I have a 1999 audi a4 quattro 2.8 with a bad coolant leak.

i took it to an audi specialist and they said my coolant crossover pipe was bad and needed to be replaced. it is going to be a 18-20 hrs of labor

i was wondering if there are any diy's on this
i need to remove the intake manifold
the front bumper
the timing belt

basically the whole middle of the motor

any diys for all that?