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Altima Nissan Altima Sedan Discussion Forum

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  #1  
Old 07-16-2012, 12:24 PM
umee1989 umee1989 is offline
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Default Urgent help!

my caliper piston came out and i tried pushing it back in and it won't go in. I went in my car hit the brake a few times and piston came out further and my dumbass decided to pull it out by hand and i accidently pulled it out fully some brake fluid leaked out and now idk what to do it never popped out it just came out because i pulled it and the rubber seal isn't ripped or anything i just need urgent help.

i have a 2007 nissan altima 3.5sl
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  #2  
Old 07-16-2012, 01:14 PM
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NissanTech NissanTech is offline
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There is no trick or anything you just have to add a bunch of grease around the piston and press it in by hand.
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  #3  
Old 07-16-2012, 05:55 PM
umee1989 umee1989 is offline
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thats the thing its not going back I'm using a kit i got from auto zone to force it back and it still won't go back and theirs a lot of brake fluid in the hole where the piston was and a lot drained out idk what to do I'm really new to this stuff

all i was doing was changing my lug studs and this happened
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Old 07-16-2012, 07:33 PM
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Wait, is the brake line still connected to the caliper? you have to disconnect the caliper and try insert the piston with the caliper disconnected.
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Old 07-16-2012, 07:55 PM
umee1989 umee1989 is offline
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yes everything is connected. this is exactly how i have it: both brake pads off, piston is out, the thing the piston goes in is still connected to the pipe thing and brake fluid leaked out of the caliber.
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Old 07-16-2012, 08:26 PM
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You have to disconnect the brake line, because if you don't disconnect the brake line, the air and fluid inside the caliper has no way to go.

Remember to bleed the system once you install everything back together.

Instruction from service manual:

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Old 07-16-2012, 08:31 PM
umee1989 umee1989 is offline
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im gonna try this tomm.

so remove all the brake fluid in body. disconnect brake line. grease the boot and piston. pour brake fluid into body. pull boot over piston. and leave brake line disconnected while pushing the piston back in?
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Old 07-17-2012, 07:41 AM
sawdusted sawdusted is offline
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Quote:
Originally Posted by umee1989 View Post
im gonna try this tomm.

so remove all the brake fluid in body. disconnect brake line. grease the boot and piston. pour brake fluid into body. pull boot over piston. and leave brake line disconnected while pushing the piston back in?

You don't have to disconnect the brake lines. Just open the bleeder valves.

Personally, I don't use grease to lubricate the boot. I use brake fluid. You don't need to pour brake fluid into the body. Just wet it with brake fluid enough to lube up the piston so that it slides in easily.

It takes some practice but you will slide the boot partway onto the piston, push in the other end of the rubber boot into the body, then push in the rest of the piston. Make sure the boot seats in well before you push in the piston.

And of course as others have mentioned, bleed the brakes when you're done.
HTH
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