Postby SHAWNATGERBROCK » Mon Feb 11, 2008 12:51 pm
Yea, dont worry about them ... they will usualy last the life of the vehicle ... unless you never change oil ... My Altima had 190K and had never been done ... I checked them once around 170K when I replaced my valve cover and they were fine .... I did have to do them on my Race motor , only because I had regrind cams .... it was a SERIOUS pain in the butt !!! Special tools, mathematical Calculations , having to remove cams to get the shims out ... arg ... then paying $10 per shim and having to wait a week to special order them ....