Hair line starts to appear

[Tomasz]

G’day
I need some assistance
I have 282 sailfish 2002.
I’ve started to notice hair lines appearing in the bottom of my engine bay where meets the transom. I’ve had the boat surveyed about 1and 1/2 years ago and got the all clear.
I’ve done a bit of knocking around the transom today it sounded good.
Is there a way of fixing this ?
Many thanks
Tom

 

[Hookup1]

Put some photos up.

Look at the rub rail on the transom too - the fiberglass around the top and bottom out to the end of the boat.

 

[Fishtales]

Recommended to get some pics of the lower transom (inside and out), mounting bolts on the engines (inside), bang plate areas and small white pieces in corners, finally inside motor well bolts and backside where bang plate overlaps on the outside of the transom.