Hi guys! I've been calling around getting quotes for servicing my camry at 150,000kms and toyota and a few other places quote me for around $620 for a normal major service which I'm told includes the timing belt. Theres this other place that I called that quoted me close to $1k that included a water pump. Do I really need to change that? The other places said I could change it if I wanted to but it isn't in their package. Any advice?