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| | | Joined: Dec 2007 Posts: 45 Wrench Fetcher | | Wrench Fetcher Joined: Dec 2007 Posts: 45 | ive got a 1954 chevy 261 with the original pump i think. The problem is, is that when we got the pump, it didnt have a pulley, so we pulled one off of a random truck at the junk yard that looked similar.I think that its too small,and is causing cavitation which is causing my engine to overheat.I measured the pulley and it came out to be between 4.5 and 5 inches wide.heres some pics.tell me what you think.Do i need to find a different pulley?Is there a place where i can order just a pulley that is the right size? Thanks http://i612.photobucket.com/albums/tt202/dantheman176/DSC04340.jpg
Last edited by Jim A; 09/07/2009 6:36 PM.
| | | | | Joined: Apr 2009 Posts: 431 Shop Shark | | Shop Shark Joined: Apr 2009 Posts: 431 | would a fan blade help? <;-o
how about a shroud on the radiator?
my '50's 216's is only a tad over 4", but my '56-'61's 235's is 7". and the pics i see for the 235s-261s have pulleys that appear to be closer to the 1 to 1 ratio with the crank pulley | | | | | Joined: Jan 2005 Posts: 1,602 Shop Shark | | Shop Shark Joined: Jan 2005 Posts: 1,602 | The pump you have looks like it needs the 7" pulley. The earlier pumps use about a 4.25" pulley but the later uses a 7" version. Just to make sure I have to ask: Does your current pump have round fins that sit "inside" the block? It loks like a round circle and there is a matching big round hole on the front of the block. The old version doesn't have a big hole as the pump mounts on the outside front of the block. Look at this picture: water pumps The pump on the left is the later version and looks like yours.
Last edited by Virginiafiretruck; 09/07/2009 9:07 PM. Reason: added link
| | | | | Joined: Apr 2009 Posts: 431 Shop Shark | | Shop Shark Joined: Apr 2009 Posts: 431 | how in the heck would one fit for the other when the bolt holes don't match? | | | | | Joined: Jan 2005 Posts: 1,602 Shop Shark | | Shop Shark Joined: Jan 2005 Posts: 1,602 | An "Relocation Adapter" plate is used with the one in the right side of the photo link.
| | | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | That's a later 261, at least a '58 judging by the oil filter and lines. They pulley you have is for a 216. Check the salvage yards, should be able to find a correct pulley for it. If you don't have one, you may want to grab the fan, too. I would suggest looking at school busses, the later ones have a 5 blade fan that is much better than the 4 blade. You'll want to consider adding a shroud, too, for best efficiency.
Bill Burmeister
| | | | | Joined: Dec 2007 Posts: 45 Wrench Fetcher | | Wrench Fetcher Joined: Dec 2007 Posts: 45 | the reason i dont have a fan on the pulley is because i cant fit one.Im using an electric pusher.which engine can i get a 7 in pulley off of.this pump is the one with the impeller on the inside of the block.ill do some research and see where i can get a pulley that will match up with my pump.any suggestions?Thanks | | | | | Joined: Apr 2009 Posts: 431 Shop Shark | | Shop Shark Joined: Apr 2009 Posts: 431 | an elec pusher? as in when your going down the highway with the wind blowing in the radiator, the pusher is blowing it out? | | | | | Joined: May 2001 Posts: 7,438 Extreme Gabster | | Extreme Gabster Joined: May 2001 Posts: 7,438 | I know that a pulley off a 292 Ford from the '50s will work if you can find one.
I've seen several people at swap meets with a selection of pulleys. Take a paper template of your bolt pattern with you. | | | | | Joined: Jan 2008 Posts: 4,961 'Bolter | | 'Bolter Joined: Jan 2008 Posts: 4,961 | Looks like your water pump pulley is way too wide for the belt which will cause to slip. I think Cletis is right. I mess with GMC as well as Ford y blocks. I'm quite sure that a Y-block ford will work and they have about the same belt width as your alternator. It seems like you have a narrow pulley on your vibration damper too. Fans appear on eBay ever so often. A shroud will help a lot. We used to build them out of 14 gauge cut the size of the radiator to bolt on the radiator mounts. Then cut a hole about an inch larger than the fan diameter and then make a circle out if 1" flat and weld it to the edge of the hole. These old hot water sixes have to be kept cool or they will crack or warp heads. | | | | | Joined: Apr 2009 Posts: 431 Shop Shark | | Shop Shark Joined: Apr 2009 Posts: 431 | ah, the ol relo dapt. slow yer page turnin down, cuz i can't read that fast yet | | | | | Joined: Aug 2007 Posts: 1,859 Grumpy old guy playing with trucks, cars, and boats | | Grumpy old guy playing with trucks, cars, and boats Joined: Aug 2007 Posts: 1,859 | an electric fan wont move enough air. Find the right diameter fan pulley and install a real fan. Even a flex fan would work.
The problems we face today can not be addressed at the same level of intelligence we were at when we created them - Albert Einstein Or with the same level of $ - Me
| | | | | Joined: Apr 2009 Posts: 121 Wrench Fetcher | | Wrench Fetcher Joined: Apr 2009 Posts: 121 | is there a place where i can just order the right pulley by itself?
By the way,this is danny, the poster of this thread, just using my account now, not my dads account.dont get confused.anyways, now i heard that i might have the wrong radiator because i dont have room to fit a fan on the water pump pulley.im gunna research that tomorrow.all i want to do is get the pulley on the pump.i think we've established that its about a 7 in pulley?
Danny | | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 |
Danny,
It looks like you have a long-shaft water pump. The first thing you might be interested in doing is to identify the year f you engine. It is not a 1954 261.
The 55-2nd through 1963 235/261 water pump will not allow enough space for the fan to be mounted; and, the location of the 55-63 fan is not ideal.
The relocation adapter-plate (mentioned above by Virginiafiretruck" will allow a 1955-1st or earlier water pump to be used. This will (1) put the fan in the correct location, (2) the older pump will have the correct pully size, and (3) you would be able to choose a pump that has a pulley with the correct groove=width to match the grooves in your harmonic balancer's and alternator's pulleys.
If you just want to change your pulley, maybe someone will post information on where to find a pulley, and how to remove the existing pulley, and how to press on the "new" pulley in the correct location, and how to trim the excess material off the pulley-post.
Tim
| | | | | Joined: May 2001 Posts: 7,438 Extreme Gabster | | Extreme Gabster Joined: May 2001 Posts: 7,438 | It appears to me that the shaft has already been shortened and the earlier pulley installed. He just needs the bigger pulley to make it work.
Danny, if you can't easily find a pulley I'd recommend the adapter plate and old style water pump rather than buying an after market pulley from a specialty supplier. I'm sure it would be nearly as expensive as the adapter. | | |
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