GASKET 8G5654 - Caterpillar

Engine: 3508 (S/N: 68Z1-UP; 69Z1-UP) 3508B (S/N: S2A1-UP; S2B1-UP; S2E1-UP; 5PS1-UP; S2D1-UP; 6PN1-UP) 3508C (S/N: TTB1-UP; LLE1-UP; TTA1-UP; LLC1-UP) 3512 (S/N: 24Z1-UP; 65Z1-UP; 49Y1-UP; 51Y1-UP; 67Z1-UP; PTG1-UP; PTH1-UP) 3512B (S/N: 2AF1-UP; S2G1-UP; S2H1-UP; S2J1-UP; S2L1-UP; 3ZW1-UP; 4AW1-UP; PWG1-UP; 8RM1-UP; PTF1-UP; FFG1-UP) 3512C (S/N: LLA1-UP; TTC1-UP; LLF1-UP; TTF1-UP; MLM1-UP; SLM1-UP; R1A1-UP; MKH1-UP; E3W1-UP) 3516 (S/N: 73Z1-UP; ZAL1-UP; 8TW1-UP) 3516B (S/N: 7RN1-UP; S2P1-UP; S2R1-UP; S2W1-UP; S2X1-UP; S2Z1-UP; BCK1-UP; S2S1-UP; S2T1-UP; PBR1-UP; GZT1-UP) 3516C (S/N: TTD1-UP; PAG1-UP; TTH1-UP; TTJ1-UP; JTS1-UP; PES1-UP; SBK1-UP)Excavator: 5130B (S/N: 2GR1-UP) 5230B (S/N: 7TR1-UP)Off-Highway Truck/Tractor: 783B (S/N: 4WJ1-UP) 785D (S/N: MSY1-UP) 789C (S/N: 8WM1-UP; 2BW1-UP) 797 (S/N: 3TN1-UP; 2CS1-UP; 1AW1-UP) 785C (S/N: APX1-UP; 1HW1-UP) 789 (S/N: 54Z1-UP) 793D (S/N: FDB1-UP) 797B (S/N: JSM1-UP) 777D (S/N: 2YW1-UP; AGY1-UP) 784C (S/N: 2PZ1-UP) 777D (S/N: 8BR1-UP)Generator Set: 3508B (S/N: ZAD1-UP) 3512 (S/N: 1KZ1-UP; FDR1-UP; 6WW1-UP; ZAF1-UP) 3512B (S/N: 1GZ1-UP; ZAH1-UP; ZAJ1-UP; PTM1-UP; 6GW1-UP) 3512C (S/N: SBG1-UP) 3516 (S/N: 1LZ1-UP) 3516B (S/N: ZAP1-UP; 8NW1-UP; FDX1-UP; GZY1-UP; ZAR1-UP) 3516C (S/N: SBJ1-UP)Power Module: 3516B (S/N: BPD1-UP) 3516C (S/N: MHB1-UP)Introduction
The problem that is identified below does not have a known permanent solution. Until a permanent solution is known, use the solution that is identified below.This issue affects cylinder heads on certain 3500 diesel product built between 15August 2008 and 28October 2008. These cylinder heads have been traced to a specific set of castings which can be identified by three raised dots located near the outboard machined rail of the head. Refer to Illustration 1.
Illustration 1 g01753074
(1) Three raised dots on the castingProblem
Cylinder head castings that were poured using a certain pattern are susceptible to a water passage core shift. These conditions have resulted in a potential for penetration into the water jacket passage at the following locations:
Though the drilled left hand side lifting eye hole. This is a 9.53 mm (0.375 inch) hole that is located 38.10 mm (1.50 inch) left of the injector bore.
Through the right hand side 15.88 mm (0.625 inch) rocker shaft bolt hole on the top deck of the cylinder head.Refer to Illustration 2.
Illustration 2 g01753094
Top view of the cylinder headHoles to check for coolant leaks (2) Lifting eye hole (3) Rocker shaft bolt holePenetration of the water passage by lifting eye hole (2) creates a coolant leak path into the rocker box and a subsequent oil dilution problem. Penetration of the water passage by rocker shaft bolt hole (3) may allow coolant in the engine oil or allow oil into the cooling system.Solution
The steps below are recommended in addition to standard troubleshooting steps for the following problems on engines within this date range:
A complaint of coolant in the oil
SOS sample results with higher than normal levels of Sodium or Potassium
Remove the valve cover