I have a 95 GMC k1500 with a 5.7 L and I can hear a steady clicking sound. It is hardly noticeable when the truck is cold but after about a 30 min trip I can definitely hear it from in the cab and is very predominate when I listen by the intake. The truck also seems to be lacking power until I get it really warmed up. With a 500 lb load in the box I have a hard time to keep the truck in overdrive while driving at 110 km/hr. Once warmed (30 mins or so driving time) I have no problem keeping it in overdrive. We thought it might be one of the hydraulic lifters broken and banging away but after pulling the valve covers off and checking for some play on the rocker arms I found none. Any more ideas? I am mostly wondering if this will be harmful to my engine. There is about 150000km on the engine and I run synthetic oil. Thanks
- posted
19 years ago