Quote:
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.
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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.