3907792 3802370 Cylinder Liner for Cummins 6CT 6CTA 8.3L Engine

3907792 / 3802370 Cylinder Liner for Cummins 6CT / 6CTA 8.3L Engine

The 3907792 / 3802370 cylinder liner is used for Cummins 6CT / 6CTA 8.3L wet sleeve engine rebuilds. It is commonly selected when the original liner shows bore wear, cavitation marks, coolant leakage, piston scuffing, low compression or sealing failure during engine overhaul.

This page is focused on the 3907792 / 3802370 liner group only. Other 6CT liner references may look similar, but flange size, liner height, O-ring position and engine configuration should be checked before ordering.

Identification Data for 3907792 / 3802370

Why This 6CT Liner Should Be Checked Separately

Cummins 6CT-family engines have more than one liner reference in the aftermarket. The 3907792 / 3802370 group is generally associated with a 114 mm bore and 133 mm flange reference. Similar-looking 6CT liners should not be mixed unless the dimensions and engine configuration are confirmed.

For this reason, buyers should not order by the engine name alone. CPL, engine serial number, old liner sample, flange diameter, liner height and O-ring groove position should be checked together.

This is especially important for rebuilt engines, imported used machines and fleet engines with unknown repair history. Previous machining, mixed parts or old stock replacement may change the correct liner selection.

Typical Repair Situations

Application Coverage for Cummins 6CT 8.3L Engines

The 3907792 / 3802370 liner can be used as a reference for Cummins 6CT / 6CTA 8.3L engine rebuilds across different equipment types. It should not be described only as an excavator part.

Typical application fields include construction machinery, trucks, buses, generator sets, agricultural machines and stationary industrial engines. The correct selection should be based on the engine configuration rather than the equipment category alone.

For overseas buyers, sending the old liner photos and dimension measurements before shipment is the safest way to reduce wrong-part risk.

Pre-Order Verification Checklist

Before ordering 3907792 / 3802370, confirm the complete engine model, CPL, engine serial number, removed liner number and physical dimensions.

The key dimensions include bore, flange diameter, total height, flange thickness, lower sealing area and O-ring groove position. If the engine has been rebuilt before, the removed liner should be measured directly.

If the old liner is missing, provide the engine block bore measurement, rebuild history and engine nameplate photos for checking 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, old seal residue, burrs or cavitation pits may damage the new sealing rings and cause coolant leakage.

Check liner protrusion and seating contact according to the engine service manual. Uneven liner height may affect combustion sealing and head gasket life.

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

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

Why Source 3907792 / 3802370 from Topvelsun?

Topvelsun supplies replacement engine parts for heavy equipment, generator sets, industrial engines and fleet maintenance projects. For Cummins 6CT liner orders, we help buyers compare part number information, engine references and key dimensions before shipment.

This product is suitable for repair workshops, engine rebuilders, fleet maintenance teams, parts distributors and overseas buyers working on Cummins 6CT / 6CTA 8.3L engine service.

FAQ

Are 3907792 and 3802370 used for the same 6CT liner group?

Yes. 3907792 and 3802370 are commonly listed together for Cummins 6CT / 6CTA 8.3L cylinder liner applications. Final fitment should still be verified by CPL, engine serial number and liner dimensions.

Should 3919937 stay on this product page?

No. 3919937 is better handled on a separate 6CT liner page with its own reference group. Keeping it on this page may mix two similar but different liner references and weaken the search intent of this product page.

What dimensions should be checked before ordering?

Check the 114 mm bore reference, 133 mm flange reference, total height, flange thickness and O-ring groove position. Measuring the removed liner is the safest method.

Is this liner only for excavators?

No. Cummins 6CT / 6CTA 8.3L engines are used in construction machinery, trucks, buses, generator sets, agricultural machines and industrial engines. Engine configuration is more important than machine category.

Can Topvelsun help check the correct liner before shipment?

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