The day my "onboro ALFA" would revive

The overhaul of the clutch master cylinder , which I succeeded in the removal and repair of the piston with solder ( probably ), has been still continuing.  The master cylinder was disassembled and all parts were cleaned.  The condition of each part was not bad. In the last week the cylinder and rod were painted. Assembly started.  I checked the condition of the rubber parts originally used comparing with ones of the repair kit.  And I decided to use the original ones because the rubber was not deteriorated yet and the quality looked better than the repair kit ’ s one. Always the assembly is fast although I always struggled with the disassembly. Before After The overhauled master cylinder could be operated smoothly.  And I believe the appearance also became cleaner. ( My original blog was written on 26th Jul. 2009 )

I was still struggling with the sticking piston of the clutch master cylinder. I thought I should give up and look for the new part for the replacement.  And to for my curiosity , I started to destroy and disassemble the clutch master cylinder piston by drilling. When I was drilling the piston halfway , I didn ’ t have any specific idea , however , I thought to tap the piston to make the thread.  I started to turn the tap handle , and I felt the feeling that the piston was moved.  So , I tried to pull it , and then suddenly the piston was removed from the cylinder. Finally I could extract the rusty piston! I observed the extracted piston.  It looked there was no risk of the leakage of the fluid because the hole I made in the piston was not penetrated.  Thinking the function that this part only holding the rod connected with the clutch pedal , it could be reused if the hole would be filled by the hard material. However , before repairing the holed

I disassembled the removed clutch master cylinder. And I found that the piston was heavily rusted. I tried to hit it with a hummer , Pushed the piston using the vise clamp like this.  However , the piston was heavily sticking by rust and it could not to be moved today. The brake master cylinder was replaced in the past , however , the clutch master cylinder was not.  Therefore , the condition of the clutch master cylinder might be worse. Tentatively , I would spray the rust-penetration lubricant from both sides of the piston and try again in a few days. If it doesn ’ t work , I would give up the overhaul and order the new part. ( My original blog was written on 2nd July 2009 )