Metric brake calipers?

Tom W

Active Member
I’m replacing all the rigid brake lines on my car as the original steel lines are getting corroded. I need to work out if my car has metric or imperial calipers. The workshop manual says later 2000s and 2200s may have metric calipers. The 2200 parts book only gives one part number for each of the front calipers, and one part number for each of the short rigid pipes between the upright and caliper.

Comparing what’s come off with the workshop manual, the female end of the pipe looks imperial, and the male end looks metric. Does this sound right, the rigid pipe was an adapter? My car is 1976, so a fairly late build. Are there any identifying marks on the calipers themselves?

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I suspect the parts book will show only the latest replacement calipers at the time, which would be metric. Also looking at the parts book the flexible's have imperial retaining nuts which would support your findings. I have some pipes off my Land Rover & they are imperial one end and metric the other. I keep a stock of both metric and imperial tube nuts to hand as I have vehicles with both types. Saves me having to sort out exactly which beforehand . But now some have ABS , which have different size male nuts again, I believe its to stop the wrong connections being made.
 
Thanks. I think my calipers are probably metric. I tried some imperial bleed nipples in them, and they’re noticeably looser than the ones that came out. I will buy both metric and imperial fittings and try them both. If the metric ones fit, the calipers must be metric, since according to the manual, a male metric fitting won’t go into a female imperial hole.

I also found this on the web
 
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