Genuine Mazda 626 Intake Valve

Mazda 626 Intake Valve Parts and Q&A

• Intake Valve
  F20212111
  Q: Should servicing the intake valve, valve seats, and valve guides be left to a professional on Mazda 626?

  A:

  Due to the complicated nature of the task and the unique tools and equipment required, having a professional perform the task is preferable to work on the valves, valve seats and valve guides, otherwise called a valve job. The home mechanic is able to remove the head, disassemble it, carry out the initial cleaning and inspection, and after that assemble the head and hand it over to a dealer service department or an automotive machine shop where the actual servicing of the valve is done. The dealer service department or automotive machine shop will strip the valves and springs off, rework or change the valves and valve seats, rework the valve guides, check and change the valve springs, spring retainers and keepers, install the new valve seals, make sure that the installed spring height is correct, and reassemble the valves associated with the valve. Cylinder head gasket surface will also be resurfaced in case it is warped. Once the procedure of the valve job is done by a specialist, the head will be in a state of a like-new one. On returning the head, it should also be cleaned again before being installed on the engine to remove the last traces of any metal particles and abrasive grit that might still exist, as a result of the valve service operation or head resurfacing operation, using compressed air where possible to blow out all the oil holes and passages.
• Intake Valve
  F801-12-111A
  Q: How to remove and reinstall the Intake Valve, Valve Spring and Valve Stem Oil Seal on Mazda 626?

  A:

  The removal of the Rocker Arm assembly would begin with the removal of the rocker arm assembly then the cylinder head. Then compress the valve springs using a compressor and take out the valve keepers. Once the compressor is released, remove the seat, and springs and remove the valve stem oil seal with pliers. Take out the valves and store them in a numbered rack or a piece of cardboard to be able to install them back correctly. To install, slide the new valve stem oil seals in place in the guides, and fit them with a fit socket and hammer to snugly fit. Apply clean engine oil to the first valve stem and slide it into a guide that is its original, and do the same to the other ones. Lastly, fit the valve springs and seats, where a valve spring compressor is used to fix the keepers, and the cylinder head and rocker arm assembly is then re-fitted.