1970 911 S Targa - Putting Everything Back Together

[GreasyWrench89]

Hi Everyone,

I am helping my father put his 1970 911 S Targa back together. Engine has been rebuilt and will be shipped to us soon. In the meantime we have to prep the car that has been sitting for the past 20+ years.

To start with we'll need to replace most if not all the brake hard lines and flex hoses. Rebuild the brake calipers, master cylinder and replace all the drum hardware and shoes (maybe wheel bearings too). We're glad to see we can order most of everything we need on Pelican Parts. Picked up two books to helps us through the process. 101 Projects for Your Porsche 911, 1964-1989 (Motorbooks Workshop) Motorbooks Workshop and PORSCHE 911 2.0 - 2.2 - 2.4 LITRE 1964-1973 WORKSHOP MANUAL. If there are other literate that we should invest in, please advise.

One of the front calipers is missing its piston. Remainder of caliper pistons are steel and are in good shape, but I am unable to find a replacement. Should we replace all with aluminum instead? Calipers are S calipers from the looks of it, 3.5" between the mounting holes and (although hard to see) part number 26087 4

Thanks in advance for any help or tips. Greatly appreciate it.

[jaycee1977]

Have you spoken to the folks at PMB about your caliper piston?

Sounds like a great family project, I wish you all the very best with it.

JC

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[GreasyWrench89]

Originally Posted by jaycee1977

Have you spoken to the folks at PMB about your caliper piston?

Sounds like a great family project, I wish you all the very best with it.

JC

Sent from my SM-G998B using Tapatalk

I guess no one uses stainless steel brake pistons anymore. Which makes sense considering the different materials piston vs. caliper

One thing I did notice is the pistons that I removed from the caliper had a pin of some sort inside held by a retaining ring. Any idea what that is or if its needed?

[Bobboloo]

Stainless steel pistons are available and a good replacement. The original steel plated pistons can rust and pit. You want to avoid an aluminum piston since the caliper is aluminum and galling can occur.