Rover SD1 Clutch Slave Fitting

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bigdawgv8
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Rover SD1 Clutch Slave Fitting

Post by bigdawgv8 »

Hi All,

I’ve just bought a genuine SD1 clutch slave cylinder off the Bay of E.

The port for the flexi pipe appears to be about 1/2 inch diameter but isn’t unf so assuming it’s metric fine?

Can anyone confirm the thread size please?

Thanks for the help.


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richyb66
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Re: Rover SD1 Clutch Slave Fitting

Post by richyb66 »

Pretty sure it's 7/16" UNF

harvey
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Re: Rover SD1 Clutch Slave Fitting

Post by harvey »

richyb66 wrote:
Mon Dec 10, 2018 9:11 am
Pretty sure it's 7/16" UNF
It's not UNF, because I used an SD1 slave cylinder on a P6B 3500S LT77 conversion and I had to fit the SD1 fitting on to the end of the clutch hose.
I'd say it's a fine Metric.

DaveEFI
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Re: Rover SD1 Clutch Slave Fitting

Post by DaveEFI »

I'm fairly sure all the SD1 brake etc fittings are metric. But there is a UNF size very easily confused with it, and even has the same TPI, so sort of fits.
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ged
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Re: Rover SD1 Clutch Slave Fitting

Post by ged »

M12 X 1 definitely as I've just measured a spare.
Last edited by ged on Wed Dec 12, 2018 10:56 am, edited 1 time in total.

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Re: Rover SD1 Clutch Slave Fitting

Post by DEVONMAN »

richyb66 wrote:
Mon Dec 10, 2018 9:11 am
Pretty sure it's 7/16" UNF
7/16" unf is the size of the thread on the very similar cylinder used on Defenders etc.
Genuine SD1 cylinders have an M12 thread.
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richyb66
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Re: Rover SD1 Clutch Slave Fitting

Post by richyb66 »

I'm amazed anyone at rover in the 70's knew what a metric thread was.

When I fitted my helix clutch last winter I had to swap the SD1 Master Cylinder for a bigger bore Defender V8 one because you couldn't physically press the clutch pedal. The inlet sizes were different so I ended up getting a new hose made - they don't make these things simple do they?

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Re: Rover SD1 Clutch Slave Fitting

Post by DaveEFI »

The SD1 is of course BL rather than Rover, and was designed when metric was coming in. Pretty well all of it is metric, except the RV8.
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