Thread: Td5 Roational 'rattly' noise

all Viscus couplings undo in the same direction as rotation.

Check the harmonic balancer, power steering pump, and the tensioner is on the left side of the engine (as you're looking at it from the front) and is under the alternator.

sounds balancer like to me, any chance of a sound byte?

jc

A sound bite is a bit more than I can manage at the moment.

Run out of daylight now, and the shed is full of D1 and RRC. That will change tomorrow.

As for harmonic balancer, the bit I can see (in front of drive belt pulley) does have a bit of run out but not excessively so.

I'll remove the viscous fan tomorrow and go from there, I've not worked on Kayes D2a before, always been Dealer serviced since new so I know little about it mechanically. Is balancer failure a common problem, guess I'll do a search.


Deano

deano, if the rattle is also evident as a couple of extra 'clacks' after the engine is switched off, just as it stops rotating, it is quite likely a balancer. when you remove the belt you will no doubt be able to pin point it.

jc

Don't know about extra 'clacks' on stopping but I reckon you're on the money with the harmonic balancer. Noise seems to dissipate when engine is revved up a bit.

Have spent the last 4 hours trying to remove the @#$%&** viscous coupling, even made a special tool to bolt onto two of the hub bolts, which eventually broke (not the bolts my special tool) .

Is the Disco safe to drive ? I thought of taking it down to my friendly radiator man (15 Km's away) who has one of those 'claw' type tools which hook over the fan pulley bolt heads and get the hub un stuck.

Deano

It's difficult to say Dean, It may well be fine.

Mine was rattling when we were in tassie, and it made it all the way back to Qld with no issues.. another 3k km or so.

I would probably risk it unless it really sounds terrible.

The fan is a normal thread. just hitting a spanner without the lock tool will normally remove them

My special tool is an old sidcrome flat spanner - a large one but quite thin - with the jaws modified to fit the nut on the fan with an angle grinder - and then hit with a large hammer.

The shock tends to undo it - or at least it always has for me

Access is much improved if the egr is removed and filed on a shed wall.

alanw

Success !!!

Actually thanks to my friendly radiator repairman, Mark, (plug for Pakenham Radiators) we managed to hold the viscous pulley bolt heads with an 18" tool and with another 18" bar on the viscous hub spanner managed to crack it. No amount of belting the hub spanner with a hammer to get this little beast undone.

All pulleys rotate OK with no obvious 'graunching' or binding, though the viscous hub spindle has about 1mm of end float, is this a worry ?

But the real culprit, I reckon, is this.......... bolt on front half of the harmonic balancer



So there we go, how's that song go...........'Two out of three aint bad' , more like two down one to go .

So top marks and thanks to you justinc, the perfect diagnosis.

Looked up prices, just as well I was sitting down , bloody hell, new ones must be made of platinum or something.

Question to those in the know. Is it OK/safe to drive without the balancer for a period ? (certainly safer than driving with only one lug remaining).

Next drama is getting the old one off and working out how to get 450 Nm for the new one.

If I were to get a solid bar and weld a 3/4" male fitting on one end and a 1/2" female fitting on the other end at exactly 1 metre centres will I have an 2:1 torque wrench extension for my 1/2" tension wrench ? ie. will 225 Nm on the torque wrench equal 450 Nm at the socket ?


Deano