My 63 has the wrong water pump pulley on it so in an effort to correct it. I purchased what I thought was the correct W/P pulley 3770245 which is larger than the 6 inch currently on there. It already appears to have the correct crank, idler pulley, water pump repro belt as replacements are the exact same size. The idler pulley looks like 3 3/4. What am I doing wrong Belt is 15375 or I believe 37.5 inches. It looks like an inch short. HELP! I'm about to put the wrong pulley back on.
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Bob, I came up with 3840463 for the water pump. Probably not correct as somewhere in the description it mentions C60.
I'll keep looking.
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supposedly, GM 3843164 is correct original but it shows as 37.5 inches which is what I haveComment
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Hi Joe. I mentioned the idler pully. 327/360. The idler is 3 and 3/4, the water pump pulley (02456) is just over 8 inches and it looks like the crank pully is 7 inches. Is something wrong with one of them?Comment
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Bob,
The crankshaft pulley should be deep groove and part number end in 533. If everything lines up normal and it's just the reproduction belt that's where I would look for the problem.
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Bob------
Yes, I should have deduced that you were talking about a 340 or 360 hp application because of the idler pulley.
The correct pulleys are as follows:
balancer--------GM #3766987 (original pulley) replaced by 8/64 by GM #3858533. Both pulleys are 6-3/4" OD
waterpump------GM #3770245 7-1/8" OD
idler assembly----GM #3829191 (consists of pulley, bracket, & bearing)In Appreciation of John HinckleyComment
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Thanks guys. I am going to talk with Quanta tomorrow now that I know pulleys are correct. The belt is close to fitting but want to see some adjustmentComment
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