Car shaking

[petercz]

What can cause shaking of engine and whole car? most shakes when engine is warm... I have rebuild engine, new hydromounts and everything and I still feel like sitting in the massage chair

[ngoma]

What RPM? Numerous possibilities, let's try to narrow it down.

[petercz]

At idle (about 800rpm), I suspect the IP - it was opened and resealed but maybe some main part in it is worn out or so?

[ngoma]

Shaking at warm idle? What is the idle RPM before it warms up?

When did the problem start?

You will want to perform the troubleshooting routine at idle where you loosen one-by-one the injector line nuts at the injectors and see if any do not lower or worsen the idle. This to find if there is a particular injector, line, valve, distribution valve, cylinder, etc. that is the problem. Do not over-tighten the injector line nuts when closing them up. 25Nm / 18ft-lbs.

DNO SD 1930 nozzles are USA/Canada spec. 180 bar is over spec, why?

It's possible that the IP delivery piston could have been reinstalled 180 deg. out.

[petercz]

yes, cold idle is about 1000rpm (due to cold start device) for a while and then drop to 800

Ok I will check injectors like you said (some friends around have good experience with these nozzle at high pressure (stock is 165bar) for little more top end power)

Problem start some years ago I replaced transmission, then injectors, resealed IP, engine, then rebuild the engine and the problem is still here

[petercz]

So when I loosen injector lines one-by-one (doesn't matter which), idle is worse

It is good when I raise the idle to 1100+ rpm

[Hendo]

Originally Posted by petercz

What can cause shaking of engine and whole car? most shakes when engine is warm... I have rebuild engine, new hydromounts and everything and I still feel like sitting in the massage chair

Don't confuse me with somebody that knows much, but these videos describe what sounds like a similar situation with an older Mercedes diesel.

In this case the culprit was the injectors; your cause may be different.

Take a look at these videos and see what you think. Part one shows the "before" and part 2 shows the "after".

https://www.youtube.com/watch?v=rAOVL3C0dvg

https://www.youtube.com/watch?v=7cdyiy4g930

Anyway, I hope they are of interest.

-Hendo
1982 245 GL Diesel

[petercz]

So guys, it was IP - my mechanic told me probably some regulator inside IP, with another IP it is perfect

[petercz]

Have anyone experience with bad governor (which probably cause this shaking) and repair/replacement?