RWD 19xx-1984 DeVille and Fleetwood,1985-1996 Flee
Went to flush my coolent last year.
The knock sensors are located where the block drain plugs would have been in earlier SBC.
Both sencers were stuck in the block.
The sencer inside broke loose from the outside shell.
The shell was still stuck in the engine.
Not a lot of room to get Vice-grips...