Best Audi A4 B5 Replacing The Clutch Master/Slave Cylinders
Title : Best Audi A4 B5 Replacing The Clutch Master/Slave Cylinders
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Best Audi A4 B5 Replacing The Clutch Master/Slave Cylinders
Replacing a defective Clutch Master in addition to Slave Cylinders inwards a 1998 A4 Quattro (2.8 AHA)
This article volition enjoin yous how I replaced the clutch master copy in addition to slave cylinders on my car. Neither I nor AudiWorld assume whatever responsibleness for accuracy or applicability to your situation. Read these instructions carefully in addition to accept a unopen expect at an Audi repair manual earlier attempting this chore on your ain car. Be certain to larn proper torque figures in addition to purpose a torque wrench to tighten nuts in addition to bolts. The parts yous are nearly to supervene upon are plastic in addition to volition deform if non installed amongst only about care. Follow all appropriate security practices in addition to retrieve that brake fluid is poisonous in addition to should live disposed of appropriately.
With 99,000 miles on my '98 A4, inwards rattling hot weather condition (>100 degrees F.), occasionally my clutch pedal would non provide later beingness depressed. I was e'er able to line the pedal dorsum upward amongst the tip of my foot, but this was becoming to a greater extent than frequent in addition to happened at bad times. It was non straightaway clear if the movement of the occupation was the master copy or the slave, but the cost of the parts suggested that both could live replaced without breaking the bank. Both parts together came to nearly $160 in addition to were delivered to my door without fuss from 1 of the many parts houses yous tin can at nowadays abide by on-line. (I used bestforeignparts.com, non the cheapest, but they include costless shipping.)
This chore volition require:
- Metric socket laid
- 6mm ball caput Allen wrench (important!)
- Small long apartment blade screwdriver
- Medium apartment blade screwdriver
- Torque wrench
- New DOT 4 brake fluid inwards sealed container (1 pocket-size tin can volition do)
The chore is pretty straightforward amongst no surprises. If you've ever replaced a brake or clutch master copy or slave on an older automobile you'll live pleasantly surprised. If you've never worked on a automobile before, larn person to expect over your shoulder in addition to learn yous how. This is likewise overnice a automobile to screw up!
Preparation for Master Cylinder Removal
Remove the knee articulation bolster / embrace nether the steering wheel. You'll abide by that at that topographic point are 4 screws total belongings it up. One is nether the fuse embrace (between the driver's side door in addition to the dash) at the bottom every bit yous confront the fuse panel. Just pry off the fuse panel embrace gently amongst your fingers; no tools required. The 4 screws that agree upward the bolster take hold 8mm heads.
Next carefully pry out the 2 plastic covers that conceal 1 screw each. Remove them in addition to run your agency to the bottom correct where you'll abide by 1 to a greater extent than screw. The knee articulation bolster volition at nowadays come upward clear except for 2 sets of connectors. One is the nether dash footlight in addition to the other is the socket for the diagnostic connector. Carefully pry the 2 clips from the lite in addition to unplug it. The diagnostic connector has a footling prong which yous gently depress to line the connector out. Remove the knee articulation bolster in addition to laid is aside inwards a build clean safe place.
The Audi manufacturing works life service manual says to take away the engine ECU to gain access to the hydraulic lines which I did, but I don't believe it's actually required. I'd live interested to know if the mechanics at the dealerships actually create this. If yous select to take away the ECU, disconnect the negative battery connection, but live certain yous take hold the radio code first.
Remove the ECU
Removing the ECU is non all that complicated but it does entail the greatest adventure of the whole chore in addition to is non for the timid. To take away the ECU yous must abide by the dark box on the driver's side nether the hood close the firewall. You may demand to take away the wiper arms in addition to the dark plastic trim down nether the wiper arms at the bottom of the windshield to access 1 of the screws. If so, carefully pry off the dark plastic covers on the wiper arms to expose the nuts underneath (12mm I think). Mark the windshield amongst only about masking record to betoken where the blades prevarication in addition to so yous tin can occupation upward the wiper arms in 1 lawsuit to a greater extent than when yous lay this all dorsum together. Once yous take hold access, take away the (5) 8mm screws in addition to carefully, amongst your hands, pry off the cover. Under the embrace is a silvery box amongst 2 connectors in addition to a strap across the module. The strap comes off amongst a gentle pushing in addition to prying amongst a screwdriver. You'll demand this in addition to so assay non to distend it likewise much when yous accept it out. You'll abide by 2 connectors on the module. Slide the T-handle levers out all the agency in addition to the connector volition line itself out. Set the module aside inwards a safe place, preferably out of the Sun in addition to dust in addition to static. So far, in addition to so good. Now for the business office I wasn't in addition to so hot to do. There are v connectors that demand to live removed to live able to line out the bottom of the dark box that contained the module. Take your apartment blade screw driver in addition to rattling carefully pry the locks from each of the connectors gently pulling the connector out of its mate. Rock the connector a footling front end to dorsum in addition to it volition come. Don't apply a lot of forcefulness in addition to assay non to bugger anything or this could larn a bigger projection that yous anticipated.
Now that all the connectors are free, yous tin can take away the (2) 10mm nuts that agree the box downwards in addition to take away it from the knob at the front end every bit well. Slide the prophylactic kicking that surrounds the cable out of the U shaped notch inwards the box in addition to the box volition come upward free. All of this only gets yous a footling to a greater extent than clearance to run on the 2 tubes that move inwards the firewall here. One is from the bottom of the brake reservoir; the other is the hydraulic occupation that runs from the master copy to the slave.
Master Cylinder Removal
Whether yous take hold removed the ECU or not, yous volition demand to disconnect the 2 lines. The hose from the reservoir is a barbed plumbing equipment that won't come upward off easily. Be certain to clamp off this prophylactic hose to foreclose brake fluid from pouring out all over. Behind the firewall in addition to business office of the replacement master copy is a plastic L shaped fitting. Mine broke every bit I was trying to take away the hose from the barbed fitting. You should non fret if it breaks but live prepared to proceed the dribbling brake fluid from hitting paint. In retrospect, it would live easier to club only about extra hose in addition to only cutting it amongst a knife rather that playing amongst the thing.
The hydraulic connexion is simplicity itself. No to a greater extent than screw fittings. These footling buggers purpose a wire clamp arrangement. Carefully slide the wire to driver's left in addition to the metallic occupation volition come upward out of the master. Again live certain to take hold a rag to protect pigment from brake fluid drips.
DO NOT DEPRESS THE CLUTCH PEDAL FROM NOW ON OR YOU'LL HAVE BRAKE FLUID ALL OVER!
Now driblet dead nether the dash. Remove the clevis pivot that holds the master copy push-rod to the clutch pedal. Pivot it upward in addition to slide it out. Then take away the (2) 6mm Allen caput socket screws that agree the master copy to the car. The 1 on the correct volition live easy. The 1 on the left volition require the ball caput Allen. There is a pump provide leap for the clutch pedal that was inwards the agency in addition to the ball caput (aka Bondus) Allen was required.
Remove the sometime master copy in addition to carefully run whatever remains of your L plumbing equipment from the slot inwards which it's retained. It's a footling U shaped cutting inwards only about canvas metallic that retains it. Push it upward in addition to out of this detent to remove.
Installing the New Master Cylinder
Your novel master copy volition come upward amongst a novel thick prophylactic washer in addition to a sparse metallic one. My sometime ones were retained nether canvas metallic when I removed the master. They expect similar they were inwards reasonable status in addition to I could encounter removing in addition to reinstalling them to live a hurting in addition to so I settled for keeping the sometime ones. I'm guessing a purist volition tell that this is a seal for water, in addition to so if yous alive where it rains a lot, expect where these items alive in addition to determine if yous desire to struggle it.
Your novel (and old) master copy is plastic. (Go figure.) It has a slice of tubing in addition to an L shaped plastic plumbing equipment at the end.
Snake the L plumbing equipment dorsum to the opening from whence the sometime 1 came, occupation upward the master copy on it's mounting holes in addition to reinstall the 8mm Allen caput bolts. Clean, lubricate (white lithium grease seemed right) in addition to reinstall the clevis pin. Go dorsum to the engine compartment, install the metallic occupation into the master copy till it stops in addition to force the wire clip dorsum to it's original position. Replace the occupation from the brake reservoir on the barbed fitting. If yous are solely replacing the master, take away the clamp, bleed the scheme in addition to clit upward the knee articulation bolster, replacing the 4 screws. Not likewise tightly, they strip rattling easily.
R&R the Slave Cylinder
If yous are replacing the slave larn underneath the car. I take hold a 2 postal service lift, but it looks similar it tin can live done on jack stands. On the left side of the transmission bell housing you'll abide by the slave in addition to the metallic hydraulic line. This occupation connects to the slave inwards the same agency every bit to the master, amongst a wire retainer. Carefully slide the servant aside. Be gentle; mine decided to wing off in addition to it took 10 minutes of frantic looking amongst magnets in addition to mirror to abide by it. If yous lose it, fearfulness not, a novel 1 comes amongst the novel slave. Again, live certain to take hold a rag create to take take hold of whatever brake fluid that dribbles out of the line.
Remove the 1 6mm Allen caput bolt in addition to take away the slave. There is a metallic bracket attached to the slave that retains the metallic line. After the screw is out gently angle both the slave in addition to the bracket to take away it from the line.
Installation of the slave was rattling simple, but at that topographic point is only about preload, in all likelihood the clutch fork, in addition to so it requires a footling see to occupation upward the 2 mounting holes again. It'll solely accept your hands. Line upward the hole, screw dorsum the Allen caput bolt, skid the metallic occupation onto the metallic servant bracket, insert the hydraulic occupation dorsum into the slave in addition to displace the wire servant dorsum into position.
Bleed the scheme
If the clamp on the occupation from the reservoir is however on, brand certain all your hydraulic connections are properly connected in addition to take away it. I purpose an inexpensive force per unit of measurement area bleeder. They tin can live had for nearly $40 on the web. You are going to bleed your brakes someday; this is a skillful tool in addition to a fair price. Only purpose DOT 4 brake fluid. I purpose Castrol, but live certain to purpose novel high character DOT 4 fluid from a sealed can. With the force per unit of measurement area bleeder inwards house in addition to pumped to 15-20 lbs. larn dorsum nether the automobile in addition to opened upward the bleeder valve. (Use a hose in addition to a take take hold of bottle. Please encounter instructions elsewhere for haemorrhage brakes in addition to clutch's.) Once all the air is out, unopen the bleeder, build clean upward in addition to experience that novel pedal feel.
My sometime pedal experience was horrible in addition to the divergence betwixt sometime in addition to novel quite surprising. It takes much less pedal forcefulness now.
ECU replacement
If yous removed the ECU, the connectors in addition to the ECU box, at nowadays is the fourth dimension to lay that all dorsum together. Put the box dorsum inwards it's original position, supervene upon the 2 10mm nuts in addition to don't over tighten. Use a torque wrench. Reinstall each of the color coded connectors into their proper location. You should listen a click when the seat, but yous tin can also encounter that they are all the same meridian when they are properly seated. Reconnect the ECU itself in addition to restore it to it's proper location beingness certain to reinstall the metallic strap over it. Replace the plastic embrace in addition to supervene upon the screws. DO NOT OVER TIGHTEN. These screws are tightened to a rattling depression torque value. Use a torque wrench or live rattling gentle. You desire this box to seal properly in addition to yous create non desire to strip the plastic.
Replace the dark trim down in addition to the windshield wiper arms using the masking record to occupation them upward inwards the correct place.
Reconnect the negative battery lead. My figurer did non throw whatever DTCs, (diagnostic problem codes, AKA banking concern check engine light) but the Audi manual says it could. Be prepared for this. If yous don't ain or take hold access to 1 of the many skillful applications for the PC or PDA that connects to your car, yous may demand to accept it to the dealer to clear the code or codes.
Enter your radio code. See radio owner's manual for instructions.
Reset your clock.
Please experience costless to driblet me a banking concern annotation to enjoin me if this physical care for was helpful. I'd also peculiarly similar to listen from anyone who does the chore without removing the ECU.
Thus the article Best Audi A4 B5 Replacing The Clutch Master/Slave Cylinders
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