Its not hard to do with a little practice if you dont mind a little oil splash. There was a marked power increase in my 550 and 750 Honda 4's between "factory" procedure and setting them hot. My hands are tired and I'm going to bed now.Įxactly, except when I mention " while running," it is with a feeler gauge. I have revived several Hondas that were low on compression and given up for dead, simply by loosening up the vavle clearances because it had never been done. As the valve faces wear, the face seats further in the head, which moves the stem up toward the rocker arm, creating a tighter clearance. If you don't know when it's been done last, it's time to do it now. Then it's time for a valve job.Īs far as when to adjust them, a good maintanance schedule is the best way. This normally happens to the exhaust valve. If a valve is set too tight and hangs open, even slightly, the motor will lose compression and the valve could "burn" (they heat up and the metal of the valve face actually burns away). If you are unsure, it is better to be on the safe side and leave them looser rather than tighter. By leaving some looseness, there is room for thermal expansion and such. The clearance specs set by the manufacturer are the numbers that the engineers came up with to meet these criteria. The object, when adjusting valve clearances, is to obtain as little clearance as possible, while ensuring that the valve will not be held open at all. When Geek says do it while running, he's not talking about using a feeler gauge, he's doing it "freehand".
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |