either the bolts are loose, bolts are not number 8 bolts, or the belt is to tight and out of alignment
[ADDED] Another possibility is that they were removed and replaced at some time, but over-tightened so over-stressing them. A too-tight belt may or may not affect the bolts, but it will shorten the lives of not only itself, but also the bearings on all the shafts it drives.
How do you remove the steering wheel on a 1998 Chevy astro van
You can add power steering fluid to your 1988 Chevy Astro by removing the top to the power steering fluid reservoir. Pour the fluid directly into the reservoir.
under the hood
For a 1987 there is no automatic doors or windows for A Chevy Astro Fuse is underneath the steering colum along the Driver side feet...
i replaced the steering column and the fuel filter. the radio was stolen
$60-$80
Square switch to the left of the steering wheel.
there is small bracket that bolts on the back of the pump to the block some pumps are missing a stud for that bracket also check the big horse shoe bracket that bolts to the front of the block that all the asscesiories bolt to it could be cracked causing the bracket in question to break
Its has HydraBoost Braked, operates off the power steering pump.
under the hood on the passenger above the blower motor mounted to a bracket.
The Astro Van power steering and brakes work off the same pupm. Check the pump for fluid. If it's full and the brakes and steering still hard you must replace the pump
With special tools such as a wheel puller and a lockplate remover.