Changing a part advice

[Blue MK2]

Im going to change the plastic casing that is bolted to the head with two bolts. Its the part that all the collant pipes attach to and has two sensors on top of it (one blue and one black). It has hairline cracks and ive lost alot of collant from it.

Any tips/things i should look out for peeps?

thanx in advance

[golfvr6]

Should be simple and straightfoward.

[Blue MK2]

all done. piece of cake. no more leaks