Vibration ,engine or ?
 

I changed the motor mounts and the front flex disc. I removed the trans mount and it looked good so i put it back. The rear flex disc is ok. I did valve a adjustment. So far as i could tell the drive shaft support looked good seemed to me to be solid, but I'm not that farmiliar with this. Tie rods were replaced. I increased the idle speed with the idle screw. still it vibrates like the mounts or trans mount were bad. Could it be something with the Injection pump. ANY HELP AT ALL IS APPRECIATED. RAY M

Car please.

As often as I've been here I should know better to start with the car 1980 300 d
Thanks for the heads up. Ray

This is a car i got 2 months ago.Is it possible that he may have removed the axle and did not mark it to replace it in the correct alignment. Ray M

Is there a rack damper bolt on this model in1980? 300d

If shaking, during idle, you won't be able to tell if the drive shaft was installed incorrectly. I would adjust idle back to 750 rpm, this is not the problem, does it smooth out at a higher rpm?

It doesn't smooth out at a higher rpm. I'm stumped.

Have you cracked the fuel lines at each injector to see if there's any difference? May isolate an offending cylinder.

Sounds exactly like a rack damper bolt. I'm not sure if this car has it but I believe it does...

RD bolts on turbos only, and it smooths out above 1000 rpm.

i'LL TRY THIS OVER THE WEEKEND tHANKS RAY M

Could be a bad injector, could be low compression on one cylinder. Does you car have engine shocks. Those may help a little.


BTW, you seem to type with all caps a lots, can I ask why?

IS THIS TYPING WITH ALL CAPS?

OR IS THIS TYPING WITH ALL CAPS?

Both, or Both

I replaced the engine shocks,motor mounts Front flex disc and checked the trans mount.

If you cant tell you have a serious problem worrying about unnecessary trivial social notions that you have no worldly notion about. THANKS FOR POINTING OUT THE POINT THAT I HAD MY CAPS ON AND DIDN'T THINK ANY ONE WITH UNDERSTANDING WOULD BOTHER WITH. YOU ARE VERY PROPER EMILY POST.

I apologize AHM (in all caps as you have it) I clicked on your name AHM , viewed all of your post and I saw the same sinicisim in most of them. You must be a funny guy.

I don't pay attention to caps or not. No intention to offend though. Why would this be a question for you to ask. Someone esle had some remarks to the same fact. Does it offend some of the sensative. Please let me know. I usually for get my caps when typing. does this offend any one . Please let me know. My conversations are meant to be pleasant. RAY M

A cylinder with low compression will make it shake... especially noticable at idle.

Have you had a five cylinder engine before? They all hop up and down at idle. Completely normal for the unnatural five inline design.

Tom W

It doesn't bother me I just wondered why. Each to their own.

I would try cracking open each injector line individually at idle and see if one injector doesn't change the roughness at all or less than the others. And if that doesn't reveal anything they you might test the compression.

You could also try settling the mounts. To do this loosen the bolts on the motor and trans mounts then start the car and let it run for a little bit, maybe rev the engine a couple of times. Then shut the car off and retighten all the bolts.

I asked because caps is usually associated with yelling, especially when you use size 7 font.