1990 Mercury Wagon brakes

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  #1  
Old 10-01-02, 10:55 AM
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1990 Mercury Wagon brakes

1990 Mercury Grand Marquis Colony Park 5.0L EFI. Brakes sound rough intermittently. No apparent affect on performance. Does not happen all the time, but usually every other day or so at least. Have examined the pads and rotors, shoes and drums. No evidence of metal on metal. Any thoughts? I replaced one of the front calipers about 2 years ago, and both shoes at that time.
 

Last edited by sleepy hollow; 10-01-02 at 11:51 AM.
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  #2  
Old 10-01-02, 12:28 PM
Joe_F
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What quality replacement parts were used?
 
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Old 10-01-02, 12:51 PM
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I believe they were Wagner parts. I typically only use brand name parts, but cannot be exactly sure since it was a while ago.

Could such noise be caused by the caliper I did not replace?
 
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Old 10-01-02, 01:09 PM
Joe_F
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Not likely. What type of noise is it? Grinding like worn pads?

You should have replaced both calipers and flex hoses. Dirt cheap on a car like this and good insurance against problems later on.
 
  #5  
Old 10-01-02, 01:40 PM
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You are quite right. However, back then I had only time to replace the one that was acting up. Naturally, I never got around to the other one. No excuse, but there's usually something of higher priority on the weekend to-do list. Forunately I can now get back to this one.

Yes, the sound is a grinding noise, but not as bad as worn shoes. I just replaced a rotor on my son's car that he had worn the shoes off of. The noise on the wagon is not nearly as bad, it just sounds like something is not quite right.

I also should add that, contrary to my initial post, I get some "wandering" when I apply the brakes sometimes. Not too bad, just pulls a tad to one direction or the other. Not always the same way, and usually there is none. I just wondered if anyone out there had any similar experiences. I saw a service bulletin title on harsh braking, but could not get to the bulletin itself, to see if it was relevant.

I can always tear things down, inspect and start replacing parts in a logical fashion.
As you say, they are very cheap on this car. Especially since she's been paid off for 10 years now, has 140K miles on her and still looks great. Spending even a couple of hudred or so on replacement parts is a very good investment. [Though this problem probably is in the under $100 category.]

In only a few more years she'll be a real classic seeing as how they do not make "real" station wagons anymore, and ones I see on the road are usually pretty beat up.

Any suggestions for a diagnostic approach would be most appreciated.
 
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