It could help your score.
Installment util counts for a tiny portion of your score, less than revolving util.
When your loans are deferred and your balance = loan amount, then your util is 100%. As you pay your balance down, your util lowers.
Do you have other installment/revolving debt that you are currently paying on,including interest, that you could divert your money to? You would still accomplish close to the same thing, maybe better, and be paying down debt that likely has a higher interest, saving you money.