RELIEF VALVE GROUP 9J7870 - Caterpillar

Illustration 1 g00819698 (1) Dowel pins The dowel pins in the cylinder block hold the cylinder head gasket in the correct position when the cylinder head is installed. (2) Cylinder head gasket
Table 1
Selection of Head Gasket for the C0.5, C0.7, C1.1/3011C and C1.6 Engines
Piston Height above Top Face of Cylinder Block Gasket Thickness
0.55 to 0.64 mm (0.0217 to 0.0252 inch) 1.2 mm (0.047 inch)
0.65 to 0.75 mm (0.0256 to 0.0295 inch) 1.3 mm (0.051 inch)
Table 2
Selection of Head Gasket for the C1.5/3013C Engines
Piston Height above Top Face of Cylinder Block Gasket Thickness
0.60 to 0.69 mm (0.0236 to 0.0272 inch) 1.3 mm (0.051 inch)
0.70 to 0.79 mm (0.0276 to 0.0311 inch) 1.4 mm (0.055 inch)
Table 3
Selection of Head Gasket for the C2.2/3024C Engine
Piston Height below Top Face of Cylinder Block Gasket Thickness
−0.45 to −0.30 mm (−0.0177 to −0.0118 inch) 0.4 mm (0.016 inch)
−0.29 to −0.20 mm (−0.0114 to −0.0079 inch) 0.5 mm (0.020 inch)
Table 4
Selection of Head Gasket for the C2.2/3024CT Engine
Piston Height below Top Face of Cylinder Block Gasket Thickness
−0.29 to −0.20 mm (−0.0177 to −0.0118 inch) 0.5 mm (0.020 inch) (3) The stamped marking on the cylinder head gasket must face upward. This ensures that the cylinder head gasket is installed correctly. Tightening Procedure for the Cylinder Head
C0.5 Engine
Illustration 2 g01112400Use the following procedure in order to tighten the bolts for the cylinder head.
Put clean engine oil on the threads of the bolts. The bolts are tightened in the numerical sequence that is shown in Illustration 2. Torque for bolts C0.5 ... 36.5 N m (26.9 lb ft)
Repeat the procedure in Step1 to ensure that all of the bolts are tightened to the correct torque. C0.7, C1.1/3011C and C1.5/3013C Engines
Illustration 3 g00900073Use the following procedure in order to tighten the bolts for the cylinder head.
Put clean engine oil on the threads of the bolts. The bolts are tightened in the numerical sequence that is shown in Illustration 3. Torque for bolts C0.7 ... 36.5 N m (26.9 lb ft)C1.1/3011C ... 51 N m (37.6 lb ft)C1.5/3013C ... 101 N m (74.5 lb ft)
Repeat the procedure in Step 1 to ensure that all of the bolts are tightened to the correct torque. C1.6 and C2.2/3024C and C2.2/3024CT Engines
Illustration 4 g00900074Use the following procedure in order to tighten the bolts for the cylinder head.
Put clean engine oil on the threads of the bolts. The bolts are tightened in the numerical sequence that is shown in Illustration 4. Torque for bolts C1.6 ... 51 N m (37.6 lb ft)C2.2/3024C and C2.2/3024CT ... 101 N m (74.5 lb ft)
Repeat the procedure in Step 1 to ensure that all of the bolts are tightened to the correct torque. Measuring the Distortion of the Cylinder Head
Illustration 5 g00900977
Typical example
Distortion of the cylinder head ... 0.00 to 0.05 mm (0.000 to 0.002 inch)Maximum service limit ... 0.12 mm (0.005 inch)Maximum limit for regrinding ... 0.15 mm (0.006 inch)Note: Use a straight edge and a feeler gauge to check the six positions for