2002 Durango rocker arms

2002 DODGE DURANGO
104,000 MILES • V8 • 4WD • AUTOMATIC
Avatar
PNESS1
  • MEMBER
  • 2 POSTS
2002 Durango 4.7L OHV Motor. Mileage at 104k. Vehicle backfires when first started, poor power, valve train noise. I pulled the valve covers and saw that 2 rocker arms fell off, FELL OFF! Is this common for this motor? Dealer had no tech service bulletins. Valve springs all intact, don't know how to test spring pressure with heads installed. I replaced the lifters aka "valve lash adjusters" and now vehicle is repeating these symptoms. Any suggestions?
Dec 13, 2010 at 1:51 AM
Advertisement
Avatar
MHPAUTOS
  • ✓ASE Certified Mechanic
  • 31,937 POSTS
  • ASE Certified Mechanic
You may have to get a cam lift height measured, you may have a lode worn off the cam, valve springs can only be measured off the engine, start with the basic tune, a backfire will be a vacuum leak, a lean mixture or a faulty lead, are there any set codes? do a scan not all codes set a MIL, start here.

mark (mhpautos)
Dec 13, 2010 at 9:50 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.