Genuine Toyota Yaris Cylinder Head

Toyota Yaris Cylinder Head Parts Questions & Answers

• Head Sub-Assembly, Cylinder
  11101-21062
  Q: How Do You Thoroughly Clean and Inspect the Cylinder Head and Valve on Toyota Echo and Toyota Yaris?

  A: First of all, inspect the head for cracks, leakage, and distortion. Check valve seats for damage and replace or recut if needed. Replace worn valve guides and tappet bores. Examine camshaft bearing surfaces and valves for wear and damage. Measure valve stem diameter and replace worn valves. Grind valves into seats using carborundum paste. Check valve springs for damage and replace them if needed.
• Head Sub-Assy, Cylinder
  11101-21061
  Q: How Do You Install a New or Reconditioned Cylinder Head, Including Fitting Coolant Hose Outlet Pipes and Valve Components?

  A: If a new head is being installed and coolant hose outlet pipes are missing, get new ones. Apply adhesive to each pipe's bottom end and press the radiator hose into the cylinder head 15 mm deep, and the bypass hose pipe 18 mm deep. Mark the correct depth on each pipe, then press each in squarely with a hammer and wood block. Reinstall all sixteen valve spring lower seats. Lubricate the valve stem oil seals with engine oil and push them into the cylinder head using a socket. Lubricate the valve stems and insert them, ensuring not to damage the oil seal. Fit the valve springs and upper seats, compress the valve spring and locate the split collets in the valve stem. Repeat for all valves. Tap the end of each valve stem to settle the components. Refit the removed components.
• Head Sub-Assy, Cylinder
  11101-21061
  Q: How to remove the cylinder head?

  A: Begin by draining the cooling system and removing the cylinder head. Take off the plenum, Camshafts, exhaust manifold, and heat shield. Disconnect hoses, plugs, and brackets. Remove the head bolts and washers, then lift off the head. Remove the old gasket and tappets. Clean the head and block, check for warpage. Clean the old bolts and threads. Refit the head, align the dowels and place the new gasket. Tighten the bolts in stages. Follow the reverse steps of removal, ensuring all fasteners are tightened and sealant is cured before starting the engine. Check for leaks after restarting.
• Head Sub-Assembly, Cylinder
  11101-21062
  Q: How to dismantle a cylinder head?

  A: Reconditioned cylinder heads can be more cost-effective for home mechanics than reconditioning the original due to the need for specialized tools. The removal process involves, removing the cylinder head and brackets. Storing removed tappets. Using a valve spring compressor to remove split collets. Lightly tap the tool if the spring upper seat sticks. Removing and deburring the valve through the combustion chamber. Removing valve stem seals with pliers. Storing removed valve spring lower seats with springs.