CarForum.net - Car Forums, Automotive News and Community
Home Gallery Register Calendar Members List

Go Back   CarForum.net - Car Forums, Automotive News and Community > Car Parts and Maintenance > Other Car Parts and Components

Reply
LinkBack Thread Tools
Unread 03-18-2011, 06:14 PM   #1
Senior Member
 
Join Date: Oct 2008
Location: Maine
Posts: 213
Rep: 12 Nategr8ns is on a distinguished road
Default Brake performance while wet.

How are brakes supposed to perform while wet? For reference, I've got front discs and rear drums.
When I end up going through a deep puddle or playing in a snowstorm, I lose a lot of feel in the pedal and can't get the pads to grip the rotors/drums very well, even when pushing the pedal to the floor.
I just want to know if this is normal...

I may need to replace the rear wheel cylinders too. Not sure, but in about two months I lost a bit of brake fluid (reservoir went from "MAX" line to half-way between MIN and MAX.
__________________
Me:
1999 Subaru Impreza Outback. 1998 Subaru Impreza RS wheels, Hella FF1000 driving lights, Crown Royal shift boot .

Nategr8ns is offline  
Reply With Quote
Unread 03-18-2011, 06:59 PM   #2
Veteran Member
 
Mr Car Guy's Avatar
 
Join Date: Mar 2008
Location: Surrey, BC, Canada
Posts: 2,052
Rep: 186 Mr Car Guy has a spectacular aura aboutMr Car Guy has a spectacular aura about
Default

If you are talking about how should the brakes feel after submerging them, they will feel real poor! Drum brakes can take several minutes to drain and dry out. Disc brakes dry out faster.

If you are talking about just a rainy day on the street, your brakes should feel about normal because the rim shields most of the rain away. If it's pouring, or you have driven quite a while with no brake application in heavy rain the brakes may take several seconds to dry out and respond as expected.
__________________
2003 GMC Envoy 5.3

Mr Car Guy is offline Mr Car Guy's Gallery  
Reply With Quote
Unread 03-18-2011, 10:04 PM   #3
Spah sappin' mah susp!
 
Kenny McCormick's Avatar
 
Join Date: Jan 2009
Location: Earth...I think
Posts: 3,271
Rep: 96 Kenny McCormick will become famous soon enough
Default

Deep puddles and snow will get water on the rotors and drums themselves. This will cause your brakes to be absolute rubbish.


If you suspect they're wet ride them. The heat generated will boil the water off, and when you feel them start working normally again let off the pedal.
__________________
Tired Iron ain't got no time to wear out...

My rigs:

1985 Ford F150 | 4x2 | 300ci OHV inline six | 4-speed OD manual | 310K | No power brakes | Running 100% - It hasn't driven this good in 15 years!

1984 Ford F150 | 4x2 | 300ci six | granny four | 3.55 rear end | 210K | Brakes shot. Rear drums are doing most of the work. Not fit to drive due to that.
1997 Ford Explorer XLT | 4.0L Vulcan V6 | 5-speed automatic | shift-on-the-fly 4WD | 210,000 miles | Running 95% - Needs brakes on all four corners + bald tires
1989 Ford F150 | 300cid six...again | 5-speed | 4x4 | 160K | Needs brakes done as well. Oi!

Kenny McCormick is offline  
Reply With Quote
Unread 03-18-2011, 10:50 PM   #4
Senior Member
 
Join Date: Oct 2008
Location: Maine
Posts: 213
Rep: 12 Nategr8ns is on a distinguished road
Default

Thanks guys. Some local car enthusiasts are getting on my case about not having safe brakes due to the wet-performance, but I was pretty sure it was normal.

Now the disappearing brake fluid thing... Is that slow enough to be considered normal, or is any missing brake fluid bad, ever?
__________________
Me:
1999 Subaru Impreza Outback. 1998 Subaru Impreza RS wheels, Hella FF1000 driving lights, Crown Royal shift boot .

Nategr8ns is offline  
Reply With Quote
Unread 03-18-2011, 10:59 PM   #5
It's Simple
 
Raptor22's Avatar
 
Join Date: Mar 2010
Location: Chico, California
Posts: 2,555
Rep: 64 Raptor22 will become famous soon enough
Default

Quote:
Originally Posted by Nategr8ns View Post
Thanks guys. Some local car enthusiasts are getting on my case about not having safe brakes due to the wet-performance, but I was pretty sure it was normal.

Now the disappearing brake fluid thing... Is that slow enough to be considered normal, or is any missing brake fluid bad, ever?
As your brake pads/shoes wear down, the normal position of the backing plates will be closer to the disc/drum causing the fluid level in the master cylinder to drop normally. When you compress your pistons it will push the fluid back into the master cylinder.
__________________
Its an MN-12 thing... you wouldnt understand.
Quote:
Originally Posted by Colin McRae
"Straight roads are for fast cars, turns are for fast drivers."
[1989 Ford Blunderbird / 1985 Ford Conestoga Ox-Cart 4x4 / 2004 Ford Fairmont GT]

Raptor22 is offline Raptor22's Gallery  
Reply With Quote
Unread 03-18-2011, 11:57 PM   #6
Spah sappin' mah susp!
 
Kenny McCormick's Avatar
 
Join Date: Jan 2009
Location: Earth...I think
Posts: 3,271
Rep: 96 Kenny McCormick will become famous soon enough
Default

Half the chamber over 12 months?


That's definitely a leak.
__________________
Tired Iron ain't got no time to wear out...

My rigs:

1985 Ford F150 | 4x2 | 300ci OHV inline six | 4-speed OD manual | 310K | No power brakes | Running 100% - It hasn't driven this good in 15 years!

1984 Ford F150 | 4x2 | 300ci six | granny four | 3.55 rear end | 210K | Brakes shot. Rear drums are doing most of the work. Not fit to drive due to that.
1997 Ford Explorer XLT | 4.0L Vulcan V6 | 5-speed automatic | shift-on-the-fly 4WD | 210,000 miles | Running 95% - Needs brakes on all four corners + bald tires
1989 Ford F150 | 300cid six...again | 5-speed | 4x4 | 160K | Needs brakes done as well. Oi!

Kenny McCormick is offline  
Reply With Quote
Unread 03-19-2011, 02:44 AM   #7
Veteran Member
 
Join Date: Sep 2009
Posts: 553
Rep: 18 Felipe the Ant is on a distinguished road
Default

puddles don't do any favors for your wheel bearings either

Felipe the Ant is offline  
Reply With Quote
Unread 03-19-2011, 02:04 PM   #8
Senior Member
 
Join Date: Oct 2008
Location: Maine
Posts: 213
Rep: 12 Nategr8ns is on a distinguished road
Default

Quote:
Originally Posted by Raptor22 View Post
As your brake pads/shoes wear down, the normal position of the backing plates will be closer to the disc/drum causing the fluid level in the master cylinder to drop normally. When you compress your pistons it will push the fluid back into the master cylinder.
I'll have a friend push the pedal while I watch the reservoir.

Quote:
Originally Posted by Kenny McCormick View Post
Half the chamber over 12 months?


That's definitely a leak.
So you don't think this is due to the pad/shoe wear?
__________________
Me:
1999 Subaru Impreza Outback. 1998 Subaru Impreza RS wheels, Hella FF1000 driving lights, Crown Royal shift boot .

Nategr8ns is offline  
Reply With Quote
Unread 03-19-2011, 02:16 PM   #9
Spah sappin' mah susp!
 
Kenny McCormick's Avatar
 
Join Date: Jan 2009
Location: Earth...I think
Posts: 3,271
Rep: 96 Kenny McCormick will become famous soon enough
Default

Quote:
Originally Posted by Felipe the Ant View Post
puddles don't do any favors for your wheel bearings either
If puddles worry your wheel bearings you need to replace the seals. They should be impervious to wet roads.

Quote:
Originally Posted by Nategr8ns View Post
So you don't think this is due to the pad/shoe wear?
No. Some fluid drop is, but that's far too much far too fast to account for pad wear. Most likely it's the rear cylinders, those things love to leak.
__________________
Tired Iron ain't got no time to wear out...

My rigs:

1985 Ford F150 | 4x2 | 300ci OHV inline six | 4-speed OD manual | 310K | No power brakes | Running 100% - It hasn't driven this good in 15 years!

1984 Ford F150 | 4x2 | 300ci six | granny four | 3.55 rear end | 210K | Brakes shot. Rear drums are doing most of the work. Not fit to drive due to that.
1997 Ford Explorer XLT | 4.0L Vulcan V6 | 5-speed automatic | shift-on-the-fly 4WD | 210,000 miles | Running 95% - Needs brakes on all four corners + bald tires
1989 Ford F150 | 300cid six...again | 5-speed | 4x4 | 160K | Needs brakes done as well. Oi!

Kenny McCormick is offline  
Reply With Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 04:59 PM.

Shogun Interactive Development Copyright 2015 Shogun Interactive Development. All rights reserved.