It is better to perform this work with the assistant.
We open a cowl.

Having squeezed a hand elastic cores of a cowl, we bring them out of openings in an arm.

Key "on 13" we turn off three nuts of fastening of a cowl to loops and we remove a cowl.

We establish a cowl, being guided on the remained traces on its inside.
At installation of a new cowl a key "on 13" we weaken nuts of fastening of loops to a cowl and we try to obtain uniformity of gaps on three parties of a cowl. Having accurately slightly opened it, we tighten nuts and, again having checked gaps, we establish an emphasis.
It is more convenient to regulate a cowl with the removed lock (see Replacement of the lock of a cowl).