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Caterpillar · Engine
1662903
In stock · ships from Knoxville
This is a Caterpillar O-ring seal, part number 1662903. It is most commonly used as the injector sleeve O-ring in Cat 3406E and C15 diesel engines.
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Caterpillar
Caterpillar
May also be used in other engine assemblies requiring a 34.59mm ID O-ring; always verify against your engine serial number.
Part data verified against 5 catalog sources
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The ring creates a tight, leak-proof seal between the injector sleeve and the cylinder head, preventing fuel and combustion gases from mixing and keeping coolant out of the fuel system. You replace it whenever the injector sleeve is removed, or if you see external fuel or coolant leaks around the injector area.
Part Number: 1662903
CAT INJECTOR SLEEVE O-RING
Vendor: STOWERS MACHINERY
Dealer: KP Services Crossville
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