Creak When Braking

I am hearing a creak from the front.

It does occur when:
Braking from any kind of speed
When going over anything on the road that causes the suspension to expand/compress

It does not occur when:
Manually pushing down on front of car to compress the suspension
Braking very very gently from a slow speed
Pushing hard on the brakes when not in motion

Looking at the exploded view in the parts manual I am wondering if breaking and suspension while in motion could be putting pressure on, and revealing a problem with, the anti-roll bar end bushes (108912), the mid-point anti-roll bar rubbers (100774), and/or the lower arm bushes (100154)?

Appreciate a "noise" is hard to diagnose but wondering what others thoughts are on potential culprits could be so I can order and replace the lot.

Often you can find a squeak by hitting a few parts at a time with a water hose then try to reproduce it. Of coarse you don't want to use silicone spray on the pads or rotors, but it works even better on rubber.

Quote:

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Originally Posted by Ron

Often you can find a squeak by hitting a few parts at a time with a water hose then try to reproduce it. Of coarse you don't want to use silicone spray on the pads or rotors, but it works even better on rubber.

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Great idea thanks Ron. Water though? What about a displacement/lubricant such as WD40?

I found that the nut that holds the front axle shaft was finger tight instead of 150+ lb., made brakes squeal at any speed.

Quote:

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Originally Posted by Tillsy

Great idea thanks Ron. Water though? What about a displacement/lubricant such as WD40?

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It's safe since everything gets wet all of the time anyway (cheap, and it's usually handy ;-) I've used WD in the past but use PB/Seafoam these days (for bound parts). They make a stinky mess which is why I said silicon..it penetrates pretty well, not as harsh on surroundings, and seems easier to clean up to me. Did I say they others literally stink? It just depends on what/where I'm testing and the mess it will make...

Another reason for water is I can wet the whole area and see if it will help, then narrow down (by half) until I just pick and choose....

Quote:

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Originally Posted by Ron

It's safe since everything gets wet all of the time anyway

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That's a good point - cheers!

I filled a spray bottle with water and squirted the left side anti-roll bar bush as that is where I thought the sound was coming from. Drove a few metres and hit the brakes, reversed, and retried several times - no change.

I then sprayed the right side anti-roll bar bush, drove a few metres, and braked - the sound seemed a little different this time. Reversed and tried again - SILENT!!! Repeated quite a few times and it was still dead silent!

Have now applied WD40 and taken her out for shakedown cruise #6 - she was an absolute beauty!

Thanks for the tip Ron! Next question is whether it was simply dried out and is now happy, or the bush still needs replacing. I am figuring I should replace them both anyway...

BTW SS Spoiler thanks for your help too, really appreciate your first post being to help someone :) I quickly checked both front axle nuts last night when I read your post but they were on nice and tight!

Just a quick wrap-up.

Like most of the 30 year old rubber bushings they were looking a little worse for wear so decided they should be replaced. Took the opportunity to import and install Toby's polyurethane upgrade kit last week.

WOW what a difference - love it :)