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Grind the valves

Question : Recently I sent my Honda Accord CA5 for a compression check, and the result showed that it had dropped from 150 bar to 100 bar. The mechanic told me to grind the valves to get back the original compression. What are the parts involved in the procedure, and how long will it last once I grind the valves?

Answer : I wonder if the compression check was done correctly and how the mechanic diagnosed that the valves needed to be reseated. If he did a dry and wet compression test and found that there was no change in the compression pressure both times, then it is possible that the valves need reseating.

If it is only a valve reseating exercise, then what you need is a top overhaul kit that would also comprise a cylinder head gasket, valve seals and valve cover gasket. The rest of the cost would be labor.

 
 

Dry or wet test

Drop in compression

Wet and dry compression

Grind the valves

Compression test

 

 

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