Name This Noise

[Sven_040]

Your mission, if you choose to except it...... is to help with ( you guessed it ) a noise.

The symptoms are as follows:

1. A squeking noise that sounds like a cricket on far too much speed, interesting enough, i think its brother is a little slower ( yes, a double squeak noise)

2. This noise/s can only be heard under the following conditions

a) in gear and driving (never in P or N... fantastic for the mechanic)

b) only seems to come 'on' at 1600rpm and above, but not when i try to mash the go pedal through the firewall.

c) noise goes quiet when i back off the accelerator, regardless of rpm

3. My speedy cricket/s have gone from soft and intermitant over the last 500kms and are now louder and on full song all the time except for the above.

Recent parts replaced etc in the last 7 weeks (maybe a by product of these)
1. Viscous fan and boost acuator (darwin)
2. Harmonic balancer (darwin)
3. accelerator pedal (alice springs)
4. 600km tow back to alice springs (P.S Neil @suttons in Alice is a great mechanic)
5. Air flow meter (alice springs)

Thats all for now

I hope i don't sound too crazy but when you're travelling around australia ( which i am) and you're spending ALL (and i mean ALL) your money on a car it can become very nerve racking.

Thanks Thanks again

[alien]

Guessing TD5..

Mine had a noise like you discribe.
It was the viscous fan mount bearing, the one in the timing case.
Mine was turning the outer shell in the housing.
Give away was movment at the fan blades, grabed both sides and wobbled

[Sven_040]

Yes, Sorry, the car is a TD5 Auto.

I replaced the viscous fan assenbly in darwin, Are uou saying it might be inside the motor at the front???

Thanks

[trev]

Could be the front Cardan universal joint on the way out.

If it lets go, and the crickets do sound ominous,it will most likely destroy your auto case when it breaks and thrashes around.


Trev.

[Scouse]

Could be the front Cardan universal joint on the way out.

If it lets go, and the crickets do sound ominous,it will most likely destroy your auto case when it breaks and thrashes around.


Trev.x2

Or just the usual exhaust manifold leak. Check the rear most nut/stud & see if it's still there.

[alien]

Yes, Sorry, the car is a TD5 Auto.

I replaced the viscous fan assenbly in darwin, Are uou saying it might be inside the motor at the front???

Thanks
There is a bearing held in the timing case by a circlip.
The viscous fan mounts to the shaft that goes through it.
This thread may help;)...http://www.aulro.com/afvb/technical-chatter/92050-td5-fan-hub-idler-bearing.html?highlight=viscous

Make sure you check your front shaft as mentioned 1st.
Costly if it is that and it "lets go".

[John W]

With your window down, find a modestly steep hill and if it is the front shaft universals then you should hear it even below 1600 as soon as the load comes on just starting up the hill from stopped. It will clearly increase in frequency with shaft rotations increasing with increasing road speed. Does sound like crickets. Easier still get under the car and have a look.

My experience with exhaust manifold leaking is that it sounds a bit like a slipping fan belt and you will find the loose or missing nut/s as previously stated.

Good luck finding it.

[Sully]

Try this for a test....

Turn off your climate control and check if the noise has stopped. If so, your clutch bearing on your AC compressor is likely shot.

Symptoms sound exactly like mine.

[Discobaker]

Have a read of "Disco 2, front prop shaft grease points" there's some pics & explanations in this thread that may explain what you're experiencing & failing that, it's always a good idea to be sure your joints are well lubed, my rubber boot protecting the furthest forward uni was split therefore, even when I filled it as much as possible with grease it'd just fling out with the rotation of the front shaft. Fingers crossed my new boot is in my post box (cheers Phil at discovery spares) today!!!
A job for the weekend :)

[Discobaker]

http://184.72.239.143/mu/012b7124-e782-fda4.jpg
This I believe is the cause of my Jiminy Cricket noise :)
Mine split down the centre through the widest point of the boot's circumference.
Will post a pic when I get the old one off.
Would I be correct in assuming I've gotta drop the front of the prop shaft out to replace?

[trev]

The cricket noise is usually the front double uni joint (Cardan) its the sound of dry needle rollers disintergrating.
Pushing and pulling at the joint in place may not reveal much.
Probably better to drop it and check for any binding or looseness.

Trev.

[Discobaker]

The cricket noise is usually the front double uni joint (Cardan) its the sound of dry needle rollers disintergrating.
Pushing and pulling at the joint in place may not reveal much.
Probably better to drop it and check for any binding or looseness.

Trev.

Ok, will do but is it normal for the DC do fail even when it's full of grease? I remember taking note of how many pumps of the gun it took before the joint purged & it was only about 1.5 & the old grease that came out was pretty clean?
Cheers mate
Mat

[trev]

I agree replacing the boot is needed,but,are your rear universals on that shaft greasables?
Anything will fail eventually,but the original sealed DCs were an issue.
If you have greasables there they will be preferable but if you have a lift the angle is increased and they need to be checked regularly just to be certain.
I can`t see the front spline making those sort of noises even if worn.

Trev.

[Discobaker]

http://184.72.239.143/mu/31c18b62-6b1d-c65e.jpghttp://184.72.239.143/mu/31c18b62-6b2e-7baf.jpghttp://184.72.239.143/mu/31c18b62-6b72-9f29.jpghttp://184.72.239.143/mu/31c18b62-6ba2-25c4.jpg
All in, good as gold now, front joint took 10 pumps of the gun & just for good measure I put another 3 in each nipple on the DC.
Jiminy cricket noise gone so I guess it hard to tell if it was the front or the rear causing the noise. Thanks again to all who chipped in.
Cheers
Mat