1972 Oldsmobile Cutlass Supreme Break Booster Problem? Unidentified sound?


Asked by Jan 06, 2014 at 02:03 PM about the 1972 Oldsmobile Cutlass Supreme

Question type: Maintenance & Repair

I was given a 1972 Oldsmobile Cutlass Supreme from a relative a few months ago and
up until a maybe a week ago i noticed a hissing sound coming from what it seems like
behind the dash on the left side of the steering wheel. Seems like its coming from the
break booster. Its not a hissing sound when i apply the breaks but a hissing sound
right from ignition and as i accelerate it also gets a bit louder. Anyone know what it
might be? The car is in great condition by the way, need to change the oil pan due to a
leak but in the meanwhile i'm keeping an eye on the level every few days. Thank You

2 Answers


From the description it sounds like the vacuum booster itself, the only real way to find it is to get a mechanics stethoscope and take out the metal probe unit and just use the hose and run along under the dash where the brake pedal rod goes through the firewall, if you hear a hiss right where the rod goes through then the booster is leaking, also check the booster check valve and main vacuum hose to the booster for any leaks.

Best Answer

And the good new is that if its the brake booster they are really easy to rebuild yourself. Buy a rebuild kit at the auto parts store and invest a sat afternoon and you're good to go. Having said that they rarely go so be sure to check all other vacuum lines in the area first like tennisshoes said.

Your Answer

Add photo

Related Questions

Search Oldsmobile Cutlass Supreme Questions

Oldsmobile Cutlass Supreme Experts

#1 munron
Reputation 540
#2 tennisshoes
Reputation 350
#3 Tom Demyan
Tom Demyan
Reputation 310
View All

Related Models For Sale

Used Chevrolet Monte Carlo"
13 Great Deals out of 2,069 listings starting at $2,000
Used Chevrolet Impala"
930 Great Deals out of 35,801 listings starting at $700
Used Buick Regal"
182 Great Deals out of 10,596 listings starting at $2,195
Used Chevrolet Caprice"
202 listings starting at $10,900
Used Ford Mustang"
721 Great Deals out of 41,404 listings starting at $900
Used Pontiac Grand Prix"
28 Great Deals out of 4,388 listings starting at $1,972
Used Chevrolet Camaro"
796 Great Deals out of 38,872 listings starting at $2,650
Used Chevrolet Corvette"
427 Great Deals out of 20,261 listings starting at $3,688
Used Dodge Challenger"
445 Great Deals out of 25,507 listings starting at $7,980
Used Dodge Charger"
646 Great Deals out of 30,065 listings starting at $1,995