Gary 05 AMB DST Posted September 9, 2021 Share Posted September 9, 2021 I'm trying to find the serpentine belt 3972375 as a spare. Seems that they are no more. Does anyone have the specs of it to compare to others as a replacement? Gary 05 AMB DST Link to comment Share on other sites More sharing options...
Rob connors Posted September 9, 2021 Share Posted September 9, 2021 Is that a Gates number for belt Link to comment Share on other sites More sharing options...
Admirial RVr Posted September 9, 2021 Share Posted September 9, 2021 Gary, Just got mine 3 months ago for ISL400 Cummins part # 3972263. Purchased this from Cummins.dieselengines.parts In Boca Raton,FL 33434. It took about 3 weeks for delivery. Hope this helps. 1 Link to comment Share on other sites More sharing options...
klcdenver Posted September 9, 2021 Share Posted September 9, 2021 Napa crossover Part #: NBH 25080839HD. Gates #K080839HD You can go to any reliable parts store and they can cross reference it. It is available in an OEM on ebay an amazon also. Link to comment Share on other sites More sharing options...
Gary 05 AMB DST Posted September 9, 2021 Author Share Posted September 9, 2021 Thanks, I was zeroing in on Dayco belts. Never thought about other manufacturers. Rob, I have no idea what manufacturer that number is for. Just wrote down the number in my owner's manual thinking that it would be a coverall. Thanks again, Gary 05 AMB DST Link to comment Share on other sites More sharing options...
JohnnyDiesel Posted September 9, 2021 Share Posted September 9, 2021 Oem belt is on ebay. Dated 2020 so it's not old stock. https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.com%2Fp%2F510928574 Link to comment Share on other sites More sharing options...
Nevada Rob Posted September 9, 2021 Share Posted September 9, 2021 https://www.dieselpartsdirect.com/ds3972375 Website reads the item is in stock. Link to comment Share on other sites More sharing options...
Ivylog Posted September 10, 2021 Share Posted September 10, 2021 I use EBay as a cross reference source and usually the best price if not need as fast as Amazon will get it to you. Link to comment Share on other sites More sharing options...
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