K 30 1 Ton Pickup 4WD V8-379 6.2L DSL VIN J FI (1982)
Cylinder Head Gasket: All Technical Service Bulletins
Head Gasket - Leakage
Number:
83-140
Section:
6A (VI)
Date:
June, 1984
Subject:
HEAD GASKET LEAKAGE - 6.2L V8 DIESEL ENGINES
Model and Year:
1982-83 "C/K/P" 10-30 SERIES TRUCKS AND 1983 "G" 10-30 SERIES VANS
TO:
ALL CHEVROLET DEALERS
THIS BULLETIN CANCELS AND SUPERSEDES 83-T-76 (AUGUST, 1983). ALL COPIES OF WHICH SHOULD BE DESTROYED.
External engine coolant loss on the 6.2L diesel has been from the rear lower corner of the left cylinder head and the front lower corner of the right
cylinder head. This coolant loss is the result of a sealing condition around the core cleanout hole in the cylinder head. To correct this condition a brass
plug kit has been released to seal the core hole. Brass plug kit, P/N 14077197, includes two (2) plugs and one (1) driver. The following procedures
should be adhered to when a cylinder head is removed for service. Both heads must have the plugs installed during this service operation.
CYLINDER HEAD GASKET REPLACEMENT AND BRASS PLUG KIT INSTRUCTIONS
1.
Removal
A.
Disconnect battery.
B.
Remove injection lines and intake manifold.
C.
Remove rocker arm cover.
D.
Drain coolant into a clean container and save for refilling.
E.
Remove dipstick tube (left side).
F.
Disconnect ground strap.
G.
Raise vehicle.
H.
Disconnect exhaust pipe from manifold.
I.
Lower vehicle.
J.
If equipped with A/C move out of the way without disconnecting the fluid hoses.
K.
Remove generator.
L.
Disconnect glow plug wires.
M.
Remove rocker arm assemblies.
N.
Remove push rods. Mark push rods for reinstallation. Place rocker arm shafts and push rods in a rack so they may be reinstalled in the same
location, and orientation.
O.
Disconnect radiator, bypass, and heater hoses.
P.
Remove thermostat housing/crossover at cylinder head.
Q.
Remove cylinder head bolts (17 each side). Rear left cylinder head bolt may have to remain in the head upon loosening.
R.
Remove cylinder head.
2.
Inspection and Repair
A.
Inspect the cylinder head for cracks in the exhaust ports, combustion chambers, or external cracks to the coolant chambers.
B.
Clean the cylinder head mating surface.
