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Frontier Nissan Frontier/HB/Truck Discussion Forum

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Old 10-22-2014, 07:02 PM
Chuck E. Chuck E. is offline
2009 Altima
2007 Frontier Crew Cab
Join Date: Nov 2010
Posts: 33
Default Bench bleed master cylinder

My 2007 Frontier has 120,000 miles. The Brake pedal has been getting spongy and longer pedal travel over past 3 months.
There is no leaks and the master cylinder fluid level has remained stable. Front pads and roters replaced 15,000 miles prior.
Replaced rear brakes and roters after 20,000 because the rotors corroded and and destroyed the brake pads thinking this would repair problem. No change in brake pedal.
I did the bleed procedure per the service manual. There was no air in the system. All flexible hoses seem solid.

Purchased master cylinder and calls for bench bleeding before installation. I referred to service manual for the procedure but it did not cover bench bleeding of the master cylinder.
Pointers on the installation of the master cylinder will be appreciated.
Any other suggestions are also welcome.

Thanks, Chuck E.
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Old 10-23-2014, 02:17 PM
Posts: n/a

you can bleed the system normally, as long as you are bleeding the brakes the proper way
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Old 10-23-2014, 05:02 PM
Chuck E. Chuck E. is offline
2009 Altima
2007 Frontier Crew Cab
Join Date: Nov 2010
Posts: 33

Thanks, I just figured out the four tubes and nipples that were included with the master cylinder are used for bench bleeding. I will followup the master cylinder installation with the wheel bleeding procedure in the service manual and do each wheel in the proper sequence.

Hopefully this will solve the excessive pedal travel and sponginess. I will post my results on completion. I should get to the job this weekend.
Thanks agian, Chuck E.
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Old 10-28-2014, 05:48 AM
Cusser's Avatar
Cusser Cusser is offline
Tech Enthusiast
2004 Frontier King Cab
1998 Pathfinder
1998 Frontier
Join Date: Jul 2007
Posts: 246

Fit those lines into a little jar containing some clean brake fluid. When you push in on the brake cylinder piston, air will come out the tubes and clean brake fluid gets sucked back into the cylinder. Keep doing this, gets most of the air out of the new MC.

Then bleed all four once installed. Remember to screw in fittings by hand a few turns to eliminate chance of crossthreading, and final tightening with a metric flare/line wrench.
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Old 10-28-2014, 04:08 PM
smj999smj's Avatar
smj999smj smj999smj is offline
Master Enthusiast
2006 Pathfinder
2003 Frontier King Cab
2003 Frontier KC SVE 4x4
Join Date: Jun 2012
Location: Prospect, VA
Posts: 1,849

Sequence: right rear, left front, left rear, right front. I usually repeat this cycle at least twice.
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bench, bench bleed, bleed, cylinder, master, master cylinder

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