Go back and get him to produce an invoice that the idler pulley and tensioner pulley were both replaced. Whether they did it or not, this documentation will protect you for a year in the event either pulley fails. Most Honda parts are guaranteed for a year unless deemed to be a normal wear item such as brake pads and wiper blades. If a pulley seizes and destroys the belt and engine, you will have some recourse.*update*
i decided to get it changed from honda for piece of mind. i was afraid to goto an indie as i don't know anyone in my area and felt like for this one repair honda would serve me better. i called around got quotes and when i spoke to the service advisors they would always confirm it was the whole timing assembly being replaced but would never really list parts or seem to be detailed and would always say "yeah yeah its everything". i was just in the impression that honda is experts on this. i got a price for $1500 which seems to be the going in ny area but used a 10% service coupon and got it down to $1300 ish. when i dropped the vehicle off i asked again and they said its a kit and they do it all. today i picked up the vehicle and now the invoice/quote only showed:
timing belt with part #
water pump with part #
tensioner with part #
rad flush
coolant with part #
i asked about the idler/idler pulley and tensioner pulley/timing belt adjuster and if it was done and i got a reply that oh yeah it was i can put it on the invoice if you want. and i asked well only if it was done no point of writing it to write it and the rep replied that oh ya it was done sometimes the computer just puts it like that
You are correct in that you will never know. For the J35 engine, the OEM Honda pulleys are sourced from Koyo and they look almost new after 100K miles of use.maybe i am looking too much into this but for me it felt like maybe it wasn't done and the sa doesn't really know properly what was done but it could also be the case that the honda book tells them to change it all and it was indeed done. i will never know because even if i ask them again or speak to the tech he can just lie and i am too busy to take off timing cover etc
any input?