Challenger L4-2555cc 2.6L (1983)
Cylinder Block Assembly: Technical Service Bulletins
Cylinder Head & Block - Resurface Limits
Models
1981 - 1986 Domestic Vehicles With 2.6L Engine & All 1981- 1986 MMC Vehicles Equipped With Gasoline Fueled Engines
Subject
Cylinder Head & Block Resurface Limits
Index
ENGINE
Date
March 14, 1986
No.
09-08-86
P-932-C
This bulletin contains cylinder head and block resurfacing limits for all current MMC engines except diesel.
NOTE:
DIESEL ENGINE CYLINDER HEADS AND BLOCKS SHOULD NOT BE RESURFACED AS VALVE INTERFERENCE
WITH THE PISTONS WILL OCCUR.
FIGURE 1
Measure the cylinder head and/or cylinder block using a straight edge and feeder gauge as shown in Figure 1. The maximum out-of-flat limits are:
Cylinder Head - 0.2 mm (.008") Cylinder Block - 0.1 mm (.004")
If grinding to correct flatness is necessary, do not exceed the following limits:
Cylinder Head - 0.2 mm (.008") Cylinder Block - 0.1 mm (.004")
If both cylinder head and block must be ground to correct flatness, do not exceed 0.2 mm (.008") combined or valve-to-piston interference could occur.
Overall height of cylinder head (standard value for new part).
G15B (4G15)
107.0 +/- 0.1 mm (4.213 +/- 0.004")
G32B
88.5 +/- 0.1 mm (3.484 +/- 0.004")
G54B (4G54)
90.0 +/- 0.1 mm (3.543 +/- 0.004")
G63B
90.0 +/- 0.1 mm (3.543 +/- 0.004")
4D55
94.0 +/- 0.1 mm (3.701 +/- 0.004")
