I recently bought a 67 L79. the water pump belt looked very loose; it was probably a Napa belt. I ordered a 'correct' one from C Central, wrapped belt I assume made by Quanta. That belt is also loose allowing for about 1/2" deflection with little pressure, and of course there is no adjustment on the WP belt. My crank and WP pulleys are original as is the water pump so I cannot think of anything that is off in the hardware. I have no belt squeal and a restorer/friend says it probably isn't a problem as I have 50% wrap on both pulleys in addition to the alternator pulley belt. I could just go to Napa and get a belt 1/2" shorter but I plan to have the car judged and would like to get the correct length belt- any thoughts or info would be appreciated. Thanks, Jim Baker
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67 L79 Water Pump Belt
Jim,
Are you talking about the captive belt that goes around just the water pump and crank pulleys? Do you know what Quanta part number yoy got? And do you know the outer circumference of the belt? I have a Quanta belt for my '66 L79 at home that I can measure when get home tonight.
Gary -
Re: 67 L79 Water Pump Belt
Yes, I am talking about the captive belt that goes around the water pump and crank pulleys. No, I didn't think to measure the belt. thanks for response.Comment
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Re: 67 L79 Water Pump Belt
Jim,
Measure your belt with a cloth tape measure around the outside and I'll do the to mine. Since my Quanta belt is new and never installed, if we get the same measurement it suggests that I will have the same problem when it comes time for me to install the belt. But it my belt is shorter, that might be useful information.
GaryComment
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Re: 67 L79 Water Pump Belt
Jim------
Reproduction belts usually have the GM part number embossed on them (or, printed in the case of 73+ belts). So, what is the number on yours?In Appreciation of John HinckleyComment
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Re: 67 L79 Water Pump Belt
Mark-----
GM #3837810 is the one.In Appreciation of John HinckleyComment
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Re: 67 L79 Water Pump Belt
Jim,
My Quanta belt is GM # 3837810 and the length along the outside is 34 3/8".
GaryComment
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Re: 67 L79 Water Pump Belt
Quanta sells a long and short version of the belt. Try the short one.
Home > RESTORATION FAN BELTS > GM FAN BELTS > CHEVROLET BELTS > Corvette > 1966 - 1967 Small Block
1966-1967 Corvette Water Pump Belt, S.B. 350 HP w/o AC & PS
Item Number : 29-B-075B
Unit Price: $24.00
Applications: 1966 - 1967 Corvettes with 350 Horse Power engines, without Air Conditioning, without Power Steering
Features: Cloth-wrapped with GM emblem, Chevrolet part number, broadcast code (where applicable), belt size (where applicable), manufacturer's symbol and construction codes
Original Part Number on Belt: 3837810. Short Version
GM Restoration Part Produced by Quanta under license from General Motors
Packaging: Sleeved
Part Number: 29-B-075BComment
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Jim, how did your belt story turn out?
Jim,
In the end, did it turn out that you had the "long" version of the Quanta's L79 belt?
GaryComment
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Re: Jim, how did your belt story turn out?
Gary, I am not sure yet. I don't have time to work on the car now. I assumed I had the long belt and have ordered the short one from Quanta. We're going to be gone for a couple of weeks so late this month I will try to put it on. Will try to remember to send you a follow-up when that is done. Send me a short email (jmbvette@aol.com) if you don't mind so I have your email address, that will also help jog my memory; thanks,Jim BakerComment
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