I have a 97 Trooper 3.2 SOHC I recently bought with engine problems. I had a mechanic friend come with an engine "stethascope". After listening to motor run he thinks its lifter noise. Can they be adjusted?. Thanks. Steve

nope they are just dirty. search for lifters here.

1. Gunk (or other brand) Motor Flush. Other very similar products are Berryman's B-12 or just pure Kerosene.
2. Diesel Fuel mixed with the old oil, run through the motor, then an oil change.
3. Switch to Mobil 1 or Valvoline synthetic.
4. 1 can of HP restore with an oil change
5. Replace 1 qt. of Oil with Transmission Fluid after an oil change to clean system.
6. 1 can of "Sea Foam" (a marine additive) with an oil change
7. Change oil w/ 0w30, rev to 2500 rpm for 30 minutes, change oil again with recommended weight (this is what the dealer will do if you come to them with this problem)
8. Have the motor flushed with Bilstein's motor flush machine. http://www.motorlife.com/
9. Remove the lifters, bleed them and re-prime them
10. Replace the lifters altogether.