WD-40 bad?
#1
Junior? Not since 1987...
Thread Starter
WD-40 bad?
So today i installed new rear brake pads and rotors on the '15 150. It has the electric parking brake system. Before anybody asks...yes...i did the procedure and set the epb in service mode. My issue im having is the rubber dust boot that surrounds the caliper piston. When i compressed the piston the rubber boot didnt compress like it should have. I used a flat blade screwdriver ever so carefully to pop it back into position. Having no luck with that i thought maybe a bit of lube would help it retract. Before anybody asks...yes...i sprayed WD-40 on my fingers and rubbed it on the boot. That helped a lot to get it to relax back...but...during the course of this it tore. Or maybe the WD has compromised the rubber. Now there is about a 1/8 inch tear in the boot. I've read a few forums and the general consensus is NOT to spray WD-40 on the boot. I need to replace the boot. Just looking for thoughts from other members on replacing the whole caliper or just replacing the rubber boot. Or if anybody else has had this issue.
#2
Senior Member
WD40 Silicone or other silicone spray on rubber parts.
I personally, due to past experience with caliper parts, would go the quick route and purchase a new caliper.
But if you're looking to save money and don't mind tearing it down again, spent $20 or so on the rubbers.
I personally, due to past experience with caliper parts, would go the quick route and purchase a new caliper.
But if you're looking to save money and don't mind tearing it down again, spent $20 or so on the rubbers.
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77Ranger460 (08-11-2020)
#3
Yeah, you should always replace the boots. And WD-40 isn't just silicone... it's a solvent, and it can attack certain rubbers.
I wouldn't replace the caliper if that's the only problem, but if you have any concern about it functioning properly, then swap it. You did grease the slide pins, etc., correct?
I wouldn't replace the caliper if that's the only problem, but if you have any concern about it functioning properly, then swap it. You did grease the slide pins, etc., correct?
#4
Junior? Not since 1987...
Thread Starter
Yeah, you should always replace the boots. And WD-40 isn't just silicone... it's a solvent, and it can attack certain rubbers.
I wouldn't replace the caliper if that's the only problem, but if you have any concern about it functioning properly, then swap it. You did grease the slide pins, etc., correct?
I wouldn't replace the caliper if that's the only problem, but if you have any concern about it functioning properly, then swap it. You did grease the slide pins, etc., correct?
#5
2015 Red SCab 5.0
Even the military bans WD40
We were not allowed to uses it or have it in our shop. Very light use item. US Naval Aviation.
#6
Junior? Not since 1987...
Thread Starter
WD40 Silicone or other silicone spray on rubber parts.
I personally, due to past experience with caliper parts, would go the quick route and purchase a new caliper.
But if you're looking to save money and don't mind tearing it down again, spent $20 or so on the rubbers.
I personally, due to past experience with caliper parts, would go the quick route and purchase a new caliper.
But if you're looking to save money and don't mind tearing it down again, spent $20 or so on the rubbers.
#7
Senior Member
There's a high temp caliper grease specifically for that. I think Valvoline makes a good synthetic one in a little tube or the CRC stuff in the ketchup packets.
Caliper repair kits with seals are $5 at rock auto, can probably get them at the parts store. Dealer doesn't carry repair parts....they carry replacement parts.
Caliper repair kits with seals are $5 at rock auto, can probably get them at the parts store. Dealer doesn't carry repair parts....they carry replacement parts.
Last edited by SSellers; 08-09-2020 at 11:02 AM.
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#8
FWIW, the Power Stop Z36 rotor/pad kits include the boots, caliper lube, etc.
#10