ZR-1 Brake Bleeding

Last Update: 11/11/2006

by Jerry Schubert

 

Hard part:

 

Purchase a small sprayer bottle, either a $50 Motive Power bleeder (fittings don’t work on a C4 but it does come with a pressure gauge) or a $12 sprayer at Home Depot if you like to assemble stuff from scratch. Purchase a C4 master cylinder cap and some brass fittings along with some good epoxy.

 

Bottom line: You’re going to have around $80 for a power bleeder that will work as it should on your C4.

 

Order of caliper bleeding: passenger side rear, drivers side rear, passenger side front, drivers side front.

 

Most drug stores give out for free small syringes (no needle). Ask for a 30 ml syringe. They’re free so ask for a dozen or so. Turkey basters are for turkeys, don’t use them as they are messy and are Bush league.

 

Remove the master cylinder cap. With the free 30 ml syringe, remove the old, black brake fluid down to the bottom of the master cylinder. If there’s black reside, get some tissues wrapped around a screwdriver and remove all black material. Remove it all.

 

Fill the master cylinder with fresh brake fluid. Keep all container lids closed as much as possible as brake fluid attracts water from the air and lowers the boiling point of your new fluid.

 

Attach you power bleeder to the master cylinder. Close all the pressure relief valves. Pump the bleeder to a maximum of 15 lbs pressure.

 

With a 10mm wrench, a clear hose attached over the bleeder valve run to a catch container, ( I use an old bourbon bottle with a cork drilled out just bigger than the clear hose), crack the bleeder valve and watch for new, clear fluid to start to show and no bubbles. Should be about 10 -15 seconds, max. Tighten the bleeder valve and remove the hose.

 

Repeat on 3 remaining calipers.

 

WARNING, WARNING – Keep a close eye on the master cylinder fluid level. If it gets half way down, remove the power bleeder, fill up the master cylinder, pump up the power bleeder again and resume bleeding.

 

  Disclaimer:  Repairs and techniques are reported here by amateurs and professionals as an informational opinion service only and should not be attempted by other than factory trained and certified technicians. The ZR1 Net does not recommend anyone doing these procedures and is not responsible for any adverse outcome. Factory repair manuals should always be used and followed to the letter in conjunction with any repair or maintenance performed. All cautions and warnings that appear in the factory manuals apply here as well. As recommended in all service manuals, proper eye and body protection as well as proper tools must be used for any maintenance performed by individuals. Working on automobiles is dangerous and could result in personal and/or property injury. If you do not have the proper tools or know-how, you should not do any of these procedures, but have a qualified technician perform the work.  
   

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