You will experience two problems. The CBSA agent will ask you
- Why are you spending time in Toronto before travelling to Montreal where you are ostensibly settling?
- Why are you returning to your home country?
If you can provide satisfactory answers to both questions, you might not have an issue. However, you will need a PR Card to return to Canada later and that will only be mailed to a Canadian address which then leaves you with a problem of how you will travel back to Canada.