Shandong Shengyue Technology Development Co.,Ltd is one of the most professional weichai wp4.1 engine cylinder head cover assembly 1000971546 manufacturers and suppliers in China. Please feel free to buy high quality genuine auto parts at competitive price from our factory.
WEICHAI WP4.1 ENGINE Cylinder head cover assembly 1000971546
Complete Set of OEM Assembly Components
1001217649: Cylinder head cover gasket (critical replacement item; ensures a vital seal to prevent oil leakage from the top).
1000096260: Oil filler cap assembly (cap for the oil filler opening on the valve cover).
2102040167: Exhaust bypass pipe (line connecting to the exhaust valve/oil-air separation system).
1001080010 / 1001247914: Clamping spacer/pad.
1000969911: Hex cap nut (used for primary top-side clamping/fastening).
1000969912: Combination sealing washer (used with the cap nut to prevent oil seepage at the bolt hole).
90011420036: Hex flange bolt.
90003989301: Heavy-duty clamp (used to secure the exhaust bypass pipe).
Common Replacement Scenarios and Daily Maintenance Tips
1. Cracking or deformation of plastic/die-cast components: Exposure to extreme engine heat or uneven bolt tightening torque during installation can easily cause the cover to warp slightly or develop hairline cracks, leading to severe oil leakage from the top of the engine.
2. Oil-air separator blockage (black smoke/rapid oil consumption): The cylinder head cover assembly integrates a crankcase ventilation valve (PCV valve). Failure to perform timely maintenance or the use of low-quality engine oil can cause the internal filter mesh or one-way valve to become clogged with sludge. This leads to excessive crankcase pressure, resulting in oil burning, blue exhaust smoke, or even the oil dipstick being forced out.
3. Installation precautions: When installing the new part, do not blindly tighten the surrounding mounting bolts (such as flange bolts like 90011420036) using an impact wrench; doing so can cause uneven stress, leading to deformation or cracking of the cover.
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