Hi,
Any recommendations on who to send my calipers out to for anodizing? I need the front S units and the rear M units done (1970 911). I am doing the rebuild myself.
Rick
Hi,
Any recommendations on who to send my calipers out to for anodizing? I need the front S units and the rear M units done (1970 911). I am doing the rebuild myself.
Rick
Eric at PMB Performance!
http://www.pmbperformance.com/calipers.html
1971 911S, 2.7RS spec MFI engine, suspension mods, lightened
Early 911S Registry Member #425
You really can't anodize steel, which is what the M calipers are made of. But you knew that.
jhtaylor
santa barbara
74 911 coupe. 2.7 redone by Competition Engineering; ported to 36mm, shuffle-pinned, boat-tailed, Elgin mod-S cams, J&E 9.5's, PMO's.
73 Targa (much beloved, sold and off to a fine new home in San Francisco)
thanks for the guidance to Eric. Yes, I knew that but included the M as an afterthought as they need restoring as well.
When calipers are Zinc plated, do you have to disassemble the caliper halfs or can you plate them as
a unit? Also, what happens to the insides such as where the piston rides? When you plate them, do you have to re-hone the cylinder?
Mark Erbesfield
2018 911 Carrera T 7spd manual 😊
1973 911S #9113301282
1957 356A #58648
1966 Toyota Land Cruiser FJ45LV
1982 Toyota Land Cruiser FJ40
1977 Toyota Land Cruiser FJ40
1972 Toyota Land Cruiser FJ40 FST (Factory Soft Top)
1971 Toyota Land Cruiser FJ40 “Patina Queen”
1979 MB 450SL "Dad's old car"
2019 Cayenne "Wife's car"
Read the "rebuild calipper" tread by search.
http://www.early911sregistry.org/for...build+calipper
Our expert Neunelfer will explain about honing/zinc plating cylinders etc.
Best
John
Early 911S Registry #931
--------------------------------
1971 911 2.2S Coupe Albert Blue
1971 911 2.2T Coupe Tangerine
2005 997 C2S Coupe special 1965 slate grey
1978 911 3.0 SC Targa Silver w/chrome trim
John, Thanks for pointing me in the right direction. I now remember reading that thread way back when, so much to remember. Today I disassembled all my calipers and unfortunately one cylinder refused to come out. No amount of pressure would pop it out. I ended up having to beat it out with a punch from the back side. Of course it destroyed the piston and marred the cylinder wall. I am hoping Neunelfer will chime in hear and give advice. What I need to know is can the damage be honed level and will it perform ok or do I need to find a replacement. We spent hours trying to get the darn thing out before resorting to the punch. Calipers go to the Platter tomorrow so if I have to find a new one, it will have to be plated separately, which will suck. Also, need to know if my cylinders are usable or not. They look pretty bad. See pics. Thanks for the help.I just realized I forgot to take pics of the pistons, other than the one that was destroyed. I will post them tomorrow. They were corroded along the edges pretty badly and it looked like some of the plating? was flaking off. No where close to looking as nice as they ones you started with.
Mark Erbesfield
2018 911 Carrera T 7spd manual 😊
1973 911S #9113301282
1957 356A #58648
1966 Toyota Land Cruiser FJ45LV
1982 Toyota Land Cruiser FJ40
1977 Toyota Land Cruiser FJ40
1972 Toyota Land Cruiser FJ40 FST (Factory Soft Top)
1971 Toyota Land Cruiser FJ40 “Patina Queen”
1979 MB 450SL "Dad's old car"
2019 Cayenne "Wife's car"
Interesting. The Steel/Steel M caliper was the one with the most corroded piston/cylinder? Not the Aluminum/Steel S caliper?
1971 911S, 2.7RS spec MFI engine, suspension mods, lightened
Early 911S Registry Member #425
I thought I would post a quick update. I took the calipers to be plated, but the Plater did not have success. The plating would not stick to the calipers? He said there must have been some sort of coating or something. He asked me to bead blast them, which I have done, and bring them back. What was strange was the fronts took the plating about 80%, the rears would not take any plating at all. They looked like they had been cooked and were covered in rusty/dirty scale. They blasted clean very easily though. I don't recall reading in Eric's posts where he blasted the calipers prior to plating. The Plater dips all the parts in some sort of cleaner or acid which is suppose to strip the old finish. Not sure of the details but will ask more questions when I take them back.
Mark Erbesfield
2018 911 Carrera T 7spd manual 😊
1973 911S #9113301282
1957 356A #58648
1966 Toyota Land Cruiser FJ45LV
1982 Toyota Land Cruiser FJ40
1977 Toyota Land Cruiser FJ40
1972 Toyota Land Cruiser FJ40 FST (Factory Soft Top)
1971 Toyota Land Cruiser FJ40 “Patina Queen”
1979 MB 450SL "Dad's old car"
2019 Cayenne "Wife's car"
I ran into the same issue with some early cast iron calipers off of my '67 S a few years back . Excellent plater with prior experience with a lot of my plating, including clear and yellow zinc, black oxide, and some actual cadmium. No rhyme nor reason why the calipers would not take the zinc. On his suggestion we (he) tried yellow cadmium....it took! Slightly duller in lustre, and technically not correct, but it worked. All my stuff is bead blasted before plating, and you just need to knock off the plating in the bores with a small hone before assembly. By the way, in one of your photos there's a pretty signifigant gouge in the caliper bore that looks like it might compromise the seal. I wouldn't use it! That much corrosion with steel on steel is indicative of infrequent bleeding/flushing and funky fluid...MOISTURE! Remember brake fluid is hydrophilic.
Mark Smedley
'59 VW Typ I
'69 911T 2.7
'86 930
'04 GT3
'16 Boxster GTS
'08 MBZ AMG CLK 63 Black Series