63 L84 fan clutch pics

[Michael G.]

Can someone please post a few pictures of a correct fan clutch for a 63 FI engine?

Thanks

[Jack H.]

Re: 63 L84 fan clutch pics

Same as non-FI cars. There were two suppliers (Eaton and Schwitzer). You'll find pix of both in the archives as they were the same for all mid-year cars and the description in the JG text isn't that bad...

[Michael G.]

Re: 63 L84 fan clutch pics

Jack, I have correct, working Schwitzer. What I'm wondering about is the printing I've seen on the "bar" on the face, on some cars, and the green paint spray "spot" I've seen on fins of the some other cars. Are these supposed to be present on mine?

Thanks,

[Jim B.]

Re: 63 L84 fan clutch pics

Here's an example of the coil-type element clutch for a Feb. '63 car, restored by Mr. Oliva...

[Wayne M.]

Re: 63 L84 fan clutch pics

.... Schwitzer. What I'm wondering about is the printing I've seen on the "bar" on the face, on some cars, and the green paint spray "spot" I've seen on fins of the some other cars. Are these supposed to be present on mine? ......

Michael -- here's the front of an original Schwietzer; happens to be a CJ for small blocks. These have straight radial fins on the backside, not slightly curved as one sees on the Eaton type.

second pic shows whiff of green spray paint on the edge of the curved fins of a recent service EATON type (with the angled [ie. non square] fluid reservoir (?)] This is a CK clutch, which means it's the wrong one for this small block '65 air car .

Third pic shows two EATON first design (?) types with square reservoirs.

Can't say what was TFP for '63's

[Jack H.]

Re: 63 L84 fan clutch pics

The printing on the Schwitzer ('This Side Up') was there from day one to my knowledge.

On the green paint, that's a 'fuzzy' item in my book. I've heard some say these marks were associated with service replacement parts and not there on the factory original clutch. But, that could well be an old wife's tale...

I do know that as we get into the C3 era we begin to see paint marks mentioned in the AIM (balancing?) that show up on both the fan clutch hub and on the water pump hub (circa '71-72)...

[Michael G.]

Re: 63 L84 fan clutch pics

Thanks guys, that was very helpful.

[Alan D.]

Re: 63 L84 fan clutch pics

Jack/Wayne - When searching articles it appears that the CJ ink mark was not added till 6-15-66 Now since the CJ vs CK is supposed to be small vs BB (I think?) and 63/64 did not have a BB did these early fans have those markings?

[Jack H.]

Re: 63 L84 fan clutch pics

There's another detail, I know I don't know. Fred Oliva DID get his hands on the fan clutch drawings from both Schwitzer and Eaton as a part of his restoration business. Plus, he contributed descriptive text to many of the existing JG books.

I note the text in the current release of the '63-64 JG book describes the Schwitzer and Eaton clutches separately and both the 'This Side Up' and 'CJ' ink stamps are called out while there's no mention of the green paint daubs...

[Wayne M.]

Re: 63 L84 fan clutch pics

Jack/Wayne - When searching articles it appears that the CJ ink mark was not added till 6-15-66 Now since the CJ vs CK is supposed to be small vs BB (I think?) and 63/64 did not have a BB did these early fans have those markings?

What you say about markings may be correct. Out of the six clutch assy's I have, 2 are Schweitzer, and the one with the 1968 date code on the flange edge has the remains of the 'CJ' stamp [pic above]. The other, which was donated by someone resto-rodding a '64 and a '65, has no flange date stamp and no ink stamp coding (but was so dirty that anything would have disappeared with solvent cleaning ).

Also, I notice in the P&A30 books, the reference to a CK code (and CT -- not a Corvette) first appears about 1968. Still no 'CJ' descriptive reference by Jan 1970.

I wonder if the bi-metallic strip (ie. Schweitzer) clutch designs were ever available in service ?