Printable Version of Topic

Click here to view this topic in its original format

914World.com _ 914World Garage _ Master Cylinder crush washers

Posted by: 76-914 Jul 17 2018, 03:23 PM

I need to replace the crush washers used by the banjo fitting on the brake MC. They're 2 different sizes and are solid copper washers. Porsche pn# 904 351 534 00 & 904 355 902 00. Are ya'll using the OEM washers or the more common copper hollow crush washers such as Bel Metric's for replacements? TIA, Kent

Posted by: 914Sixer Jul 17 2018, 04:05 PM

Common washers

Posted by: mepstein Jul 17 2018, 04:30 PM

We use Wurth but probably because they come in a box with 30 or so sizes with labeled compartments. Makes it easy.

Posted by: Chris914n6 Jul 18 2018, 12:07 AM

Standard banjo washers. Used on power steering pumps, auto trans cooler lines and more. I'd say get copper as aluminum would likely corrode badly down there.

Posted by: bulitt Jul 18 2018, 06:38 AM

You can reuse the current ones. (if Copper)
Lay them flat, heat with a propane torch until red. They resume original shape.

Or- this from Harbor Freight if you stay copper?

https://www.harborfreight.com/80-piece-copper-washer-assortment-67526.html

https://www.youtube.com/watch?v=RMLqlDSsQpA

Personally I lay them flat so they don't fold over when heated.

Now I know many will say- why anneal a washer when they are so cheap?
Try finding an off size copper washer for a 1983 Ferrari 512BBi Dry Sump drain plug.
As an example.
Anneal, or make your own.

Posted by: 76-914 Jul 18 2018, 09:01 AM

I didn't see them on Bel Metric as I searched for copper crush washers. Later I googled "flat copper washers" and lo and behold it sent me to Bel Metric. My mistake because of the wrong terminology. I ordered several because they're cheap. Bob, naturally I thought about annealing them and may still do so if the new ones aren't spot on. BTW, you needn't go to cherry red. Move the torch tip in a slow fanning motion. Once you see the "blue hue" following the torch tip the copper is annealed.