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One caliper hard to bleed

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
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E Showell
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E Showell

Re: One caliper hard to bleed

Post by E Showell » Mon Apr 23, 2018 2:31 pm

Rebuilt calipers, regardless of source & "brand" never seem to last me more than about 2 years.
'98 V70 NA FWD 5 spd, silver sand metallic (sold)
'99 V70 NA FWD Auto, dark blue (actively for sale)
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abscate
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abscate

Re: One caliper hard to bleed

Post by abscate » Mon Apr 23, 2018 8:39 pm

My Cardone front calipers are going on 4 years 40k miles
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theWIFES_S70
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theWIFES_S70

Re: One caliper hard to bleed

Post by theWIFES_S70 » Mon Apr 23, 2018 11:24 pm

My FCP Cardones are at 3 yrs now... They are rusted to all hell though.
1998 Volvo S70, N/A, 5-speed, 183K
2007 Volvo S40, 2.4i, 5-speed, 97K

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mrbrian200
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Re: One caliper hard to bleed

Post by mrbrian200 » Tue Apr 24, 2018 1:01 am

If the caliper compresses normally/easily with the bleeder screw open, but bleeds difficult via pressing the brake pedal then it's almost always the brake hose that's bad. The internal rubber hose swells. Because it's surrounded by a steel reinforcement that can't expand the swelling collapses the center passage that normally carries the brake fluid. Sometimes there's a cause for it (incorrect brake fluid or moisture intrusion) Sometimes it just happens. Other possibilities (less likely but if after removing the flexible brake hose you still have trouble pressing fluid through the line) are a problem with the master cylinder, ABS module, or a kinked/crushed steel brake line somewhere between the master cylinder and the flexible hose that reaches out to the wheel/caliper in question.

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Re: One caliper hard to bleed

Post by jimmy57 » Tue Apr 24, 2018 5:48 am

In addition to hose issues the ABS module can have a sticking valve. Someone needs to press brake pedal and then loosen the line for the RR caliper to see that fluid comes out with force. The person depressing pedal should hold constant pressure when this is done and should not let off until you secure the line connection.

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Re: One caliper hard to bleed

Post by rguzz » Tue Apr 24, 2018 9:32 am

Lots of useful info on this thread, very nice.

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