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Spark Plugs
Introduction
Your Cat dealer offers engine parts that are designed by Caterpillar engineers to work and wear as a system to deliver the product and effi-
ciency you expect from your Cat equipment. This section contains some of the most commonly purchased maintenance parts. If you don't find
what you are looking for, contact your Cat dealer. We can help you choose the right parts for your machine arrangement and application.
Engine Spark Plugs
Spark plugs enable the ignition of compressed fuel/air. Cat spark plugs are designed to provide easy removal and installation, limiting the
amount of downtime required during each maintenance interval so that your engine is back up and running as soon as possible.
Part
Number Recommended Application Engine
For Shipping Purposes
Engine Serial
Number Prefix Length Width Height Weight
104-3170G3408 Std plug for 11.4:1 G34006RJ, BAZ, 3WR, 6FW, 3NK,
6ZM, 8LW, CTP
81.28 mm 22.86 mm 22.86 mm 3.30 mm
G3408C Std plug for 11.4:1
G3412 Std plug for 11.4:1
G3412C Std plug for 11.4:1
128-6238G3408C Std plug for 8.5:1 G3400 BAZ, 3WR, 6FW, 6ZM, 8LW,
CTP
81.28 mm 22.86 mm 20.32 mm 3.30 mm
G3412C Std plug for 8.5:1
194-8518G3500 Std plug for all Magento, EIS, and
ADEM III
G3500 2JF, 4KC, 3RC, 4WD, 5JD,
8LD, 9TG, 7NJ, 4EK, 5PN,
9AW, 6JW, 8PW, 2TJ, 9FP,
5ZZ, 8JZ, 7SZ, 8BZ, GET
115.01 mm 23.01 mm 23.01 mm 5.82 mm
All G3600 Natural Gas G3600 3XF, 4WF, 1YG, 4CG, 4ZS,
BEN, BKE, BLB
243-4291All G3600 Natural Gas G3600 3XF, 4WF, 1YG, 4CG, 4ZS,
BEN, BKE, BLB
116.84 mm 30.48 mm 30.48 mm 6.35 mm
G3500 and All G3600 Bio-Gas (Landfill Gas
and Digester Gas)
G3500
and
G3600
3XF, 4WF, 1YG, 4CG, 4ZS,
BEN, BKE, BLB, MAD, HAT,
GZK, GZJ, LGS
2N-2839 G3304 and G3306 Std plug G3300 37Y, 07Y 75.95 mm 20.07 mm 20.07 mm 3.81 mm
G3406 Std plug for 9.4:1 and 10.3:1G3400 4FD, 1RK, 5NW, CTS, 6NB,
7DB, CTP
G3408 Std plug for 9.4:1 and 10.3:1
G3412 Std plug for 8.5:1, 9.7:1, and 11.4:1
301-6663G3500 EIS G3500 4WD, 5JD, 8LD, 9TG, 7NJ,
4EK, 5PN, 9AW, 6JW, 8PW,
2TJ, 9FP, 5ZZ, 8JZ, 7SZ, 8BZ
114.30 mm 25.40 mm 25.40 mm 5.97 mm
346-5123G3500B and G3500C G3500 7EZ, CEY, CTW, CSC, CME,
CFD, CTK, BGW, GAS, GSB,
GWD, GZA, GZB, GZC, GZG,
GZH, GZL, GZM, GZN, GZP,
GZZ, CWD, CWW, CWY, B9P,
GHC, GHE, HEB, ZBB, ZBC,
TJB, TJC, SLY, RLP, HAL,
SXY
103.96 mm 22.00 mm 22.00 mm 6.45 mm
4W-2256 G3304 and G3306 Canadian Standard As-
sociation (CSA)
G3300 37Y, 07Y 90.17 mm 25.40 mm 22.86 mm 6.10 mm
G3406 CSA for 9.4:1 and 10.3:1 G3400 4FD, 1RK, 5NW, CTS, 6NB,
7DB, CTP
G3408 CSA for 9.4:1 and 10.3:1
G3412 CSA for 8.5:1, 9.7:1, and 11.4:1
359-7744G3500C and G3500E G3500 GAS, GSB, GZA, GZB, GZC,
GZE, GZH, GZL, GZM, GZN,
GZZ, NGS, RLP, SSR
119.99 mm 24.99 mm 24.99 mm 7.57 mm
430-4521G3500H G3500 GFP, GLM, GLN, GZC 119.99 mm 24.99 mm 24.99 mm 7.29 mm
Note: Regarding Electrode Gap Setting. Refer to Operation Maintenance Manual for your engine or contact your local Cat dealer.