780 V6-2849cc 2.8L SOHC B280F (1987)
Early type sensor in early block
Piston-type oil pressure sensor, P/N 1218190-5. Oil flows past sensor piston into oil passage.
CORRECT
NOTE:
Early sensor remains available as a spare part.
New sensor in early block
If installed in early block as shown, too much oil will flow into drain passage reducing oil pressure.
INCORRECT