Diagnose my knock

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someguy
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Diagnose my knock

Post by someguy » Fri Dec 17, 2010 3:19 pm

Hi All.

Been chasing a strange knock on the L and close to a grand later still have not got it.

The symptoms: Decelerating/Driving/Rolling at speeds bellow 35km/h makes a snap-clunk-snap-clunk-snap-clunk noise from the front end of the car which is aggravated by quick corners/tight steering.

Things I have replaced within the last 2 weeks:
* Both front driveshafts (full assembled shaft) (so no bad CV's)
* Engine & Gearbox Mounts
* All front end bushes

I am also getting a single knock when I put my foot on the brake to slow down (almost as if the pads are moving a bit) but not sure if thats related. (could this knock be related to an issue with the calipers maybe?)

Any ideas as its driving me insane?

Thanks
* 1990 L Series Sportswagon (Daily Driver)

* WTB 1982-84 MY 4WD Wagon (Any Condition)

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TOONGA
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Post by TOONGA » Fri Dec 17, 2010 4:52 pm

sounds like one of your disc pads is doing a merry jig in the caliper

TOONGA
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JETCAR AKA the sandwedge Rusted in pieces

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wrxer
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Location: west aus

Post by wrxer » Fri Dec 17, 2010 6:12 pm

get somone else to drive car slowly past you or around you in a circle as you listen for noise. try to pinpoint its source to which side and weather its at brakes or inboard. try pulling handbrake on a couple of clicks or riding brakes, this will show up rattly pads or calipers.
if brakes dont affect one or all noises, jack wheel up and shake rattle and roll it to see if you can make it make its noises so you can pinpoint source.
"UNDERSTEER" is when you hit the fence with the front of the car.
"OVERSTEER" is when you hit the fence with the rear of the car.
"HORSEPOWER" is how fast you hit the fence.
"TORQUE" is how far you take the fence with you.
[SIGPIC][/SIGPIC]
If it works, pull it apart to see why.

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steptoe
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Post by steptoe » Sat Dec 18, 2010 11:29 pm

it is that empty beer bottle under the front passenger seat transfering against all logic towards the front engine bay :) Surely a 28 dollar fouteen pont inspection would find at least something near the source?

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someguy
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Post by someguy » Wed Dec 22, 2010 10:06 am

Ended up finding out what is was.

Was the pads.

thanks to wrxer I drove slowly and engaged the handbrake and the noises stopped straight away but when I disengaged the handbrake the noise came straight back instantly.

So might pull the calipers off this weekend and have a fiddle
* 1990 L Series Sportswagon (Daily Driver)

* WTB 1982-84 MY 4WD Wagon (Any Condition)

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poprock1
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Location: hunter valley

noise

Post by poprock1 » Wed Dec 22, 2010 2:28 pm

Thanks, been lurking waiting for the answer.:-D

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