Engine Rebuild Guide, Break-In and Tune-Up
02
010
11
RG,RG34710,51 –19–16OCT00–1/2
Sealant Application Guidelines
Listed below are sealants which have been tested and
are used by the John Deere factory to control leakage
and ensure hardware retention. ALWAYS use the
following recommended sealants when assembling
your John Deere Diesel Engine to ensure quality
performance.
LOCTITE

thread sealants are designed to perform to
sealing standards with machine oil residue present. If
excessive machine oil or poor cleanliness quality exist,
clean with solvent. Refer to John Deere Merchandise
and Parts Sales Manual for ordering information.
IMPORTANT: LOCTITE

gasket materials are NOT
designed to work with oil residue
present. Oil residues must be
cleaned from surfaces before
applying gasket material.
LOCTITE

242 Thread Lock & Sealer (Medium
Strength) (blue):
TY9370 6 mL (0.2 oz) tube
• Threaded plugs and fittings: cylinder block (oil
galley).
• Cap screws: coolant pump, timing gear cover,
camshaft gear access cover, oil pump.
• Oil pressure sending unit.
• Turbocharger oil inlet fitting.
• Fuel filter check valve or elbow (filter header end)
dual rail fuel system.
• Piston spray jets.
• Timing gear cover gasket and camshaft gear access
cover gasket on earlier engines using Fel-Pro
gaskets.
• Idler gear carrier cap screws, camshaft gear retainer
cap screws and fuel supply pump drive coupler cap
screws.
• EUI hold-down clamp cap screws.
LOCTITE

271 Thread Lock & Sealer (High
Strength) (clear):
TY9371 6 mL (0.2 oz) tube
• Oil filter adapter-to-base.
LOCTITE

277 Thread Lock & Sealer (High
Strength) (red):
T43514 50 mL (1.7 oz) bottle
• Expansion plugs in cylinder head and block.
LOCTITE

515 Flexible Sealant (General Purpose)
(purple):
TY6304 50 mL (1.7 oz) bottle
• Timing gear cover and camshaft gear access cover
gasket on earlier engines using Fel-Pro gasket.
LOCTITE

592 Pipe Sealant with TEFLON

(white):
TY9374 6 mL (0.2 oz) tube
• Pipe plugs: cylinder block (water manifold),
thermostat housing, air intake manifold, and coolant
pump.
• Temperature sending unit.
• Coolant heater.
• Oil pan drain valve/hose.
LOCTITE

680 Maximum Strength Retaining
Compound (green):
TY15969 6 mL (0.2 oz) tube
• Crankshaft flange and ID of front wear sleeve for
front and rear oil seal/wear sleeve installation.
• Steel cup plugs on cylinder head and block.
LOCTITE is a registered trademark of Loctite Corp.
TEFLON is a registered trademark of Du Pont Company
CTM100 (06APR04)
02-010-11
P
OWER
T
ECH
10.5 L & 12.5 L Diesel Engines
040604
PN=59
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