Size & Threading of Brake Bleed Nipples - Alfa Romeo Bulletin Board & Forums
 
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post #1 of 9 (permalink) Old 09-15-2019, 10:07 AM Thread Starter
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Size & Threading of Brake Bleed Nipples

PO changed rear brakes on my Duetto from Dunlop to ATE -- front is still Dunlop. I would like to install bleeding nipples (Speed Bleeders?). Is the threading and size of nipples the same on Dunlop and ATE calipers? Any suggestions on sourcing the bleeders? Thanks.

jim lehman
'67 Spider Duetto
'86 Spider Veloce
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post #2 of 9 (permalink) Old 09-15-2019, 10:44 AM
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I don't recall the size, but I used Speed Bleeders on the Spider in the past. They're fine, but I've had much better and easier results with pressure bleeding, and if you're going to spend money I'd recommend putting it towards a pressure bleeder.

They are not that expensive, just make sure you get one that'll fit your master cylinder. I know the one below will fit at least the later Alfa brake and clutch MCs.

https://www.amazon.com/Motive-Produc...8569338&sr=8-2

Tom

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post #3 of 9 (permalink) Old 09-15-2019, 03:04 PM
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Or this.

https://www.harborfreight.com/brake-...der-92924.html

It's Giuseppe's giubos, not Guido's guibos, on my 78 Spider and Sport Sedan
REFRESH CONNECTIONS BEFORE REPLACING COMPONENTS
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post #4 of 9 (permalink) Old 09-15-2019, 03:15 PM
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Or this! Mityvac. Have used one of these for years to bleed brakes, look for vacuum leaks, etc
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post #5 of 9 (permalink) Old 09-15-2019, 03:41 PM
But Mad North-Northwest
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I have a vacuum bleeder too. It's useful in some cases like the 101, where the pressure bleeder doesn't fit the MC. But the pressure bleeder definitely works better and is easier to use.

Tom

1963 Giulia Spider (1750 engine)
1974 GTV
1991 Spider
Former: 1987 Milano Gold
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post #6 of 9 (permalink) Old 09-15-2019, 03:45 PM
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They do look pretty trick, I've never used one. They look like a mini Hudson sprayer... 👍
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post #7 of 9 (permalink) Old 09-15-2019, 04:27 PM
But Mad North-Northwest
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They work well, but do require a bit of caution. You don't want to over pressurize the MC, you need to make sure the attachment to the MC is secure, and you need to remember to relieve pressure by removing the pump handle piece, not the screw-on piece at the MC. But it definitely works the best of all the methods I've tried.

Tom

1963 Giulia Spider (1750 engine)
1974 GTV
1991 Spider
Former: 1987 Milano Gold
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post #8 of 9 (permalink) Old 09-16-2019, 05:26 AM
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Jim,

I just bled the brakes on my Duetto. Among others, I have a Blue Point Power Bleeder and a Mightyvac but I like the 'Speed Bleeder' / Dorman 'Quick Bleeder' better. My car has Dunlop brakes at all four corners and uses part number 12701. The Speed Bleeder and Quick Bleeder have the same part number. Although I used the same part number (Speed Bleeder) on the Touring Roadster; I can't say if it will fit your Ate' brakes or not. It is probably best to do a through comparison of the two or take one of your old Ate' bleed nipples to the store with you to match it up with a Speed or Quick Bleeder.

Mark
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post #9 of 9 (permalink) Old 09-18-2019, 01:20 PM Thread Starter
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Thanks...

...for all your suggestions. Does anyone know the bleeder nipple part number for rear ATE's?

jim lehman
'67 Spider Duetto
'86 Spider Veloce
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