1968 Correct 7 blade fan and clutch fan

[Jeff P.]

I just stripped the 7 blade fan on my L79 ,350 HP,AC Vert. The part number and date C72 would make me believe this is a 1972 March build fan . The clutch fan fits into my June build but would anyone have the correct part numbers for these two items. Thank you in advance. A great hobby, just when you think everything is correct you have a setback. I keep smiling.

[Jeff P.]

Re: 1968 Correct 7 blade fan and clutch fan

Diving in to a lot of threads, I've come to the conclusion that part#. 3888366 is the correct fan for a 68 L79 small block with AC. 5 blades with 5 flat rivets per blade .Now for the markings. H, 66 , front. Would be the only markings. No dates ? Fan clutch would be part # 3916141. CK. With a short water pump. Is there a part number for this water pump. Thanks, Jeff

[Joe L.]

Re: 1968 Correct 7 blade fan and clutch fan

Diving in to a lot of threads, I've come to the conclusion that part#. 3888366 is the correct fan for a 68 L79 small block with AC. 5 blades with 5 flat rivets per blade .Now for the markings. H, 66 , front. Would be the only markings. No dates ? Fan clutch would be part # 3916141. CK. With a short water pump. Is there a part number for this water pump. Thanks, Jeff

Jeff------


The 5 blade GM #3888366 is the correct fan blade assembly. No 7 blade fans used for 1968. No part number or date code found on the 3888366. Original fan clutch was GM #3937771.

The waterpump assembly part number would do you no good now. However, it was a GM CASTING # 3782608.

[Jeff P.]

Re: 1968 Correct 7 blade fan and clutch fan

Many thanks, Joe. Water pump is correct . I imagine a previous owner changed the 5 blade to a seven.

[Jeff P.]

Re: 1968 Correct 7 blade fan and clutch fan

Joe,I see that some rivets are raised and some are flat. Was there a difference in 68.

[Gary B.]

Re: 1968 Correct 7 blade fan and clutch fan

Don't know if this helps or not, but out of an early 69, C02 build date. 10,900 miles, 350 HP with A/C.
Gary B

DSCN4955.jpgDSCN4958.jpgDSCN4960.jpgDSCN4959.jpg

[Joe L.]

Re: 1968 Correct 7 blade fan and clutch fan

Joe,I see that some rivets are raised and some are flat. Was there a difference in 68.

Jeff------


Rivets seen in Gary B's post are correct for 1968. Also, the fan clutch seen is the correct one for your 68. However, very early 1968 small block with A/C may have used the GM #3916139 fan clutch.

[Jeff P.]

Re: 1968 Correct 7 blade fan and clutch fan

Thank you Gary and Joe. Great pictures.

[Jeff P.]

Re: 1968 Correct 7 blade fan and clutch fan

Joe, would there be any markings on a 68 fan such as the word front or a letter?

[Joe L.]

Re: 1968 Correct 7 blade fan and clutch fan

Joe, would there be any markings on a 68 fan such as the word front or a letter?

Jeff-------



It will have an "H" and a "66" stamped on the center section. If it has that, it's right. If it doesn't, it's not.

[Jeff P.]

Re: 1968 Correct 7 blade fan and clutch fan

Thank you Joe.