After changing all the suspension components front and back, my car
now will have a loud "bang" after going over a hump or a large poth
hole. It sounded as if the absorber is being stretched to the max and
knock at the end of the travel. How is the possible? I'm using a set
of brand new Bilstein HD. Ive check and can confirm that the absorber
is of the right specification. Before the suspension job, the bang
comes from the left front. After those extensive work, both front and
rear is making the bang.

here is the items i ve changed: all done at the same time by the same shop.

Tie Rods
Drag Link
Front and Rear Absorbers
Rear Spring
Front and Rear Spring Buffer (4 dots for front and 3 dots for rear)
Upper Control Arm
Lower Ball Joint
Guide Rod Mount
Guide Rod-Lower Control Arm Mount
Idler Arm Repair Kit
Lower Control Arm Bushes
Steering Absorber
Rear Sub Frame Mount
Rear Trailing Arm Bushes
Rear Differential Mount
Front Sway Bar Bushes
Rear Sway Bar Bushes
Rear Sway Bar Link

It sounds like someone else has done this work - if so take the car back.

You might want to take a quick look at the ends of the springs though and see if they are seated in their recesses properly.

__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!

Look in the Wikka and compare the pics to your car. There are few excellent "how-to's" with detailed pics of many of the parts you describe.

If something looks amiss, post a photo here for some additional info, then take the car back to get it fixed correctly.

That's a lot of work to have a car with a bad suspension.

I brought the car back to the workshop but even they can't find out what is the problem. The spring is seated properly and everything is fitted properly.

Where are you? Maybe we can recommend you a good shop to go to? I would be very upset if I were you.

__________________
1985 300D (CA, 173K)

Dynamite Biodiesel Co-op, Phoenix,AZ

Bummer...

If you can't see the problem by comparing how your car looks to how it does in the photos on this forum I think it might be worth your while posting some photographs of your own. May be someone here can spot the problem.

One thing that sometimes happens is that new ball joints aren't greased up - they will knock, but you're only really gonna have that problem on the front.

Another thing on the front is that when the steering box is loose it clunks too.

BUT if I were you I wouldn't mention this to the place where you got the work done - you don't want them fiddling with your car anymore.

EDIT take a look at this thread too:-

http://www.peachparts.com/shopforum/showthread.php?t=296022

__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!