When the head is returned from the workshop, valves with related components will already be installed in it. In this case, you should omit the procedures of the next five paragraphs and proceed directly to the actions described in paragraph 7.
1. Install the valve spring seats on the valve guides first (see accompanying illustration).
Attention! Stop tapping the cap as soon as it is completely "sit down" on the hub - further impacts may damage the rubber. Make sure that the caps are not twisted on the bushings.
2. Put a new oil seal on each of the guide bushings. Oil seals (intake and exhaust valves) "planted" onto their guide bushings by tapping gently.
Note. The valve stem seals for the intake and exhaust valves differ in size and are marked with a color code (see accompanying illustration) - do not confuse them.
3. Working from one end of the head to the other, lubricate the first valve with molybdenum or engine assembly grease and seat it in the head. Lubricate the valve stem with clean engine oil.
4. Put the valve springs and their plate on the rod (see accompanying illustration). Using a special tool, compress the springs by lowering the plate, then install the crackers of the split lock into the opened groove on the valve stem.
Note. Valve springs are installed in coils with a reduced pitch to the head.
5. In order to temporarily fix the crackers before releasing the tool, lubricate them from the inside with a thick lubricant (see accompanying illustration). 6. Repeat the procedure for the remaining valves. Make sure that all components are installed strictly in their original places.
7. Using a vernier caliper, check the installation height of the valve stems (distance from the seat of the springs to the end surface of the valve stem) (see accompanying illustration). If the head was repaired in a car service workshop, this parameter will already be adjusted properly. If the result of any of the measurements exceeds the allowable Specifications value, replace the corresponding valve and recheck. If replacing the valve does not correct the situation, then the valve seat is too deep into the head and the latter must be replaced.
8. Lubricate the working surfaces of the rocker arms of the valve drive, cams and camshaft journals with assembly motor grease (ov) and rocker axles. Install the camshaft in the head (s) and rocker assembly (see part Engine repair without removal from the car - Civic models this Chapter).