Author Topic: 1968 disc brake proportioning valve big nut (Read 6313 times)

john302 · « **on:** December 06, 2009, 02:26:21 AM »

What is the correct plating on the proportioning valve big nut ?It is for my Dec.67 built 68z. I always thought silver zinc was correct,but the one I just took apart is gray phosphate. Has anyone else seen this before? Thanks John

JohnZ · « **Reply #1 on:** December 06, 2009, 04:38:46 PM »

Photo below is my '69 - the master cylinder and booster have been restored, but the metering valve is original and has never been touched.

sd1968z28 · « **Reply #2 on:** December 07, 2009, 06:54:05 PM »

i think my 68z built in april it was plain cast color.

Jerry@CHP · « **Reply #3 on:** December 07, 2009, 09:41:11 PM »

67 and 68 nuts were not plated silver cad like the '69s. The '69 nuts are also larger in dia.

Jerry

john302 · « **Reply #4 on:** December 10, 2009, 05:29:41 AM »

Is gray phosphate the correct plating?

68Zproject · « **Reply #5 on:** December 10, 2009, 11:08:55 PM »

Mine was just bare metal, but who knows what it looked like when it left the factory.

Pex68 · « **Reply #6 on:** December 20, 2009, 10:27:10 PM »

Here's some pic's of a NOS one. The plating is more of a tin-zinc that's not been buffed or tumbled.

Jerry@CHP · « **Reply #7 on:** December 21, 2009, 03:53:20 AM »

They were not plated in '67 and '68.

Jerry

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Author Topic: 1968 disc brake proportioning valve big nut (Read 6313 times)

john302

1968 disc brake proportioning valve big nut

JohnZ

Re: 1968 disc brake proportioning valve big nut

sd1968z28

Re: 1968 disc brake proportioning valve big nut

Jerry@CHP

Re: 1968 disc brake proportioning valve big nut

john302

Re: 1968 disc brake proportioning valve big nut

68Zproject

Re: 1968 disc brake proportioning valve big nut

Pex68

Re: 1968 disc brake proportioning valve big nut

Jerry@CHP

Re: 1968 disc brake proportioning valve big nut