polaris Posted April 26, 2023 Share Posted April 26, 2023 (edited) Hi all, Started my 2007 350Z Rev Up this morning and it doesn't sound right. Watch both videos and let me know what you think. Video 1 Video 2 No CEL; no codes either. A/C on/off doesn't seem to affect the pitch or frequency. I can't exactly pinpoint where it's coming from but it sounds like it's coming from near the crank/A/C compressor area? Frequency changes with RPM. There's also a weird white notch/line in the A/C belt which I can't remember being there which is possibly related. I've already booked in to see a local mechanic tomorrow but I'm hoping one of you lot have had this issue before. Slightly bricking it! Edited April 26, 2023 by polaris Quote Link to comment Share on other sites More sharing options...
mr v6 Posted April 26, 2023 Share Posted April 26, 2023 I'd remove the A/C belt & run it again. Easy enough to remove. If the noise goes then you know where to start the diagnosis. 1 Quote Link to comment Share on other sites More sharing options...
polaris Posted April 26, 2023 Author Share Posted April 26, 2023 (edited) 3 hours ago, mr v6 said: I'd remove the A/C belt & run it again. Easy enough to remove. If the noise goes then you know where to start the diagnosis. Just done it. Removed the A/C belt and tensioner. Think I've found the problem. I was really worried for a second as a sounds like these are usually followed by a large repair bill! I'm going to replace both tensioners and both belts. Surprised me really as the belts were replaced in 2021 according the service history. No idea when the tensioners were last replaced; could possibly be original... Worn tensioner New dual-channel A/C belt design Less belt contact = less friction = more power? Edited April 26, 2023 by polaris Quote Link to comment Share on other sites More sharing options...
polaris Posted April 28, 2023 Author Share Posted April 28, 2023 (edited) Could someone give me a hand identifying which parts I need for my Z. It's a late production Rev Up as the date of manufacture is 10/2006 although some VIN decoding websites say 08/2006. I'm using amayama to find and buy these parts. Looking to buy: OEM A/C & serpentine tensioner (whole assembly for both) and both OEM belts A/C belt is easy as there's only one available for my car, 11920-AG900 A/C pulley has two options (11925-AG300 and 11925-AG30A), I'm assuming AG30A is the one I need? Alternator pulley (serpentine) has two options also (11925-AL500 and 11925-AL50A), AL50A again? Alternator belt is the trickiest one. Two options: 11720-4P10A and 11720-4P102. Nissan.co.uk say 11720-4P102 but TORQEN say 11720-4P10A with this on their website 'These belts are for vehicles between late 2006 models (after production date 08/06).' Anyone know what I need? Thanks all Edited April 28, 2023 by polaris Quote Link to comment Share on other sites More sharing options...
ZMANALEX Posted April 28, 2023 Share Posted April 28, 2023 I have new belts in stock and possibly a set of pulleys off a 29,000 mile 350 which will fit your application. Quote Link to comment Share on other sites More sharing options...
Adrian@TORQEN Posted April 28, 2023 Share Posted April 28, 2023 12 hours ago, polaris said: Could someone give me a hand identifying which parts I need for my Z. It's a late production Rev Up as the date of manufacture is 10/2006 although some VIN decoding websites say 08/2006. I'm using amayama to find and buy these parts. Looking to buy: OEM A/C & serpentine tensioner (whole assembly for both) and both OEM belts A/C belt is easy as there's only one available for my car, 11920-AG900 A/C pulley has two options (11925-AG300 and 11925-AG30A), I'm assuming AG30A is the one I need? Alternator pulley (serpentine) has two options also (11925-AL500 and 11925-AL50A), AL50A again? Alternator belt is the trickiest one. Two options: 11720-4P10A and 11720-4P102. Nissan.co.uk say 11720-4P102 but TORQEN say 11720-4P10A with this on their website 'These belts are for vehicles between late 2006 models (after production date 08/06).' Anyone know what I need? Thanks all Hi, In case you missed it, my colleague replied on your 350z-UK Facebook group with the correct part numbers for your car. 1 Quote Link to comment Share on other sites More sharing options...
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