1986 S10 Daily Driver Rollover Rebuild

[Bigdually]

Originally Posted by Katrina/10

I have an 85 S15, 2.5 Duke with 700 trans and factory air. I bought a bunch of parts from Rock Auto and put it back on the road. It runs pretty good, but the engine has a rattle at low RPM. May be a bad piston, but I guess I'll run it till it dies.

The 2.5 is not a quiet motor. It's got a lot of things that make it noisy, mainly the valvetrain due to the fiber timing gear wearing and causing noise. Mines fairly quiet, but I had to have the head shaved to true it up when I did the head gasket and bolts a good while back. Under load the valves will chatter on low grade gasoline, if I use midgrade I never hear them.