Fiero L4-151 2.5L (1985)
Cylinder Head Bolts: Customer Interest
Engine - Coolant Loss
Number:
87-6 (GAS)-94 Date: 7/89
BROKEN CYLINDER HEAD BOLT/COOLANT LOSS
Subject:
(NEW BOLT/GASKET)
1985-87 6000, FIREBIRD 85-86, GRAND AM AND FIERO MODELS WITH 2.5L ENGINES
Major Tools Required:
Reversible Electric drill J-24460 and J-23699 Coolant System Pressure Tester
J-36660
Torque-Angle Wrench
J-38188
Head Bolt Kit:
J-38188-1
Cylinder Head Bolt Extractor
J-38188-2
3/16" Drill Guide
J-38188-3
3/16" Drill Bit
J-38188-4
Center Drill Guide
J-38188-5
Center Drill Bit
Figure 1
The following passenger cars equipped with the 2.5L engine may experience coolant loss due to broken cylinder head bolts:
1985-87 6000s with 2.5L engine (VIN Code R) 1985-86 Firebirds with 2.5L engine (VIN Code 2) 1985-87 Grand Ams with 2.5L engine (VIN Code U)
1985-87 Fieros with 2.5L engine (VIN Code R)
The head bolts most susceptible to this condition are the center three located closest to the exhaust manifold, i.e. bolts # 2, # 3, and # 6, see FIGURE 1.
If one of these three bolts is broken, replace all 3 bolts with new ones per the Application Table.