Loud noise at low idle only

1995 VOLKSWAGEN JETTA
150,000 MILES • 2.0L • 4 CYL • 2WD • AUTOMATIC
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SHANE HANSEN
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  • 1 POST
Loud tapping or knocking at low idle only when under load or moving idle above 1500-2000. no noise and no loss of power either way.
Dec 5, 2017 at 4:08 PM
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MHPAUTOS
  • ✓ASE Certified Mechanic
  • 31,937 POSTS
  • ASE Certified Mechanic
Tapping noise may be a failed lash adjuster, sometimes they will come good if they are just sticky with gum and carbon, first try adding a quality engine flush (read and understand instruction on flush)and do a filter and oil change, if this does not help you will have to replace the failed adjuster, also do an oil pressure test as well, test cold idle, hot idle and hot 1500rpm, post readings for evaluation.
Dec 6, 2017 at 2:26 AM
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