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post #1 of (permalink) Old 08-01-2003, 10:33 AM Thread Starter
 
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Dust shields: necessary?

Pretty simple question.

Finally getting around to putting front discs on my 76, and the donor's dust shields are more rust flake than metal. Do you believe there's any point to replacing them in one way or another, or should I just go ahead and do the install without them? Do they serve any real purpose on a mostly trail rig, or are they necessary for PA inspections (I know there are alot of PA folks here)?

Thanks.
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post #2 of (permalink) Old 08-01-2003, 10:41 AM
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Re: Dust shields: necessary?

Don't know about PA, but I cut the shields off on my Waggy axle. I didn't want to trap mud or dirt, and the shields were rusty like yours. Just cut them off and put a fresh coat of Krylon black on the caliper brackets.

later,
Tom
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post #3 of (permalink) Old 08-01-2003, 11:10 AM
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Re: Dust shields: necessary?

I'm with Tom. I think they do more to trap junk against the rotor, than protecting it. [img]images/graemlins/crazy.gif[/img]

FWIW, I never had them when I converted to discs last year and haven't missed them either...
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post #4 of (permalink) Old 08-01-2003, 12:24 PM
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Re: Dust shields: necessary?

I can't answer your question other than to say that I have discs on all four corners with no dust shields and have had no problems.

I've never understood the purpose for the shields. Are they to keep dirt from depositing on the discs and getting trapped under the brake pads, or are they to keep metallic brake pad particles from finding their way into the engine compartment, depositing on spark plugs, the coil and distributor and shorting out the ignition? The best thing would be to ask the engineer that put them there in the first place but being an engineer, sometimes I don't even remember why I did something I did once the ink has dried.
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post #5 of (permalink) Old 08-01-2003, 12:54 PM
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Re: Dust shields: necessary?

A lot of dust sheilds have a little scoop on the back that cools the rotor at highway speeds. With a trail rig, this would not be an issue so I don't see any problem with leaving the sheild off.
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post #6 of (permalink) Old 08-01-2003, 01:36 PM
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Re: Dust shields: necessary?

I pulled my rust bits of dust shilds off when I put U-joints in the front axle. They do keep brake dust 'near' the brakes and off other stuff AND they direct air (at road speeds) past the rotors to keep them cool. I haven't noticed any negatives to warrent replacing them though. If I did, I'd get the Stainless ones that 4WD Hardware sells. They are kinda spendy, but they won't rust out again.
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post #7 of (permalink) Old 08-02-2003, 05:18 PM
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Re: Dust shields: necessary?

I have scrapped them on everything I have, never had a problem.
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