The ultimate solution to Td5 vibration / knocking

sounds great, I would have a look myself but the access and torque requirements ...

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Originally Posted by Hamish71

with the harmonic balancer done, cant feel them at all

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Thankyou,
so before replacing the harmonic balancer did you have an engine vib/rumble at 2000 - 2250 RPMS

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Originally Posted by roverv8

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!

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Absolutely. And there doesn't seem to be an ultimate answer - some people find a harmonic balancer solves the problem but for others it makes no difference.

Mine has developed a nasty vibration/clatter at 1500rpm. I've noticed it as a rough spot when driving around town, but having spent the weekend poking around tracks up at Terrick Terrick National Park I found I was spending quite a bit of time around 1500rpm and it was really obvious. I sounds suspiciously like the exhaust system (the revs seem too high for the flex joint which rattles at 1200rpm). Googling suggests it might be the flex plate on the Torque converter but I would have thought a cracked flex plate would have been apparent across the rev range.

this was on tech chatter also,
a replaceable center bearing,
cheers people

http://www.aulro.com/afvb/technical-...check-out.html

just got home from work. first decent drive since new engine and gearbox mounts, and i have to say WOW !!
don't think it has ever been as smooth to drive. admittedly i bought it was 160k klms on it though.

Ross

Try pulling the handbrake on slightly when you get to 2000rpm, if the vibration goes away then it's the handbrake adjustment. Adjust it so it clicks 3 times to fully on and you'll be right.

Td5 2001 Auto

My clatter was at 2000/2200 it sometimes reduced by easing the handbrake on.
I replaced the springs in the handbrake doubled them up where possible and silence was achieved. Well you could now hear all the crap rolling around in the back
Regards Ollie

Just finished replacing my left side engine mount. It has made a world of difference to the vibration around 2100rpm. It is pretty obvious that the engine has some sort of harmonic at this rpm, but now it's not traveling through the chassis and into the cabin.

The vibration at 2250........

You need to resistance test the coils on the valve block of your Ace system, especially the pressure control valve on the side. No resistance, no work. Don't rely on Ace ecu data and fault lights, the ecu uses old eprom data if it doesn't get valid data.

If the coil on the pressure control valve is shot, then this valve will be fully closed. This allows pressure in the Ace system to build up to 185 bar all the time, instead of pressure only being applied in conjunction with the direction valves when cornering.

This build up of pressure is the source of the vibration.... Check your Ace block.

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Originally Posted by sabredylan

The vibration at 2250........

You need to resistance test the coils on the valve block of your Ace system, especially the pressure control valve on the side. No resistance, no work. Don't rely on Ace ecu data and fault lights, the ecu uses old eprom data if it doesn't get valid data.

If the coil on the pressure control valve is shot, then this valve will be fully closed. This allows pressure in the Ace system to build up to 185 bar all the time, instead of pressure only being applied in conjunction with the direction valves when cornering.

This build up of pressure is the source of the vibration.... Check your Ace block.

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If only it were that simple a fix!

The vibration is evident in my vehicle and I don't have ACE. It's a general problem across the diesel range - some are worse and some are better but it's there in all of them.