Engine VIN code 2,5,R,V. With premium positive valve stem seals.
2.5L / 151 OHV L4 8V "1,2,5,9,R,U,V" Pont. 4.000" Bore 77-92
GM
2.5L / 151 OHV L4 8V "A,E" Pont. 4.000" Bore 85-93
GM, CHEVROLET
GM151C-PO | 2.5L / 151 OHV L4 8V "1,2,5,9,R,U,V" Pont. 4.000" Bore 77-92
BUICK,
CHEVROLET,
PONTIAC
GM151T-PO | 2.5L / 151 OHV L4 8V "A,E" Pont. 4.000" Bore 85-93
CHEVROLET,
GMC