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| | | Joined: Jun 2017 Posts: 120 'Bolter | | 'Bolter Joined: Jun 2017 Posts: 120 | Hello, I have a newer water pump that I believe was installed in correctly by the previous owner or a mechanic which has a 5/8 pulley and not 3/8 which would correctly match the balancer and alternator. Is there a source of a 3/8 pulley somewhere or am I stuck buying a whole new water pump with the correct pulley. The pulley is the cast type BTW.
Thanks for the input.
I have a 54 235 1/2 ton chevy | | | | | Joined: Mar 2010 Posts: 10,272 Renaissance Man | | Renaissance Man Joined: Mar 2010 Posts: 10,272 | If you cannot find just the pulley, you can buy a new pump with the correct pulley, then put in on your engine, then mothball the old pump for when your new one eventually fails. At that time you can swap pulleys from your worn out "new" pump to your good old mothballed pump.
1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission
| | | | | Joined: Feb 2004 Posts: 29,771 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,771 | That 54 235 engine will have the high water pump like a 216- - - -the pulley is not removable unless you want to press it on and off.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Jun 2017 Posts: 120 'Bolter | | 'Bolter Joined: Jun 2017 Posts: 120 | One other question, Why does it say on some pulleys are not made for Hydramatic trannies? Is there a place to connect a cooler or something?
I have Hydramatic. | | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | Can you post a link/address to that information?
My 1954 Hydra-Matics' pulleys are the same as on my 1954 manual transmission trucks. | | | | | Joined: Dec 2008 Posts: 1,922 'Bolter | | 'Bolter Joined: Dec 2008 Posts: 1,922 | I've read that the 3/8" belt will just ride lower in the 5/8" groove (than the large belt) but give acceptable life, since the belts all have the same shape - the smaller one is just not using the top area of the big pulley.
Why are there different sizes? Different load capacity: the larger belt needs less tension for the same load and will last longer, but higher inertia, weight and cost. | | | | | Joined: Jun 2017 Posts: 120 'Bolter | | 'Bolter Joined: Jun 2017 Posts: 120 | In my case the belt just contacts the bottom of the pulley and slowly wears away the belt leaving this black rubber dust over the sides of the engine. You are also over tightening the belt in order for it to turn the pump and fan. | | | | | Joined: Oct 2016 Posts: 916 'Bolter | | 'Bolter Joined: Oct 2016 Posts: 916 | Yikes... you can run a narrower belt in a wider pulley, but the belt should NEVER be allowed to bottom out in that pulley.
Last edited by Norcal Dave; 06/28/2017 2:33 PM.
~ Dave
1950 Chevrolet 3600 3/4-ton with 261 engine & T5 Transmission
| | | | | Joined: Jun 2011 Posts: 5,096 Crusing in the Passing Lane | | Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | Second, never touch the bottom. Get the right belt to start with.
Ed
Last edited by EdPruss; 06/28/2017 11:27 PM.
'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
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