[Jason Rogers]

I have a 67 FB 400, 4 speed, with A.I.R. What type of fan was on the car? Fixed or clutch? Number of blades?

[nashcar]

Mine has a flex-fan with five blades of stainless, 17" diameter as I remember.

[Jason Rogers]

Anyone, anyone, Bueller...

Come on guys, what fan cam on the 400's?

[Jason Rogers]

ttt

[Region Warrior]

Not sure about A.I.R., but 400-4spd used a 5 blade w/clutch. 19" dia., 2-5/16 pitch.
Next time i'm home(work'n 2 jobs), will check old Pontiac parts catalog for A.I.R.

[Region Warrior]

Forgot, all fans where 19" from factory.

[MikeNoun]

This may help: http://thefirstgensite.com/library/fans/fgffans.htm

[A Schab]

That chart has at least one mistake. The 69 manual trans with A/C uses the 5 blade power flex fan instead of the 7 blade clutch fan. I think that the same is true for 68 but I'm not positive.

[Region Warrior]

73 Pontiac parts catalog list.
Sorting through mess(way past do) for an earlier version think had a detailed chart.
Forgot to write down part #'s(was 3am after 2nd job), so get'm next nite or 2.
May not help anyway cause GM liked to change #'s every so often.

Clutch;

V8 with A/C exc A.I.R stamped PH
V8 with A/C and A.I.R stamped PG

Fans(all have 2-5/16" pitch);

V8 exc A/C-A.I.R.-HD(4 blade-19")
326 A.I.R. exc A/C(4 blade-19")
V8 HD exc A/C(5 blade-19")
Ram Air(4 blade-19")

[Jason Rogers]

I have determined that I had a clutch fan. Any idea if the fan itself is the same for fixed versus clutch?

['ol Pinion head]

Originally Posted by A Schab

That chart has at least one mistake. The 69 manual trans with A/C uses the 5 blade power flex fan instead of the 7 blade clutch fan. I think that the same is true for 68 but I'm not positive.

At least two mistakes, but I bet there are more... 480033 5 blade flex fans weren't used until mid '70. The previous 5 blade flex fans were the "346"s.

The party putting the tech info together is using a later edition parts book where part numbers have been superseded. Can't repeat enough times, quality info on correct parts used comes from disassembling & documenting actual cars, not leafing through (often later dated) master parts books.

['ol Pinion head]

Originally Posted by Jason Rogers

I have determined that I had a clutch fan. Any idea if the fan itself is the same for fixed versus clutch?

Don't believe one could get a regular 7 blade fan (with fixed steel blades) on an early Bird with without a fan clutch. The 7 blade power-flex fans I've pulled before came off overhead cam 6's.

[FunctionalShaker]

The assembly manual, dated 2/18/70 shows the 480033 and 480036 fans to be used optionally/interchangeably, though I've yet to see a 480036 fan.

['ol Pinion head]

Originally Posted by FunctionalShaker

The assembly manual, dated 2/18/70 shows the 480033 and 480036 fans to be used optionally/interchangeably, though I've yet to see a 480036 fan.

Have yet to run across a 480036, either. The 48xxxx lineage part numbers & casting numbers were not introduced until mid summer of '69. The 480033 fan was released for use on '70 Performance V8 Firebirds & also was used on at least mid year '70 Pontiac V8 performance A-bodys & GP's. It was used up through the '72 models. The 5 blade flex fan again changed part numbers (& design) for '73, & went to wider spread between two blades. Have several in the '73 & early calender year '74 range.

The '67 to early '70 usage 5 blade flex fan was speaking of earlier is a 9791346 / "346" for short. Have several mid to late '68 dated versions. Have also pulled quite a few more off '69 models & 70 models & the trend I've noticed is they typically predate '69 Pontiac A-bodys by 4 to 10 months. From what I've examined on original cars, they have not been not tight dated like alternators.

[FunctionalShaker]

I've noticed that date spread as well. We've covered these on other threads, but I'll mention that the 480033s were configured with either 4 or 3 rivets per blade. The early ones appear to use the 4 rivets.

[Jason Rogers]

My car is 3rd week of June 67', 400, 4-speed, with A.I.R. What fan and clutch part numbers do I need to make this thing correct?

[silverbullet07]

Here is my 346 dated J67. I think J is Sept. or should be since I was not used.

[Jason Rogers]

So that is a fixed fan and would have the aluminum "stand" behind it? Mine would not have been like that correct? I can't believe this is so difficult to find out this information.

[silverbullet07]

Correct, the clutch fan is completely different from what I've seen. I've heard about 7 and 5 blade but have not had to research them to know the difference.
Have you asked over on the FGF site?