I have a 1992 Olds with the 3800 engine; the block heater is almost inaccessible. The engine is sideways and the block heater is in the frost plug location just over the frame at the back. Suggestion: unless it is leaking just take the frost plug out in the front of the engine and install the block heater there where it is accessible.
Duane
What makes you think it has one? Not all 88 Berettas had a block heater. If it does have one you should see a power cord somewhere.
They are in the exhaust flow
in my 89 Oldsmobile delta 88 , the heater motor was directly under the center of the windshield under the hood. black circular thing.
Check fuses Check for loose connection in fuse block
Under the passenger side seat.
chiltons auto repair manual
Usually passenger side behind glove box
were is the power door lock relay on a 1994 olds 88
how to remove timing cover with heater pipe attached 92 olds 88 3.8l
The heater core may be stopped up. Try flushing it, or replace it.
front side of plastic intake manifold
Probably the heater core, it is a beast of a job to do, but is gratifying to say the least. If the is a smell of antifreeze you can almost bet it is the heater core.