3803703 3080760 Cylinder Liner for Cummins M11 ISM QSM11 Engine

3803703 3080760 Cylinder Liner for Cummins M11 ISM QSM11 Engine Overhaul

The 3803703 3080760 cylinder liner is used for Cummins M11 ISM QSM11 L10 engine rebuild applications. It is commonly selected during in-frame overhaul, liner replacement, block inspection and fleet maintenance work when the original liner shows bore wear, cavitation, coolant leakage, low compression or piston scuffing.

This page is focused on the 3803703 3080760 liner group only. These references are commonly listed together for Cummins M11-family liner applications, but final fitment should still be verified by CPL, engine serial number, removed liner dimensions and O-ring configuration before ordering.

Identification Data for 3803703 3080760 Cylinder Liner

Why This Liner Is Ordered for M11-Family Engines

Cummins M11, ISM and QSM11 engines are often used in high-load service where cylinder sealing and cooling stability are critical. A worn or cavitated liner can reduce compression, increase blow-by, contaminate engine oil with coolant and shorten piston ring service life.

The 3803703 reference is commonly used for cylinder liner kit supply, while 3080760 is frequently listed as a related liner reference in the same service group. For this reason, the two numbers can be kept on one product page instead of splitting them into separate pages.

This is especially important for engines with previous rebuild history, mixed aftermarket parts, imported used equipment or unknown CPL configuration. The removed liner and engine data should be checked together before order confirmation.

Common Application Scenarios

Failure Conditions That Usually Require Liner Inspection

Inspect the cylinder liner when the engine shows low compression, heavy blow-by, white smoke, coolant loss, coolant in oil, overheating, hard starting, abnormal crankcase pressure or repeated piston ring failure.

During teardown, check the liner bore surface, upper wear ridge, O-ring sealing area, lower liner wall, flange contact area and block counterbore condition. Cavitation pitting near the coolant side is a common reason for wet liner replacement.

If only one cylinder has failed, the remaining cylinders should still be measured. Uneven wear may indicate cooling system problems, poor air filtration, injector issues, oil contamination or incorrect previous assembly.

Pre-Order Verification Checklist

Before ordering 3803703 3080760, confirm the engine model, CPL, engine serial number, removed liner part number and physical dimensions.

The key checks include bore size, total length, flange area, O-ring groove position and old liner condition. For QSM11, ISM11, M11 and L10 rebuilds, the engine nameplate is more reliable than the equipment category alone.

If the old liner is available, send photos of the liner, O-ring grooves, part number marks and measurement points before shipment. Topvelsun can help compare the supplied information before order confirmation.

Installation Notes for Wet Cylinder Liners

Clean the cylinder block liner bore, counterbore and O-ring sealing area before installation. Rust, scale, burrs, cavitation marks or old seal residue can damage the new O-rings and cause coolant leakage after assembly.

Check liner protrusion according to the engine service manual. Incorrect protrusion or uneven seating can affect fire ring loading, cylinder head gasket life and combustion sealing.

Use the correct O-rings and approved installation lubricant. Do not force the liner into a dirty or damaged block bore. If resistance is abnormal, stop and check the liner size, O-ring position and block condition.

After rebuild, monitor coolant level, oil condition, crankcase pressure, exhaust smoke and operating temperature. Early checks can help prevent repeated liner, piston and gasket failure.

Why Source 3803703 3080760 from Topvelsun?

Topvelsun supplies replacement engine parts for heavy equipment, trucks, generator sets, marine and industrial engine maintenance. For Cummins M11-family liner orders, we help buyers check part number, engine reference and key dimensions before shipment.

This product is suitable for repair workshops, fleet maintenance teams, engine rebuilders, parts distributors and overseas buyers working on Cummins M11 ISM QSM11 L10 engine service.

FAQ

Are 3803703 and 3080760 used for the same liner group?

Yes. 3803703 and 3080760 are commonly listed together for Cummins M11-family cylinder liner applications. Final fitment should still be verified by CPL, engine serial number and removed liner dimensions.

What engines can this cylinder liner fit?

This liner is commonly associated with Cummins M11, ISM, QSM11 and L10 engine references. The exact fitment should be confirmed by engine serial number, CPL and old liner dimensions.

Is this liner only for excavators?

No. Cummins M11-family engines are used in heavy-duty trucks, construction machinery, generator sets, marine and industrial equipment. The engine configuration is more important than the machine category.

What dimensions should be checked before ordering?

Check the 125 mm bore reference, total length, flange area, O-ring groove position and old liner condition. Measuring the removed liner is the safest method before ordering.

Can Topvelsun help verify the correct liner before shipment?

Yes. Buyers can send the engine nameplate, CPL, old liner photos and measurement photos. Topvelsun can help compare the information before order confirmation.