The inside radius on the factory fan shroud matches the radius of the curved tips on a 772 blade.
Factory 7 blade chevy radiator fan.
I believe oem blades number either 5 and 7 blades for each fan or 7 and 9 blades.
And a thermal fan clutch.
My 318 will barely say under 215 in traffic with the factory hd cooling system new glen ray 26 radiator fan clutch 7 blade fan and new motor.
Cars with ac or k02 received the same fans as the 1969 z28 and l78 copo cars.
Each blade replicates the original fo an authentic appearance and fit.
I can and have put 10 000 pounds of trailer on it plus another thousand in the bed and run it straight up a mountain and never touch 200 degrees.
I am about to prove if a nos pump solves my problem since the gmb after crap market pump died in the first 5 months.
One with 7 to 9 blades.
There were two manufacturers of this fan and a mid year fan pitch change 2 to 2 25 yielding four variants of this fan.
Get a real fan.
The gm part number is 3999260 it is a 19 5 inch 7 blade fan.
By accident i figured it out.
In 1969 the clutched fan changed to a seven blade design still 18 inches in diameter with aluminum fan blades.
New oem gm engine cooling fan clutch blade 15644302 chevy gmc v6 v8 1984 1996.
After i sawed a small hole in my factory 1970 plastic fan shroud on my driver using a non 772 blade.
A factory plastic fan shroud and the 772 blade are designed to be used together.
The simple answer is.
A correct oer authorized reproduction of the original style radiator fan blade which was installed as original equipment on various gm models with 18 diameter 7 blade fan.
Cooling is all about.
Only 4 left in stock.
You can not run the ac in 110f days in arizona in traffic.
94509632 radiator cooling fan assembly new oem gm 2012 17 chevy sonic 1 8l fits.
I was having overheating problems and went through the cooling system.
My radiator had a small leak but was very rusty.
Alloyworks 4 row aluminum radiator shroud fan relay for 1932 ford hot rod chevy 350 v8 engine pro us.
Allstar all30100 18 diameter 5 8 pilot hole steel mechanical type radiator fan with 6 blade.
Point of reference my 454 3 4 ton truck uses a mechanical fan.
4 8 out of 5 stars 21.
These don t have the oem blade count to my understanding however i haven t had a cooling problem.