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tapping sound

Discussion in 'Chevy Trucks' started by medrano75, Feb 6, 2007.

  1. medrano75

    medrano75 Junior Member
    Messages: 2

    i have an 84 silverado thats making a tapping sound from the engine compartment , it happens after the truck has been running for 15- 20 mins.parked or while driving it seems to increase when i press the gas pedal
  2. Sydenstricker Landscaping

    Sydenstricker Landscaping PlowSite Veteran
    Messages: 3,882

    How loud is it? It may be your flywheel is cracked.
  3. carl b

    carl b PlowSite.com Addict
    from Ohio
    Messages: 1,330

    you may look at the idler pulley??? i don't know much about that year but its an idea
  4. DeereFarmer

    DeereFarmer PlowSite Veteran
    Messages: 3,296

    Maybe valves?
  5. derekbroerse

    derekbroerse 2000 Club Member
    Messages: 2,377

    Hard to tell without hearing it.

    Could be lifters out of adjustment or worn out, or exhaust manifolds cracked/leaking... both can show up once the truck is totally warmed up...