no dont do that, do it properly. there are 3 bolts to loosen, a 13mm bolt thru a tothed wheel thing on driver side, a 13mm on passenger side thru a slotted hole, and a larger bolt 15mm iirc which is the main pivot bolt. put a spanner on the toothed wheel, and spin it to adjust the tension. 5mm deflection is what you're aiming for.
can see the big bolt and the bolt in the slotted hole here:

