Camaro Research Group Discussion > Originality
Single groove L34 water pump pulley
My68SS:
Hi all,
I've noticed pics on ebay of single groove water pump pulleys p/n 3905995, that have a slight ripple in the outer edge as per below pic, whereas others of the same p/n are smooth. ???
What normally appeared in Camaro's using this pulley, smooth or rippled?
big iron:
Rob,
Does the pulley have a CF on it?
Bob
My68SS:
Not sure about that particular one, but there are others on ebay that are quoted as being stamped 3905995 CF and have the exact same ripple edge.
I have one that is also stamped with the CF and is smooth.
big iron:
Rob,
According to a CRG report, pulley 3905995 has been found without the broadcast code (CF).
Note how the outer edge is so uneven. I have never seen a GM pulley formed with edges like the one you have shown.
I do not think that pulley is GM but Rich F or John H could give you a more knowledgeable answer.
Bob
My68SS:
Interesting, if you search 3905995 in ebay, you will find two auctions with this pulley claiming them to be nos. One is pictured with the GM box it came in.
Perhaps they are GM, but re-issues from another manufacturer who stamping process made them a bit differently?
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