Rear drums backplate

Yeah I'm pretty staggered. When they fitted the handbrake cables they had the car three days, I couldn't get hold of them, went round of the Friday and they'd left! Turns out they are now on a 4 day week, didn't bother to let me know. I had the car booked in with a friend to do the cambelt that weekend... I think the chap that did the cambelt will be getting any jobs from now on though he is expecting a baby soon so limited availability soon I think!
 
Evoman said:
Swapped over with good help of a friend, noise completely gone...

I feel I should give the garage the opportunity to respond however I did return the car to them shortly after collection informing them of the noise. That is when they came back with the response after having the car 2 days that the back plates need replacing as they are twisting due to corrosion. Though initially they thought it was a retaining pin moving and scraping again because of corrosion...
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Refund in order, and an apology ... perhaps, but don't hold your breath.
Mac.
 
Evoman said:
Swapped over with good help of a friend, noise completely gone...

I feel I should give the garage the opportunity to respond however I did return the car to them shortly after collection informing them of the noise. That is when they came back with the response after having the car 2 days that the back plates need replacing as they are twisting due to corrosion. Though initially they thought it was a retaining pin moving and scraping again because of corrosion...
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I don’t think you are finished yet. The rear cables are handed and they used two of one side. You need to see what they have done under the car to make the wrong cable fit.
Edit; there are also the cylinders that are corroding. I have a thread on the subject that Photobucket messed up. I’ll see if I can find the pictures and update it.
 
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The slave cylinders look more caked in brake dust and perhaps some brake fluid. The whole assembly would benefit from a clean and surface rust removed from the back plate. Once clean the slaves can be fully inspected for corrosion.
 
I didn’t think you replaced the cylinders recently? Just the shoes and the brake cables?
Galvanic corrosion occurs when dissimilar metals, in this case steel and aluminium, are in contact. Aluminium oxide forms that has more volume than aluminium so it lifts the cylinder. I my case the corrosion was so advanced and there was a risk of the shoes slipping off the pistons.
The white between the cylinder and back plate is what I think is galvanic corrosion. As already noted a good clean up and inspection is advisable:

IMG_0991.jpeg


Are the pistons orientated correctly? If you look at my assembly a lip on the piston to retain the shoe is clearly visible.

Edit, when you swapped the shoes across the axle did you swap both leading and trailing shoes? Both are wrong in the above picture. The entire shoe and lever assembly looks like it has been fitted to the wrong side.
 
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Little Dog said:
I didn’t think you replaced the cylinders recently? Just the shoes and the brake cables?
Galvanic corrosion occurs when dissimilar metals, in this case steel and aluminium, are in contact. Aluminium oxide forms that has more volume than aluminium so it lifts the cylinder. I my case the corrosion was so advanced and there was a risk of the shoes slipping off the pistons.
The white between the cylinder and back plate is what I think is galvanic corrosion. As already noted a good clean up and inspection is advisable:

View attachment 120825

Are the pistons orientated correctly? If you look at my assembly a lip on the piston to retain the shoe is clearly visible.

Edit, when you swapped the shoes across the axle did you swap both leading and trailing shoes? Both are wrong in the above picture. The entire shoe and lever assembly looks like it has been fitted to the wrong side.
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Yes indeed, swapped the whole assembly across from one side to the other.
Appreciate the tips and info!
I shall pay them a visit Monday and suggest the friend that assisted just needs their address to forward his invoice 🤣
 
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