Plain Cap for Master Cylinder

[JMI]

Want to make a pressure brake bleeder. Where can I get a plain cap - without the switch, to fit a 1989 535 master cylinder reservoir?

TIA

[BMWCCA1]

How 'bout the lid off a 540i 6-sp clutch reservoir?

COVER LID 21521119541 $3.11

It's the same part number for an older 2002/1600 before they used the dual-circuit brakes. (I haven't tried it, but it's a guess)
OE part for only $3? For everything else there's Master Charge!

[yaofeng]

The 540 6 speed clutch fluid reservoir is different. There is no sensor connection on the cap and the size is also different.

[Dave M]

Want to make a pressure brake bleeder. Where can I get a plain cap - without the switch, to fit a 1989 535 master cylinder reservoir?

TIA

Have you thought about using a short length of coolant hose? Its not pretty, but an old upper rad hose fit the resevoir in my M50 snug. I then used additional rubber to fit it to the compressor end. Worked well enough. Just watch the pressure

Dave M

[JMI]

Just returned from the local hardware and also the local Schuck's Tried a ouple of caps - no luck.

If I knew the correct size and thread pitch of the cap life would be easier

The jury rigged thing with the hose is a last resort

Thanks

[yaofeng]

Most european cars have the same cap. I know my SAAB's do. You can go to a junkyard and expand your search if you have time.

[Bellicose Right Winger]

I use a Motormite 42035. Sold under the HELP! label at PepBoys. It also fits '88 -'90 full size Buicks, Cadillacs, Oldsmobiles and Pontiacs. It doesn't come with a gasket (Motormite 42104) and it has a vent notch in the gasket surface that must be filled. The silicone I used to hold rubber gasket in place fills notch nicely. Drill a hole, insert a tire valve stem, hook up a compressor (10 PSI max!) or bicycle pump and you've got a simple, effective one-man brake/clutch bleeder.

Paul Shovestul

Want to make a pressure brake bleeder. Where can I get a plain cap - without the switch, to fit a 1989 535 master cylinder reservoir?

TIA

[JMI]

Hey Bellicose, You da Man