Engine vibration - Corolla Toyota Cars & Trucks

Vibration and shudder in a newly rebuilt engine can be caused by improper assembly, mass imbalance, camshaft misalignment, improperly adjusted exhaust pipes, or improperly adjusted carburetors or injectors. It is recommended that the engine be inspected by a professional mechanic to determine the exact cause of the problem and to correct it.
The causes are:
Improper mounting: If the engine mounting bolts are not tightened properly or are damaged, it can cause vibration. Similarly, an improperly installed motor mount can also cause vibration.
Ground imbalance: If the motor parts are not balanced properly, it can cause vibration when the motor is running.
Camshaft misalignment: Incorrect alignment of the camshaft can cause vibration when the valves and pistons collide.
Improperly adjusted exhaust pipes: Improperly installed exhaust pipes can touch other engine components and cause vibration.
Improperly adjusted carburetors or injectors: If the carburetors or injectors are not adjusted properly, it can cause vibration in the engine.

The symptoms you're describing with your 2KD Hilux engine (weak engine with mass smoke, vibrations on rev, and less power) could be caused by several different issues. Here are a few possibilities:

1. Excessive engine oil consumption: If the engine is consuming too much oil, it could be burning the oil and creating a lot of smoke. This could be due to worn engine components such as pistons, rings or valve seals.
2. Clogged air filter: A clogged air filter can restrict the airflow to the engine, causing it to run poorly and produce more smoke.
3. Timing issues: If the timing is off on the engine, it can cause poor performance, vibrations and smoke.
4. Fuel injection system issues: A malfunctioning fuel injection system can cause poor engine performance, vibrations and smoke.
5. Turbocharger problems: A malfunctioning turbocharger can also cause vibrations, smoke and less power.

This is common on Hondas. If you want the vibration to go away you can adjust the idle to be higher. That's a fairly common fix. There's not really anything wrong though as long as it's not missing. Every engine has a speed it likes to vibrate at depending on how it was designed/built.

what about a crank pulley,or any other pulley bear a bend damage and on rotation cause the vibration?

Worn engine mounts that have gotten heat hardened from the engine heat will cause vibration at idle in drive.

With 180k I would change the engine mounts. They are about the only thing that would dampen engine vibration and noise (assuming that the engine is running ok). There is likely one or all weak or broken. Normally when you have a vibration at speed then it is going to be driveline or wheel balance.

Replace balancer. You don't notice them until you rev it up.

Increased vibration from a vehicle indicates worn out engine supports. This vibration often disappears when revving the engine high, but is very noticeable at low revs.

You can have these inspected and possibly replaced to reduce the vibration cominf from your engine.

Hope this helps.

check the motor mounts

Engine vibration is the cause of this issue, it is the biggest complaint from many owners, changing the engine mounts will help, as mounts age the rubber gets hard and they don't absorb vibration like they should, new mounts help issue, but it will no stop it altogether. A faulty MAF will not cause vibration, just a hesitation on acceleration at times