Serpentine Belt Replacement (September 2023):
As vehicle gets old, it is important to check and replace critical rubber parts such as serpentine belt, timing belt, bushes, dampers, hose pipe, dust boot and etc. These parts get dry rot overtime and start to break apart. Some might only make noise and/or vibration but others can cause serious failure or damage to other parts.
Serpentine belt is used to drive multiple peripheral devices such as an alternator, power steering assist (only in some cars), water pump, AC compressor & etc. It is a reinforced belt designed to last 1-1.5 lakh kilometers or 10 years. Common issues are squeezing noise and/or slipping due to loss of belt tension and peripheral devices will not function properly.
Mine didn't cause any serious issues but the belt had minor cracks and worn down v-ribs so it was time to change it. My car has auto tensioner so no adjustments required and it only takes few mins to replace the belt.
Boodmo has stopped selling OEM Honda parts and ASC doesn't give parts over the counter. This is really a deal breaker for those who are considering buying Honda cars and me too in future. Anyway, OEM belt (38920-RB0-004) spec is 5PK1137 (1137mm length with 5 ribs) and I found the nearest size (5PK1135) from Continental brand. There are other brands such as Gates, Optibelt, Fenner, Pix but they were plus 3mm to 8mm (1140, 1145). Auto tensioner has spring inside to put pressure on the belt and it will also lose some tension after many years so I thought a slightly tighter belt will compensate.
Product Link:
Boodmo (Contitech 5PK1135 Multi V-Belt)
Product Pictures:
Replacing the belt is pretty simple and only 19mm spanner is required to lift the auto tensioner. Although it is possible to hold the spanner in one hand and remove old belt but fitting new one will be tricky so I used a zip tag to secure the spanner to nearby bolt and then work on routing the new belt. I also had to remove wheel well cover for easy access.
Here is a video on how to replace Serpentine Belt on Honda Jazz which is very similar to Honda City. I didn't had to remove the wheel though, just turned the steering to far right.
Belt Diagram:
Belt wear indicator on Auto Tensioner:
After Installation:
Old Belt: