Thread: TD5 vibration 2500-3500 rpm

I have been trying to solve similar issue to this. Mine is the same in that its at the same revs all the time 2500-3000 and then clears up. The only difference is that it has been known to disappear totally- only for a very short time, ten minutes or an hour.

My HB is not perfect when at idle. The pulley has no movement at idle but I can move it slightly by hand (1mm) but the HB is solid.

It feels to me like my vibration has weight to it, not a buzz or a rattle. The engine has heaps of power. Only other issue is a **** idle when cold, dont think they are related

Then it might be the flywheel, what symptoms do these present when buggered?

Have you had time to see if removing the HB has sorted yours for good. I would like to know how you have got on. Cheers

Graeme,
Have a look at your engine mounts, i had the same type of promlem with lots of noise and vibration replaced the mounts and the car is very quirt. I keep thing something is wrong so quirt.
Tye.

This is in a 110. Are the engine mounts the same for a defender and disco? What is yours

My defender does exactly the same thing, at 2700 to 3000 and above it sounds like it's about to blow up it scares the hell out of me. I never rev it past 3000 rpm due to the sound that it makes. Graheme did you find the source was it the balancer or not???

I have read hundreds of post on this topic. Most never fully get to the bottom of the issue and many comments along the way from other keenly interested enthusiasts wanting a solution also. Money has been thrown all over the show and not everyone getting solutions. Most though have not replaced the balancer.

Mine still has the HB removed. The bad drone/vibration was eventually tracked down to the bellows-type exhaust flex vibrating on its internal limit-stop, after having replaced both engine mounts, exhaust hangers and the main muffler without any improvement. The HB was refitted after changing the flex joint but re-introduced some drone. I feel that the engine may be not particularly well balanced and suspect the flywheel might be the cuplrit and that the inbalance has caused the HB rubber to distort permanently after trying for too long to do its job.

I so far have resisted the temptation to throw loads of money at this issue. There are lots of potential problems but it seems to me that it comes down to a general balance problem. If it were an injector, bad fuel buggered sensor etc then it should not improve with more revs, balance issues nearly always do. All things have a resonant frequency, a frequency when they will shake and drone, then if the frequency or speed is raised they disappear. This engine has a harmonic or resonant speed and its right about 2500. Even a tyre wobbling cos it chucked a weight usually comes right if you go fast enough. My props on the 90 were very specific about what speed they would shake so I just drove faster, nice and smooth, problem solved - I did put a D2 prop on it in the end.
The exhaust and engine mounts will contribute to a resonance so it fits that they have helped. I have done the flexi pipe and general overhaul of the exhaust but to no avail. It seems that even Land Rover knows this engine is prone to this charachteristic and have no specific cure either.

I will remove the HB myself and see if that helps. Then I guess its the flywheel. Its alot of coin to throw at a maybe through....You first ;-)

Originally Posted by nzlandies

I will remove the HB myself and see if that helps. Then I guess its the flywheel. Its alot of coin to throw at a maybe through....You first ;-)

Hi

I have a 300Tdi, which has developed a very similar vibration to what you describe. at just under 2000rpm there is a very deep vibration/noise (more noise than feel, but must be caused by vibration somewhere). It is not drive-train related - it happens at rest, in any gear, 2WD/4WD, h'brake on/off etc etc. it started about 6-8mths ago, is slightly worse than when it first started, but not deteriorating... I've had the exhaust checked over, and the flex joint 'seems' ok. So, it must be the engine...

My disco is manual, and has only 128k kms on the clock...

I'd come to the conclusion it was the HB - but would appreciate thoughts.
If it was the engine mounts, what would I be looking for/how to check?

Puzzled, and just about to start spending money on fixing it, so want to mimimise the damage!!!