1985 BMW 535i Car makes a thump when the clutch is released

1985 BMW 535I
Avatar
JIMIG
  • MEMBER
  • 1 POST
Drive Train Axles Bearings problem
1985 BMW 535i 6 cyl Two Wheel Drive Manual 200K miles

When changing gears if the clutch is released quikly there is a loud thump in the rear of the car. If I release the cluthc smoothly no sound. My question is...would this be drive shaft related or axle related? And how do I check which is bad? Second problem is the car idles fine at 800 rpms; however, when the accelerator is pressed the car chokes out. I have replaced the fuel filter but no change. Is there anyay to determine which pump or relay is bad? Also, the fuel issue is spordic.
Nov 5, 2009 at 4:12 PM
Advertisement
Avatar
DOCHAGERTY
  • ✓ASE Certified Mechanic
  • 9,606 POSTS
  • ASE Certified Mechanic
The noise is possibly the sub-frame bushings, inspect for broken bushings and/or the differential mount too. As to the running issue, start with checking the valve lash, plug gap, throttle plate position, and general state of tune.
Nov 6, 2009 at 8:32 AM
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.