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850 / S70 & V70 '96-'99 / C70 '97-'05 General Forum for the 850 and P80-platform 70-series models |
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V70XC rear brake bleed questiionViews : 1767 Replies : 31Users Viewing This Thread : |
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May 15th, 2021, 12:41 | #1 |
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V70XC rear brake bleed questiion
Hi Folks,
I've got a soft brake pedal and while not certain, I'm thinking some air has got into the system after recent rear brake overhaul work. In any case, I think bleeding the brakes is a worthwhile thing to do and can't hurt. Might sound daft but I've not bled rears before with 2 nipples per side - is there any order (eg top then bottom or v/versa?) Cheers, Nick |
May 15th, 2021, 12:50 | #2 |
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Last Online: Mar 18th, 2024 16:26
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If the nipples are one at the top and one at the bottom, you only need to do the top one. The bubbles will make their way to the top anyway and so any air will exit by the top nipple. One less to seize and shear off as well!
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1997 V70R AWD, Saffron, Manual; Lotus Carlton; Ascona 400; Mini Cooper S Works; 4.2 Supercharged Range Rover; Land Rover Discovery 4; Suzuki GSF1200N; BMW R80/7; Velocette Venom; Daimler V8 250. |
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May 15th, 2021, 13:47 | #3 |
Classic P80 1999 BiFuel
Last Online: Mar 6th, 2024 01:34
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Location: 48mph Middle Lane M4
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These cars can be a pig to bleed. I read somewhere that bleeding these cars is better achieved with the front elevated on ramps, and this helped in my case.
Another old-sweat's trick: Sometimes it works, sometimes it doesn't... pump rapidly on the pedal for 10 secs to atomise air into thousands of minute bubbles, these bleed more easily than one or two stubborn air-pockets. It can take 5 minutes for air to return to contiguous pockets. Rinse & Repeat. Pressure-bleeders are best for most jobs, but if it's really stubborn follow with vacuum, using a MityVac or similar. If that fails, feed-up using the Mityvac's reverse funtion. ie put fluid in at the nipple end, and push the air up - the way it wants to go naturally - into the reservoir. But make sure there's no cr*p in the nipples or you'll soon be cryin' in your beer.
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Bifuel V70 Classic 1999 [The Old Grumpy in the Corner, "When I was a lad... blah, bl**dy blah."] Last edited by CNGBiFuel; May 15th, 2021 at 14:01. |
May 15th, 2021, 15:29 | #4 |
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I found when using a pressure bleeding system that a low pressure and go round all wheels and do it again a couple of times did it best.
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David V70 2.5 10v Torslanda Manual 98 Sreg |
May 15th, 2021, 16:22 | #5 |
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Seconded. I use my Gunson Ezibleed and it's a totally straightforward job, no dramas.
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May 15th, 2021, 20:50 | #6 |
Classic P80 1999 BiFuel
Last Online: Mar 6th, 2024 01:34
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Location: 48mph Middle Lane M4
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Agreed, they're a long way from the hardest vehicles to bleed, many other makes are far worse.
After swapping an ABS unit I was struggling with mine. My pressure-bleeder got there, but not quite. Nothing really worked. Read about the 'ramp thing'. With nothing to lose, I parked nose-up on a very steep incline. Rapid-prodded the pedal - and finally got a solid pedal. I'm not fan of the Gunson Eezibleed, but when they work, they work well. . Seem to leak after 3-4 uses, and the pricier alternatives are not much better, I wound-up making a home-brew with a garden-sprayer, and the remnants of my various presure-bleeders.
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Bifuel V70 Classic 1999 [The Old Grumpy in the Corner, "When I was a lad... blah, bl**dy blah."] Last edited by CNGBiFuel; May 15th, 2021 at 20:56. |
May 15th, 2021, 21:16 | #7 |
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I've used the Sealey VS820 for 6 years and it's never failed me on any car or van. It also fits my cooling system for quick and easy pressure testing.
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2002 S60 SE D5 Manual 209000 miles |
May 15th, 2021, 21:18 | #8 |
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Last Online: Mar 16th, 2024 23:42
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Thanks for all the advice folks. Got to say I'm not looking forward to the job as the nipples on the rear offside have had no dust covers on for what seems a long time - really poor condition. Maybe the smart move is to order some spares before I start...
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May 15th, 2021, 22:44 | #9 |
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I know all about that! Having spares handy won't do any harm, or at least give the rusted bleed nipples a generous coating of penetrating fluid a good few hours before you plan on tackling the work.
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2007 (P3) Volvo S80 SE 2.4D (163bhp) - 109,000 miles. Black exterior with cream leather interior. |
May 16th, 2021, 00:07 | #10 |
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Last Online: Feb 20th, 2024 10:47
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The Gunson failed me, on my V70, although no air was coming out of the rears, the (a little from the fronts) its still soft pedal :/
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Regards, Bashy MY07 (56 plate) V70 Geartronic 2.4 D5 185bhp 173k, 17", full leather, an auto-dimming mirror and auto wipers are the best it can do - I have added (poorly) limo black, rear camera and parking sensors |
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