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[Marks DTM Calib]

Dimples only there to force an interference fit, whilst allowing large moulding tolerances

Reassemble without the sleeve, suitably spaced with summat to give location, fill with resin mix, allow to set and trim excess as required

Unless the sleeve allows rotation of the arm/bush...

It does, hence the recommendation of oil impregnated nylon 7

[05omegav6]

Surely 10 minutes on a lathe would be easier than moulding, and you could be sure that it's not off-centre then, too?

If you have a lathe... could space it evenly with matchsticks or similar

Dimples only there to force an interference fit, whilst allowing large moulding tolerances

Reassemble without the sleeve, suitably spaced with summat to give location, fill with resin mix, allow to set and trim excess as required

Unless the sleeve allows rotation of the arm/bush...

It does, hence the recommendation of oil impregnated nylon 7

Got it

[chrisgixer]

But I really don't see a big inanimate lump like a stearing box behaving like a spindly arm with a pivot under the same vibration. But I guess we'll see.

Exactly, what I am saying is that the big inanimate lump that is the steering box is currently transmitting every vibration going from the drivers side through the chassis and setup and hence using an alternative material on the idler will make bog all difference. 

....If there's no play. With play in a bearing in the idler, or something solid used instead of the rubber....

....it'll give an audible warning.


The dimples shown allow some play to gradually creep in. The steering box, when loose, creaks. As we know, thanks to the pikey pensioner. The creak is totally insulted from the driver thanks to the riveted damper at the join of the column to box. Forget the name of it.

Anyway, I don't agree with you. but let's see what transpires.

I need to get the old idler off and fit the new one first. Not this week anyway.

[05omegav6]

At least it won't need a set up after...

[chrisgixer]

Fitted another new lemforder idler today, to a members car.

Had to tighten it to 110nm to get most of the play out of it. Correct torque being 60nm I believe.

There is still vertical play even now.

Cast arm is very different to the gm part. The number on the rubber bush is different between the two as well. Although I suppose they would be.

[Jimbob]

Hmmm, has the Lemforder part changed?  Or was it an ebay special, and a clone?

[chrisgixer]

Does anyone see a problem with making this in two halfs? Ie top and bottom top hats.

So it would be a case of inserting the top and bottom half, then inserting the inner sleeve, and then bolting it up as normal. Bit like the poly wishbone bush, but on a vertical plane obviously.

[chrisgixer]

Anyone?

[05omegav6]

How thick would the material be? Installation might be an issue if too thin

[Marks DTM Calib]

Has anybody got an old idler arm and chassis mount?

[chrisgixer]

Has anybody got an old idler arm and chassis mount?

Yes 2. ...but oe one has very knackered rubber, partly missing, and pattern one might have odd dimensions.

Unfortunately these guys are very busy.

I rekon two halfs would work...? No?

[05omegav6]

Inserting a poly sleeve without kinking/creasing it might be impossible as it will have limited structural strength until it's assembled

That stuff I used for the diff mounts might work if the components can be positioned correctly and the resin can be poured/injected into the assembly...

[chrisgixer]

Inserting a poly sleeve without kinking/creasing it might be impossible as it will have limited structural strength until it's assembled

That stuff I used for the diff mounts might work if the components can be positioned correctly and the resin can be poured/injected into the assembly...

Material will be Nylon, initially. Then if acceptable That oil impregnated Nylon 7 Mark mentioned. 

It's quite hard, but does need to be a tight enough fit to avoid play, obviously.

[05omegav6]

How thick are the walls of the sleeve?

[chrisgixer]

How thick are the walls of the sleeve?

1.5mm, going by the worn oe item here.