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Chevrolet Cruze Estate VCDiT 1.7 2013
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Discussion Starter #1 (Edited)
Has anyone else experienced this on their Cruze? My brakes are "grabbing" when medium pressure is applied to the brake pedal. My recent MOT picked this up and isolated it to the front brakes (advisory item, not a fail). Under normal circumstances I would be thinking warped discs, so I have done a basic runout check (but not with a DTI - all mine seem to have gone walkabout!!). There was no visually noticeable runout, but maybe someone on here has a handle on how little deformation could be required to produce this effect?
My other though was worn engine mountings, but again there is no visible wear, and the vehicle has only done 40k miles.
Any ideas or feedback extremely welcome.
 

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SA, Well done for completing your Sign-up but it would have helped to know which year your vehicle is? (You can go back and add this info)
What I would be inclined to do initially is to remove the front calipers and (i) check that there has been no delamination of the pad from the carrier; (ii) thoroughly soft wire brush the 'guide rails' clean and lubricate the sliders ensuring you do not get lubricant onto the face of the disc. (iii) thoroughly clean (degrease) the disc faces.

I'd do these first.

There may be a possibility of a 'lazy or seized' caliper piston giving unequal grab causing oscillation.

You sound to be reasonably 'technical' but if you are unsure of any aspect as far as brakes are concerned, take it to a brake & clutch specialist for safety reasons.

Useful link worth reading here :- EBC Automotive Brake Tech – brake calipers

New Forum Member helpful info here ;- Helpful Guidance Using the Forum
 

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Chevrolet Cruze Estate VCDiT 1.7 2013
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Discussion Starter #3
Sound advice - thanks Ed. I'll be taking a look at the weekend.
 

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Sound advice - thanks Ed. I'll be taking a look at the weekend.

SA, Did you have an opportunity to check the callipers etc and did you solve the problem? If so it might be useful for others to know what the solution was.
.
 

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Chevrolet Cruze Estate VCDiT 1.7 2013
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Discussion Starter #5
Yes AE, I've checked the calipers and found partial seizure due to dirt (more like solid concrete!) in the retaining grooves both sides. There is also significant wear on the discs. I've removed, cleaned, greased and reinstalled calipers and pads (which are virtually new) and found a massive improvement in performance, but there is still minor residual oscillation only noticeable now during heavy braking.
I have to assume that there has been some distortion of the discs under the previously unbalanced braking loads, so have purchased new replacements and am just waiting for a warmer day off on which to replace those too (I have an arthritic hip and crouching over wheel hubs in near zero temperatures causes me days of grief!!!).
The caliper removal and replacement was straightforward. I did have to lever off the inner pads though - both sides, so I used plastic shim to protect the pad and disc surfaces and steered to full lock for better access.
 

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SA, your reply is reassuring and sounds as if you've tackled the problem successfully. New discs and it should all be 'as new'. (I understand about the hip in cold weather. I've got bit similar in right knee) .
 
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