How do you replace intake valves?

Answer 1

when replacing any valves i.e. exhaust or inlet the cylinder head must first be removed. this is quite a big job on most cars as it involves removal of timing belt/chain and stripping of cams. the valves themselves take around ten mins to remove, replace and grind in. to remove the valve the valve spring must first be compressed with either correct tool or i find a deep socket and hammer works fine. when this is done the collets that hold the valve will fall out of place and the valve can then be pulled out from the combustion side of the head. its also best to change the valve stem oil seal too when doing this. not sure what car it is but some vehicles require all valves on that side to be changed and use of specialist greases. to replace just push the new valve into the new seal and use grinding paste coarse first then fine to seat the valve in the head. now compress the spring (this time with correct tool) and with a screw driver position collets on stem. this is a major pain in the #### but a small screwdriver with grease on the end holds them mint. then release the spring and the valve should stay in place. best to check by lightly tapping spring to verify collets are corectly placed.