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Guest Message by DevFuse

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EA81 vented disc upgrade for gen 1/gen 2 vehicles with solid rotors

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1 reply to this topic

#1 Caboobaroo


    USMB Drunk

  • Members
  • 7,157 posts
  • Oregon City

Posted 11 January 2006 - 06:40 PM

Very easy I must say but you must get a few parts from a donor vehicle ("83 and newer EA81) before starting.
You'll need:
left/right vented rotors/hub assembly
left/right calipers
The reason for the calipers off of the donor vehicle is because the vented calipers are a little wider then the solid calipers. If you compare the vented rotors to the solids rotors, you'll see a major thickness difference.

Tools you might need:
36mm socket for the castle nuts
14mm wrench
Pliers for removal of e-brake cable
12mm wrench if you need it

new cotter pins or reusable cotter pins for the castle nuts
new brake pads
turned rotors

Jack up vehicle and put on jackstands
Remove front wheels
Remove e-brake cables from calipers
Disconnect brake lines from calipers (you can remove them from the back of the calipers)
Unbolt the calipers and remove
Unbolt the axle castle nut and remove rotor/hub assembly
Install the vented rotor/hub assembly
Install new calipers
Install e-brake cable
Connect brake lines
Bleed brakes in this order: Passenger rear, driver rear, passenger front, driver front
Now go out and test your car's braking once you get everything else buttoned back up. This mod is great for a brake upgrade and less likely to warp rotors too under heavy braking. Gen 1 cars wil now stop a lot easier and combining this upgrade with the rear disc conversion on a gen 2 vehicle will make it stop on a dime.

In mid '83 is when the vented front rotors came out. Earlier '83 EA81s don't have vented rotors so ake sure you check the build date.

#2 Ross


    Can't be bothered

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  • 1,865 posts
  • Christchurch, New Zealand

Posted 15 January 2006 - 12:14 AM

Just a note on the "83 and newer" bit: not all '83s have vented discs (my ea81t wagon doesn't) - so look before you buy!

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