Pelican Parts
Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   Pelican Parts Forums > Porsche Forums > Porsche 924/944/968 Technical Forum


Reply
 
LinkBack Thread Tools Rate Thread
Author
Thread Post New Thread    Reply
Registered User
 
ds475's Avatar
 
Join Date: Aug 2003
Location: Austin, Texas
Posts: 717
Send a message via AIM to ds475
Braking hard - front right slip

when braking hard, whether it be wet/dry conditions or on a loose gravel patch on the road, my front right always slips and i don't think i've ever had my other 3 slip but a few times before. always the lone front right is a slippin.

why is this? my friend said his old pos nissan truck used to do that.

__________________
'82 928S
'85.0 944 Not Awesome - Being Parted Out
Old 12-09-2003, 11:05 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #1 (permalink)
Registered User
 
SoCal Driver's Avatar
 
Join Date: Feb 2002
Location: Costa Mesa
Posts: 8,587
Garage
You mean the wheel locks up. What shape are the rotors in? Really worn? Or one has been replaced recently?

How thick are the pads? Do both right and left wheels have the same wear on their pads?
__________________
Hugh - So Cal 83 944 Driver Person
NOT a 'real' Porsche -- Its Better!!!!
When was the last time you changed your timing and balance belts and/or cam chain and tensioner?
New Users please add your car's year and model to your signature line!
Never break more than you fix!
Old 12-09-2003, 11:36 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #2 (permalink)
Registered User
 
speedy007's Avatar
 
Join Date: Nov 2002
Location: $unny Calif
Posts: 252
Garage
might even be susspension related
__________________
88 944 bastard
Old 12-10-2003, 05:55 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #3 (permalink)
Let's go shooting.
 
Dark Skies's Avatar
 
Join Date: Feb 2003
Location: United Kingdom.
Posts: 1,200
I had the exact same trouble regularly occur with my race car. Every 3,000 miles or so the right front would lock and pull. Made no difference wet or shine. I looked for all the usual suspects, faulty caliper, corrosion, weeping seals, glazing, dodgy discs, air in the line / system. The only cure was to get a new set of brake pads for both fronts. Dressing the old pads (no sign of glazing or oil contamination) just wouldn't fix it. Totally bizarre.

Try all the above - it might be the answer to your problems. If you suspect the pads after checking the usual stuff - try swapping them over to the opposite sides temporarily to see if the pull still exists. If it does (assuming rotors / calipers / seals / air bled properly etc. etc. isn't the problem) it may well be that, as Speedy suggests, the suspension is at fault. My guess would be control arm bushings / loose bolts causing the load on braking to be disproportionally placed onto that corner. Loose fittings here allow the wheel to 'turn' that little bit extra due to the extra movement available to it - hence the pull to that side. Could be a weak spring / faulty damper too - causing her to 'kneel down' harder on that side. I've had this happen too so it's not as remote as it might sound.
__________________
1983 944 Lux (manual) 2.5 litre 8 valve na and no pas

1991 944 (automatic) 2.7 litre 16 valve na and pas

"I have only five words for you: From my cold, dead hands."

Last edited by Dark Skies; 12-10-2003 at 06:54 AM..
Old 12-10-2003, 06:42 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #4 (permalink)
Let's go shooting.
 
Dark Skies's Avatar
 
Join Date: Feb 2003
Location: United Kingdom.
Posts: 1,200
Oh, and it could be that the right isn't locking up but, rather, the left isn't pulling it's weight - try bleeding the system / examining seals etc etc. on the left brake too before spending any money.
__________________
1983 944 Lux (manual) 2.5 litre 8 valve na and no pas

1991 944 (automatic) 2.7 litre 16 valve na and pas

"I have only five words for you: From my cold, dead hands."
Old 12-10-2003, 06:46 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #5 (permalink)
Moderator
 
Z-man's Avatar
 
Join Date: Feb 2001
Location: NJ, USA
Posts: 8,560
Garage
Quote:
Originally posted by Dark Skies
Oh, and it could be that the right isn't locking up but, rather, the left isn't pulling it's weight - try bleeding the system / examining seals etc etc. on the left brake too before spending any money.
I agree with Dark: the problem could very well be on the left side: so if you don't see anything wrong on the right after careful inspection, turn your attention to the left side.

Definately bleed the brakes.

If all looks fine, your brake bias valve may be clogged or defective.

HTH,
-Z.
__________________
1989 944S2 - June, 2001 - January, 2014

Visit my homepage!
<><
Old 12-10-2003, 08:55 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #6 (permalink)
Registered User
 
speedy007's Avatar
 
Join Date: Nov 2002
Location: $unny Calif
Posts: 252
Garage
the bias valve only reduces pressure to the rear brakes. has nothing to do with the front brakes.
__________________
88 944 bastard
Old 12-10-2003, 05:14 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #7 (permalink)
Moderator
 
Z-man's Avatar
 
Join Date: Feb 2001
Location: NJ, USA
Posts: 8,560
Garage
Quote:
Originally posted by speedy007
the bias valve only reduces pressure to the rear brakes. has nothing to do with the front brakes.
Under optimal conditions, this is true. BUT: a defective bias valve can yield unpredictable results.

Also: it may feel that the front of the car is slipping, but the problem could be in the back nonetheless.

Oh, and I'm just going on a hunch about the bias valve.....

-Z.

__________________
1989 944S2 - June, 2001 - January, 2014

Visit my homepage!
<><
Old 12-11-2003, 06:50 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #8 (permalink)
Reply

Thread Tools
Rate This Thread
Rate This Thread:

 


All times are GMT -8. The time now is 01:17 AM.


 
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2020 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page
 

DTO Garage Plus vBulletin Plugins by Drive Thru Online, Inc.