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Nov 16, 2009 | 10:29 AM

#20 (permalink)

onehundred80

Senior Member

Joined: Apr 2006

Posts: 25,432

Likes: 647

From: Ontario

Re: Loud POP

Quote:

Originally Posted by dedwards0323

My 07

And as Dan stated earlier, it's the parking brake mechanism "sticking" when used. Over the years, some cars I've owned were more prone to this "pop" than others. Rear drum systems were especially bad about this phenomena when they got wet due to their basic "closed" design. (Note: My Merkur XR4Ti's always did this, since they came with factory rear drums.) That's a primary reason why rear drum systems had rubber plugs for the slot where you adjusted the brake shoes - had to keep the moisture out. With disc brake systems being an "open design", they are exposed to moisture all the time and can occasionally experience this pad "sticking" issue when the emergency brake is used. But the design geometry of disc systems enables moisture to drain off much better, with the resultant that rear disc systems typically do not experience this issue. But it seems like the Crossfire is somewhat susceptible to this phenomena.

Later,

This is a bit misleading, upon reading this post you could interpret from it that the emergency/parking brake was the disk brake mechanism, when in fact they are two separate systems.
The so called "popping" does come from the emergency brake, this could be from the pads adhering to the drum face, the cam action mechanism releasing, tight cables due to rusting or lack of lubrication inside the cables. I would suspect that the lever operated cam action is the main cause of the noise.
If the handbrake lever has excessive travel in use, the parking brake should be adjusted. This excessive travel is caused by the cable length being too long and/or too much clearance between the drum and parking brake lining. If the cam is traveling too far it may jam easier. A suitable lubricant, not to much, should quiet the noise and stop rust forming on the contact surfaces of the cam mechanism allowing the cam to operate freely. Infrequent use of the hand brake allows rust to develop and make the cam action stiff.

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