pullys

[ketters55]

Hey guys i'd like to thank you all in advance for all the tips......you have answerd all my past questions......this is the best site ever.

My question this time is on water pump pullys i'm looking for the deepest pully for my 409...the pully must almost touch the water pump.... to line up with the 2 grove crank pully. I have a rusted one but it has rust pits and looks like @#$% after i bead plasted it............any one have one for sale out there????? I'm trying to line it up with the inside grove on the crank pully.

Thanks Again!!!!!!!
ketters 55

 

[dunhamfield]

1st off, do you have a short or long water pump? The long one was only used on 64 & 65 409's,,,,I believe.
2nd, do you want a single or double groove pulley?
I have a brand new in the box single groove pulley for a short water pump.
Would have to go look for part #... If you are interested I will go look....

 

[Impalaguru]

I went and grabbed my pulleys. The crank pulley is #3766987 (dual, deep groove) Waterpump outter is 3724816. Also a deep groove pulley. I don't see any numbers on the inner pulley. These are the factory pulleys off my 63 409.

I am wondering if you have a large bearing pump, like Dunhamfield said. Does it have any casting numbers? Is it a 3850145? If it doesn't have any #s and its a large bearing pump its probably an old western auto pump. You can try and press the flange back a little. Otherwise you'll either have to find a 64/65 pulley (very tough to find!) or you could get a 63 and earlier water pump. There might be an aftermarket pulley that would work Best of luck!

Ross

 

[Fathead Racing]

More hot air from Fatride.

Ross, don't be afraid to reach for a can of body filler to make that pully look like new! Body filler and two good coats of high build sanding primer will do wonders for that old pitted pully.

 

[Rockfish39]

.... Otherwise you'll either have to find a 64/65 pulley (very tough to find!) or you could get a 63 and earlier water pump. There might be an aftermarket pulley that would work...

Ross is right, going with an earlier water pump may be your best bet because a wide variety of SBC pulleys will work with it. AND the 3850141 pulley is NOT easy to find, nor would a good one be cheap even if you do find one.

Rock

 

[stew]

Water pump ID

Hello, I,ve been trying to find a pulley to fit my waterpump too. Mine has a bigger bolt pattern than the small block pulley, I presume this is what you call the big bearing pump? It,s a GM pump with what looks like the casting #s of 3757244??? Date coded B1462 Hope you can help . Thanks for now . Stew

 

[JimKwiatkowski]

3757244

Stew,you have a 1959 truck with a 348.

Year Part number Special Notes
1958 3732748 Passenger without bypass tube
1958 3732750 Passenger with bypass tube
1958-59 3738213 Truck 10 series with bypass tube
1958 3750760 Truck 9 series without bypass tube
1959-60 3755787 Passenger with bypass tube
1961 3765787 Passenger with bypass tube
1959-60 3755797 Passenger with bypass tube
1958-61 3755792 Passenger
1959 3757241 Truck 7 & 9 series with bypass tube
1959 3757244 Truck 8 & 10 series without bypass tube
1958-64 3774213 Passenger first design except Z-11
1960-61 3783957 Truck 70 & 80 series manual transmission
1961-63 3788878 Truck heavy duty automatic transmission
1962-63 3788878 Truck with one 3/4" outlet
1964-65 3839441 Truck heavy duty automatic transmission
1964-65 3857853 Passenger second design

All 348 water pumps are small bearing, short style.

 

[dunhamfield]

I bought a chrome waterpump & crankshaft pulley from truckshop and they said that they would not work on a 409, only older small block chevys.
The waterpump pulley bolted right up and measures identical to the stock 409 pully with th exception that the nose was a little larger in diameter but the same bolt pattern.
The crank pulley required drilling the extra holes to clear the rivits then bolted up just fine..........everything aligns well, its chrome and I didnt pay an arm and a leg for them

 

[Rockfish39]

What does your magic book say about....

Stew,you have a 1959 truck with a 348.

Year Part number Special Notes
1958 3732748 Passenger without bypass tube
1958 3732750 Passenger with bypass tube
1958-59 3738213 Truck 10 series with bypass tube
1958 3750760 Truck 9 series without bypass tube
1959-60 3755787 Passenger with bypass tube
1961 3765787 Passenger with bypass tube
1959-60 3755797 Passenger with bypass tube
1958-61 3755792 Passenger
1959 3757241 Truck 7 & 9 series with bypass tube
1959 3757244 Truck 8 & 10 series without bypass tube
1958-64 3774213 Passenger first design except Z-11
1960-61 3783957 Truck 70 & 80 series manual transmission
1961-63 3788878 Truck heavy duty automatic transmission
1962-63 3788878 Truck with one 3/4" outlet
1964-65 3839441 Truck heavy duty automatic transmission
1964-65 3857853 Passenger second design

All 348 water pumps are small bearing, short style.

Hey Jimi,
What does the magic book say a 3850145 pump is ???
Im curious

Rock

 

[JimKwiatkowski]

Rock,these part # come from our site,do you know what the part # is for a deep groove water pump pulley for a 63 is?

Year Part number Special Notes
1962-1964 3732748 Passenger
1961-1964 3732750 Passenger
1961-1964 3755787* Passenger with bypass tube-early models
1961-1964 3774213 Passenger first design except Z-11
1962-63 3788878 Truck with one 3/4" outlet
1963 3837691* Z-11 only (aluminum)
1964-1965 3850145** Passenger (late 64)
1964-1965 3857853 Passenger second design

*Small bearing, short water pump.
**Large bearing, long water pump.

 

[Rockfish39]

I truly dont know

Sorry Jimi
But I haven't the foggiest idea...




Rock

 

[mpris]

Jim, are you wanting a single or double groove part #. I have a 64 with double grooves and it's the same as a Corvette or Z28. The part # is 3770245 and is still available from Chrevrolet.

Poocho

 

[JimKwiatkowski]

Poocho,I'm trying to idenfy my deep groove pullys to see if I have an orginal set for a 63.I also want to see if there worth any $$$,Show Cars wants $90 for rear and $60 for the front water pump pullys.I also have a crank deep groove and Show Cars don't have any for sale,I might sell these pullys on ebay.my water pump pullys are 3724816 and my crank pully is 3921923

 

[stew]

Jim, Thanks for the ID on the 1958 "348" truck waterpump. I read somewhere that you could interchange small block waterpump internal parts into the 348 housing. ?? Then I would be able to use a regular small block pulley? Thanks again . Stew

 

[mpris]

Jim, you can still buy the 3921923 from GM for about $40.00. I saw it is used for 68-70's Camaros with a Big Block engine. The 816 pulley is the outer pulley for the two piece water pump pulley on 61-63 409's. (I think) If you have an assembly manual for a 63, it may show the pulley part numbers which came with the engine. I know the 64 manual shows them.

Poocho

 

[FastandFuriousFred]

Hi ! I came across awater pump and double row pulley at a car show and it sounds almost like what you are looking for. I just need to I.D. the no.stamped on the pulley - 3739298. Is this identifiable by anyone? I can measure the overall depth or ht of the pump and pulley depth. It also has the large bearing (2") No no. on pump for casting Thanks