Hydraulic Woes

[Brian Pleet]

My wife's 90 90q20v is back on the road after a cylinder head rebuild 
and timing belt change.

One last issue is the brake indicator light.

Symptoms:
1) brake warning indicator stays on for 25-30 sec on starting, 10 
secs if running engine at 2000 RPM
2) brake warning indicator lights momentarily on full L and R turn, 
after pumping the brakes 10-15 times at idle, not at 2000RPM
3) whining sound when cold from 800-1200 RPM, not related to turning 
the steering wheel. Loosening the pump belt helped, but its still noticeable.
4) starting engine with foot on brake pedal does not change the pedal 
feel and pumping after turning off the engine does not seem to 
benefit from any boost
5) when the return line on the hydraulic brake servo is removed, more 
than a "few drops" of fluid run out
6) brake pressure accumulator is original (unless the dealer replaced 
it in the first 10 years)
7) hydraulic fluid was Pentosin, but the dealer suggested 10 years 
ago that adding Lucas would stop the whining while turning
9) front brake rotors and pads were just replaced and brake fluid was flushed
10)Hydraulic lines all show some minor seepage at joints (likely just 
18 years of use) but no obvious leaks and reservoir stays full


I've just bought a new(er) accumulator and Pentosin for a flush. Are 
there other parts (pump, servo, etc) I should replace at the same time?



Brian
90 90Q 20v
95.5 S6
02 TT Roadster




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E-mail:bpleet at telusplanet.net
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