A damp area near a seal is a clue, but first locate where the fluid begins. This Shangchai listing identifies water-seal reference 7N8018 without stating dimensions, material or a specific location. Confirm the component application from the engine serial and catalogue.

Separate a seal leak from nearby joints

Clean the area and inspect the assembly after it has cooled and been made safe. Look for the first point where coolant appears, then check nearby hose joints, covers and drain passages before removing anything. Record the leak location and take photos that show the surrounding component, not only the seal.

After removal, compare the seal profile and orientation with the replacement. Inspect the shaft contact surface and housing seat for wear, corrosion or damage. A new seal may continue to leak if the mating surface is scored. The page does not specify a material, lubricant or installation depth, so use the repair instructions for the exact assembly.

Information that helps confirm 7N8018

Send the engine plate, serial, old-seal number and images of the removed seal and housing. Confirm package contents and any companion parts before dispatch. The separate 9Y1798 water-seal listing carries a different reference and should not be treated as interchangeable.

FAQ

Does 7N8018 include the housing?

The listing describes a water seal, not a housing. Confirm the supplied item with the seller.

Can I install it without checking the shaft?

Inspect the shaft contact surface first; damage there can defeat a new seal.

What if the leak source is unclear?

Clean and inspect the cooled assembly safely before identifying the failed joint.