Thread: The ultimate solution to Td5 vibration / knocking

lol at people that have a fine car like this, get some small niggling problems, fix them all and end up with a great car, and then sell it " incase " something else " might " happen. oh well, means someone else deserving will get a fine car

so, on the track of vibrations, i have been chasing mine for quite some time. i replaced both engine mounts about 18 months back and it seemed good for a short while and i never really got around to nutting it all out.
well, i figured i might have a problem with one of the mounts........
turns out 1 of the mounts i didnt have a problem with, but all 3 others i did, 1 engine and 2 gearbox mounts.

all appears normal here. checked the engine mount from below with a pen in the inspection hole it it seemed ok from there. off with it anyhow.


hmmmm, are these mounts supposed to be 2 peice, not according to the new ones i had in packets ready to fit.


guess what. its as smooth as now
still a bit of harshness around 2200rpm, but its 99% better than it was yesterday, no surprise looking at those mounts.
not sure if the gearbox mount or mounts may have been broken all along, and that has caused premature failure of the engine mount at only 18 months, or whether the engine mount was a dud and that has caused the gearbox mounts to explode.

needless to say, check your gearbox mounts as well as engine mounts.

Originally Posted by Rosscoe68

so, on the track of vibrations, i have been chasing mine for quite some time. i replaced both engine mounts about 18 months back and it seemed good for a short while and i never really got around to nutting it all out.
well, i figured i might have a problem with one of the mounts........
turns out 1 of the mounts i didnt have a problem with, but all 3 others i did, 1 engine and 2 gearbox mounts.

all appears normal here. checked the engine mount from below with a pen in the inspection hole it it seemed ok from there. off with it anyhow.


hmmmm, are these mounts supposed to be 2 peice, not according to the new ones i had in packets ready to fit.


guess what. its as smooth as now
still a bit of harshness around 2200rpm, but its 99% better than it was yesterday, no surprise looking at those mounts.
not sure if the gearbox mount or mounts may have been broken all along, and that has caused premature failure of the engine mount at only 18 months, or whether the engine mount was a dud and that has caused the gearbox mounts to explode.

needless to say, check your gearbox mounts as well as engine mounts.

So how do you inspect the gearbox mounts? Do you have to remove them or can they be inspected in situ?

i would say take em out, only bout 1/2 hour job for both, quite easy to get to. engine mounts not so easy

My recently acquired 99 D2 TD5 has a rumble in the engine which goes through the whole drive line from 2000 - 2250rpm.
It starts perfect from cold/hot and accelerates smoothly except in this rev range

You can feel this in neutral and revving within these rpms and ive been through the drive train, all fine
I cant find anything that looks wrong but to me seems a balancing problem with the engine around those RPM's
Obviously these vehicles didn't do this from new, just a thought being a 5 cylinder and imagine a tad harder to balance, after 10 or more yrs could the harmonic balancer get out of wack.
anyone tried a new balancer with similar symptoms to mine?

Originally Posted by roverv8

My recently acquired 99 D2 TD5 has a rumble in the engine which goes through the whole drive line from 2000 - 2250rpm.
It starts perfect from cold/hot and accelerates smoothly except in this rev range

You can feel this in neutral and revving within these rpms and ive been through the drive train, all fine
I cant find anything that looks wrong but to me seems a balancing problem with the engine around those RPM's
Obviously these vehicles didn't do this from new, just a thought being a 5 cylinder and imagine a tad harder to balance, after 10 or more yrs could the harmonic balancer get out of wack.
anyone tried a new balancer with similar symptoms to mine?

This whole vibration thng is a bit of a mystery.

My 2001 model had it and I tried to get LR to fix it and they eventually concluded that it was just an unwanted characteristic of the engine (along the lines of your point about 5 cylinders) I used to have a Passat 5 cylinder many years ago and that was not the smoothest engine either.

My 2004 Disco was much better new - very minor vibration at the rpms you mention but, it has since got worse (147K). I have not changed the harmonic balancer but perhaps you have a point,

Originally Posted by roverv8

My recently acquired 99 D2 TD5 has a rumble in the engine which goes through the whole drive line from 2000 - 2250rpm.
It starts perfect from cold/hot and accelerates smoothly except in this rev range

You can feel this in neutral and revving within these rpms and ive been through the drive train, all fine
I cant find anything that looks wrong but to me seems a balancing problem with the engine around those RPM's
Obviously these vehicles didn't do this from new, just a thought being a 5 cylinder and imagine a tad harder to balance, after 10 or more yrs could the harmonic balancer get out of wack.
anyone tried a new balancer with similar symptoms to mine?

You can always search a long thread like this for keywords using the "Search This Thread" item at the top of the first post on the page.

There are 14 responses containing the word "harmonic" posted like the one below.

http://www.aulro.com/afvb/discovery-...ic#post1410144

Originally Posted by OffTrack

You can always search a long thread like this for keywords using the "Search This Thread" item at the top of the first post on the page.

There are 14 responses containing the word "harmonic" posted like the one below.

http://www.aulro.com/afvb/discovery-...ic#post1410144

thanx , ive read the thread from start to current,
established the fact that many different vib/rubble issues on here caused by various different reasons.
Ive pin pointed my rubble from the engine at a specific RPM range.
As stated, the TD5 engine didn't do it from new, so something must be getting out of whack the more the engine is used.
If i had a spare grand i'd try a brand new harmonic balancer,
Many people on here spend lots of $$ bux with process and elimnation, and still not 100% satisfied, i suppose why this thread goes for so long!