overdrive
"A work in progress"

The pic on the COE is truly baaaad.

-MB-

.....my old scrapbook with the picture of the first car the intake was in, a G-code notch-back that was silverish-blue. It had the same wheels and Hi-Riser hood as the white notch-back 390 tow car, Rod.

BTW, what does COE stand for?

Mickey Thompson's 63 1/2 AFX Hi-Rise 427 Lgt/Wgt Galaxie
1957 C-600 Cab-over carhauler w/390-4V, 2-speed rear-end