Disco-Ron Posted March 11, 2011 Share Posted March 11, 2011 This thread is just for info really, until yesterday i was unaware that there are two different lengths of belt fitted to defender 300's. only 15mm different, but stil.... Some vehicles apparently have a small pulley on the alternator, and some have a slightly larger one, well, when i went for a new belt the specialist guessed which one i needed, as i wasn't in the truck for him to check.... got home, took old belt off, and checked them against each other only to find that the one i removed was longer, well, i looked at the alt pulley and thought, there can't possibly be one smaller than that, so it should be the short belt i need, which is the one the specialist gave me, so, i fitted it......... and lo and behold, the truck now runs so much quiter its almost unreal....... i guess there wasn't quite enough tension on the various pulleys with the longer belt fitted...... So, check what belt you have, and what pulley you've got............. Quote Link to comment Share on other sites More sharing options...
duncmc Posted March 11, 2011 Share Posted March 11, 2011 I changed mine last week, and had the same thing. I had an educated guess based on the engine number that I needed the shorter one. The belt that came off was the longer belt, so the wrong one had been fitted. Now I am squeel free. Quote Link to comment Share on other sites More sharing options...
Disco-Ron Posted March 11, 2011 Author Share Posted March 11, 2011 mine didn;t squeel.......... it had a very faint tick... which turned out to be a very small fray in the belt fabric...... still, all good now... Quote Link to comment Share on other sites More sharing options...
hobson Posted March 12, 2011 Share Posted March 12, 2011 Any chance of part numbers for both belts? Quote Link to comment Share on other sites More sharing options...
western Posted March 12, 2011 Share Posted March 12, 2011 Any chance of part numbers for both belts? to 300tdi engine [Defender] 16L25164 Belt = ERR3287 now PQS000030 from 300tdi engine [Defender] 16L25165 Belt = ERR5911 same belts for Discovery 300tdi. Quote Link to comment Share on other sites More sharing options...
Les Henson Posted March 12, 2011 Share Posted March 12, 2011 The two types of pulley are interchangeable between what is basically the same alternator, so unless you know you have the original set-up on your truck - the relevant belt/part No is of little use. Les. Quote Link to comment Share on other sites More sharing options...
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