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Braking during a hard rain #4676908
02/24/18 07:50 PM
02/24/18 07:50 PM
Joined: Aug 2010
Posts: 5,932
Champlain/Hudson Valley
Kira Online content OP
Kira  Online Content OP
Joined: Aug 2010
Posts: 5,932
Champlain/Hudson Valley
No big deal here, just a first time observation.

'Twas a rainy drive south on the Interstate yesterday. Lots of rain, spray, splashing, fog, condensation....everything wet.
I'd touch the brakes when necessary and feel nothing. Leaning on 'em a bit caused a minor, somehow exaggerated vibration and finally a predictably even braking effect.

The first time was near alarming. I could see a mechanically disinclined person panicing.
How "well lubed" the brake hardware STAYED at less-than-strong pressures was surprising.

The few times I tested it for real involved peddle pressure far in excess of "surprised stopping" and 10 car lengths were needed to BEGIN stopping the car.
Anybody ever experience that?

Just for giggles, I'm going to inspect my 15,000 mile old front and 46,000 mile old rear brakes.

ps Today (dry day) the brakes feel just fine. No hint of pulsing / vibration.

Re: Braking during a hard rain [Re: Kira] #4676913
02/24/18 07:54 PM
02/24/18 07:54 PM
Joined: Aug 2003
Posts: 13,137
NE,Ohio
Rand Offline
Rand  Offline
Joined: Aug 2003
Posts: 13,137
NE,Ohio
probably just water soaked.
If you drive in heavy rain and dont touch the brakes for awhile.
takes a second or 2 to dry up and work better.

Also what brake pads were installed?


2019 Jeep Cherokee Trailhawk 2.0T
Re: Braking during a hard rain [Re: Rand] #4676922
02/24/18 07:59 PM
02/24/18 07:59 PM
Joined: Aug 2010
Posts: 5,932
Champlain/Hudson Valley
Kira Online content OP
Kira  Online Content OP
Joined: Aug 2010
Posts: 5,932
Champlain/Hudson Valley
I have no idea what brand hardware was used.
Being the car was serviced at a Volvo dealership, I'd ASSUME they used Volvo parts.

The vehicle is a 2007 V70 NA...my pride and joy...my third V70.
Hunted so long I bought at a dealership.

Re: Braking during a hard rain [Re: Kira] #4676952
02/24/18 08:39 PM
02/24/18 08:39 PM
Joined: Nov 2009
Posts: 5,121
Houston, Texas
motor_oil_madman Online content
motor_oil_madman  Online Content
Joined: Nov 2009
Posts: 5,121
Houston, Texas
Happens on my truck too. Totally normal.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: Braking during a hard rain [Re: Kira] #4676953
02/24/18 08:39 PM
02/24/18 08:39 PM
Joined: Mar 2017
Posts: 6,475
...
PimTac Offline
PimTac  Offline
Joined: Mar 2017
Posts: 6,475
...
Very common. Drive through a deep puddle or standing water and touch your brakes to evaporate the water off by heat. If it’s the first rain in a long time then add road oil to the mix


Cannot see signatures any longer so it doesn’t matter.
Re: Braking during a hard rain [Re: Kira] #4676954
02/24/18 08:40 PM
02/24/18 08:40 PM
Joined: Apr 2012
Posts: 5,571
MA
Wolf359 Offline
Wolf359  Offline
Joined: Apr 2012
Posts: 5,571
MA
Next time I'm driving in the rain, I'll have to check. Mine has a brake drying feature, it applies the brakes slightly to keep the rotors dry when the wipers are in use. A quick search shows that Mercedes, BMW, Audi, VW, and Cadillac are some of the manufacturers that have it.

Re: Braking during a hard rain [Re: Wolf359] #4676964
02/24/18 08:51 PM
02/24/18 08:51 PM
Joined: Jun 2014
Posts: 2,002
IL
Vern_in_IL Offline
Vern_in_IL  Offline
Joined: Jun 2014
Posts: 2,002
IL
Originally Posted By: Wolf359
Next time I'm driving in the rain, I'll have to check. Mine has a brake drying feature, it applies the brakes slightly to keep the rotors dry when the wipers are in use. A quick search shows that Mercedes, BMW, Audi, VW, and Cadillac are some of the manufacturers that have it.


Wow, did not know this, thanks!

Re: Braking during a hard rain [Re: Vern_in_IL] #4676977
02/24/18 09:00 PM
02/24/18 09:00 PM
Joined: Aug 2010
Posts: 5,932
Champlain/Hudson Valley
Kira Online content OP
Kira  Online Content OP
Joined: Aug 2010
Posts: 5,932
Champlain/Hudson Valley
I think I heard of such "brake drying" feature before.

I suppose the feature has its place. I hope it doesn't eat brakes

Re: Braking during a hard rain [Re: Wolf359] #4676987
02/24/18 09:10 PM
02/24/18 09:10 PM
Joined: Mar 2017
Posts: 6,475
...
PimTac Offline
PimTac  Offline
Joined: Mar 2017
Posts: 6,475
...
Originally Posted By: Wolf359
Next time I'm driving in the rain, I'll have to check. Mine has a brake drying feature, it applies the brakes slightly to keep the rotors dry when the wipers are in use. A quick search shows that Mercedes, BMW, Audi, VW, and Cadillac are some of the manufacturers that have it.



I like the old saying, “Trust but Verify.”


Cannot see signatures any longer so it doesn’t matter.
Re: Braking during a hard rain [Re: Kira] #4676994
02/24/18 09:16 PM
02/24/18 09:16 PM
Joined: Apr 2012
Posts: 5,571
MA
Wolf359 Offline
Wolf359  Offline
Joined: Apr 2012
Posts: 5,571
MA
Originally Posted By: Kira
I think I heard of such "brake drying" feature before.

I suppose the feature has its place. I hope it doesn't eat brakes


It's mentioned in this brochure.

http://www.auto-brochures.com/makes/Mercedes_Benz/E-Class/Mercedes%20Benz_US%20E-Class_2008.pdf

Doesn't seem to eat them. I did the brakes about a year ago after having it for 2 years. It still had over half the pad left. It had new pads when I got it. I just got sick and tired of the brake dust and I put in Akebono pads instead. No dust now.

Re: Braking during a hard rain [Re: Kira] #4677001
02/24/18 09:20 PM
02/24/18 09:20 PM
Joined: Dec 2006
Posts: 8,006
Canuck living in California
KrisZ Online content
KrisZ  Online Content
Joined: Dec 2006
Posts: 8,006
Canuck living in California
I have experienced this as well in heavy rain, totally normal. Yes it can feel scary at first because the delay makes it feel like you have no brakes.


2015 Dodge Grand Caravan-27k miles.
2006 Mazda 3-163k miles
Re: Braking during a hard rain [Re: Wolf359] #4677033
02/24/18 09:39 PM
02/24/18 09:39 PM
Joined: Dec 2016
Posts: 7,109
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 7,109
Waco, TX
Originally Posted By: Wolf359

I just got sick and tired of the brake dust ... No dust now.


You now have ceramic brake pads.
Yes, dust is gone - - but I HATE HATE HATE how "low friction" they are.

Ceramic brake pads last forever, but can be really hard on rotors.

Carbon Metallic brake pads have been my favorites.
I'm not a fan of the new ceramic brake pads at all.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Braking during a hard rain [Re: Rand] #4677036
02/24/18 09:40 PM
02/24/18 09:40 PM
Joined: Mar 2015
Posts: 5,393
Virginia
bbhero Offline
bbhero  Offline
Joined: Mar 2015
Posts: 5,393
Virginia
Great answer by Rand.

I drove through rather deep water in Mathews county. Above the top of tire... Was going 50 mph and heading towards a rather sharp curve. Thank goodness I stated to brake early.... Took awhile for the brakes to get to working. I managed to get slowed down in time. Barely. Learned a good lesson that afternoon.


Nissan Altima 3.5 Coupe
Mobil Super 5w30 Wix 57356
"Treat your family like your friends and treat your friends like your family."
Re: Braking during a hard rain [Re: Wolf359] #4677042
02/24/18 09:46 PM
02/24/18 09:46 PM
Joined: Mar 2015
Posts: 5,393
Virginia
bbhero Offline
bbhero  Offline
Joined: Mar 2015
Posts: 5,393
Virginia
Wolf359 is big, big money. Only cool cats with cash can have a feature that on their vehicles LOL


Just messing with you Wolf. Hope you've had a good day today.


Nissan Altima 3.5 Coupe
Mobil Super 5w30 Wix 57356
"Treat your family like your friends and treat your friends like your family."
Re: Braking during a hard rain [Re: Kira] #4677071
02/24/18 10:11 PM
02/24/18 10:11 PM
Joined: Jul 2002
Posts: 4,543
KY
MCompact Offline
MCompact  Offline
Joined: Jul 2002
Posts: 4,543
KY
Originally Posted By: Kira
I think I heard of such "brake drying" feature before.

I suppose the feature has its place. I hope it doesn't eat brakes


My 2 Series has brake drying; I'm currently at 39k miles- including three HPDE days and one night at the local drag strip. Still on the original pads and based on the Condition Based Service calculation I probably won't need new pads for at least another 10k miles.


Mine:
2014 M235i
2009 Cooper Clubman
1999 Wrangler Sahara
1995 318ti Club Sport

Wife's:
2015 X1 xDrive28i


Son's
2009 328i

Buy what makes you smile...
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