This factory service and repair manual for the 1985 Chevrolet P30 keeps four engines in view at once, and the differences between them shape most of the mechanical sections: a 292-cubic-inch inline-six, a 350 and a 454 gasoline V8, and a 6.2L diesel V8. The same running gear appears under a two-door van and under a bare chassis, in Base Stripped and Step-Van Delivery form. Specifications, torque values, wiring diagrams and diagnostics are given for each of those arrangements rather than averaged into one.
Engines covered
- 7.4L V8 (454 cu in) — OHV, naturally aspirated, gasoline
- 6.2L V8 (379 cu in) — OHV, naturally aspirated, diesel
- 4.8L inline-six (292 cu in) — OHV, naturally aspirated, gasoline
- 5.7L V8 (350 cu in) — OHV, naturally aspirated, gasoline
Body styles covered
- 2-door van
- Chassis
Trims covered
- Base Stripped
- Step-Van Delivery
Known issues on the 1985 P30. Six recalls sit on the federal record for this year. One covers a cooling fan blade that can fatigue and break away at the hub with the engine running, striking anyone near the open hood. Another involves a wheel cracking between disc and rim until the rim separates from the disc. A third concerns a left lower control arm that cracks and lets the ball joint pull out of it, taking steering with it. Two owner complaints are recorded, one on tires and one on suspension — the wheel, axle and front end work this manual specifies.
THE WHEEL MAY DEVELOP CRACKS BETWEEN THE DISC AND RIM. CONSEQUENCE OF DEFECT: IF THIS OCCURS AND
REPLACE WHEELS HAVING THE SUSPECTED MANUFACTURING CODE NUMBER.
THREE BOLTS WHICH ATTACH THE SILL THAT SUPPORTS THE BASE OF THE SEAT WERE OMITTED; THEREFORE VEHICLES DO NOT COMPLY WITH FMVSS 210 AND FMVSS 207.
INSTALL MISSING BOLTS.
DURING A COMBINED CORNERING AND BRAKING MANEUVER, THE TIE ROD END COULD CONTACT THE TIRE WALL.
REPLACE 16" WHEELS AND TIRES WITH 19 1/2" WHEELS AND TIRES; ALSO, REPLACE SPEEDOMETER GE
THE FAN BLADE, WHEN SUBJECTED TO HIGH STRESS LEVELS, CAN FATIGUE AND BREAK APART AT THE HUB WHILE THE ENGINE IS RUNNING.
REPLACE ENGINE FAN.
LEFT HAND LOWER CONTROL ARM CAN CRACK AND COULD EVENTUALLY CAUSE THE LOWER BALL JOINT TO SEPARATE FROM THE CONTROL ARM.
LOSS OF STEERING CONTROL CAN OCCUR WHICH COULD RESULT INA CRASH WITHOUT PRIOR WARNING.
REPAIR OR REPLACE LOWER LEFT CONTROL ARM.
REPLACED 4 TIRES DUE TO CORD RUPTURE ON 3 OUT OF 4 TIRES. TREAD SEPARATION BEGINNING. (DOT NUMBER: VNOR1WT TIRESIZE: 235/85R16)
FRONT AXLE BROKE RESULTING IN COLLISION WITH OTHER VEHICLE. (NEW JERSEY POLICE ACCIDENT REPORT).
