Home > Technical (L322) > Brake pedal sinks to floor |
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Scouse Exile Member Since: 09 Dec 2022 Location: East Midlands Posts: 275 |
Hi Ian,
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7th Aug 2024 7:05pm |
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Dolphinboy Member Since: 07 Dec 2009 Location: Bristol Posts: 3127 |
master cylinder. get it checked out soonest by a pro - you don't want to find problems when it goes wrong at 70mph. |
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7th Aug 2024 7:26pm |
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Ian_D Member Since: 07 Aug 2024 Location: Barnsley Posts: 8 |
Thanks both.
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7th Aug 2024 8:25pm |
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nicedayforit Member Since: 11 Jun 2011 Location: Beside the Solway Posts: 3969 |
As well as the master cylinder I’d also be inclined to check all the brake pads, they tend to cause odd symptoms particularly if the have been overheated for any reason. |
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8th Aug 2024 6:48am |
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Dolphinboy Member Since: 07 Dec 2009 Location: Bristol Posts: 3127 |
my master cylinder was diagnosed by my indie LR expert. he said it is probably letting a little air in. He has over 20 years LR experience so I believe him. get a gen OEM if you can. |
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8th Aug 2024 6:54am |
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Scouse Exile Member Since: 09 Dec 2022 Location: East Midlands Posts: 275 |
Given it’s a fairly inexpensive job I think I’ll replace mine also. The fluid change definitely improved the feel but it’s still “soft” initially on start up. The actual braking is fine but for the sake of £200 I think it’s a good investment.
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8th Aug 2024 7:09am |
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JayGee Member Since: 27 Jul 2021 Location: London Posts: 3169 |
Mine needs doing as it keeps loosing vacuum overnight but the hydraulic system is fine so I have been putting it off. Not worth trying to save money on such a critical component so just go with OE. 2012 TDV8 Vogue (L322) |
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8th Aug 2024 8:31am |
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Barmybrummie Member Since: 03 Apr 2021 Location: Somewhere in the valleys Posts: 653 |
Some of you say you've had a brake fluid change, now when I've asked a couple of Indy's about doing it they suck in air through they teeth and moan about that's a right pita. Is this actually true? |
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8th Aug 2024 11:23am |
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JayGee Member Since: 27 Jul 2021 Location: London Posts: 3169 |
Yes it can be difficult as there is a procedure to purge the ABS via the GAP IID tool and the bleed screws have a habit of seizing in the front calipers requiring removal from the car and new threads cutting for larger bleed screws. 2012 TDV8 Vogue (L322) |
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8th Aug 2024 11:43am |
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Ian_D Member Since: 07 Aug 2024 Location: Barnsley Posts: 8 |
I assume the JLR SDD will have the options for purging the ABS? Still need to work out how to use it as its a bit OTT!
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8th Aug 2024 4:00pm |
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Scouse Exile Member Since: 09 Dec 2022 Location: East Midlands Posts: 275 |
I honestly didn’t give it a thought, normally I use LR specialists but recently started using my local garage (who also operate a haulage business) and they didn’t complain about doing it. I doubt they have LR specific diagnostics so how it was done I don’t know. I still can’t make my mind up as to whether the MC is bad, the pedal is rock solid when the car is up and running - just the initial start up where it’s soft and tends to travel down slowly. If the MC was bad why do I only get the symptom that Ian gets on initial start up? Would a bad MC not be a little soft at other times? J |
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8th Aug 2024 6:54pm |
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mjdronfield Member Since: 04 Nov 2011 Location: Derbyshire Posts: 7773 |
My Indy took a few attempts to bleed mine properly, and they had all the kit…..
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8th Aug 2024 7:10pm |
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nicedayforit Member Since: 11 Jun 2011 Location: Beside the Solway Posts: 3969 |
You can easily bleed any replaced master cylinder without getting air into the abs block as follows.
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9th Aug 2024 3:47am |
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mgrover Member Since: 03 May 2020 Location: Leeds Posts: 394 |
the GAP tool makes bleeding a doddle.
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9th Aug 2024 1:19pm |
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