Break Booster Question

KirkE · Post by **KirkE** » 18 May 2010, 19:46

I think I need new break booster?

There is a loud hissing noise coming from what looks like a small sleeve attached to the piston connecting the booster to the break pedal. The noise goes away during breaking, or acceleration.

Any tips?

Thanks
k

jda2000 · Post by **jda2000** » 19 May 2010, 09:17

You need a new brake booster. Common failure in these cars. Do it sooner than later, or you might loose the power braking when needed.

KEEman · Post by **KEEman** » 20 May 2010, 18:02

Is there a good manuel to reference? Can you get the booster out without opening the break system?

Post by **JDS60R** » 20 May 2010, 23:05

Here you go.

jda2000 · Post by **jda2000** » 21 May 2010, 07:32

I did this replacement a couple of months ago, here are a few tips:

-you don't need to disconnect the hydraulic lines from the ABS pump or master cylinder, just remove the 3 bolts that secure the abs pump to the bracket at the inner strut tower. The ABS pump/module can be gently pushed aside to remove the brake booster. It's a tight fit, but can be done.

-the ABS electrical connector is a bit tricky, is a sliding tab type, so takes a little wiggling to get it disconnected.

-you need to remove the hard air intake hose to the turbo, and while this hose is out clean the PCV valve at the end of it as preventive maintenance, is usually clogged up.

-don't buy a used or refurbished unit. A new unit for about $40 more, comes with a new brake pedal sensor, new master cylinder gasket and new brake booster vacuum valve. (save the sensor and valve from the old one). Get the new unit at FCP groton using the link above and get 10% off and free shipping.

-don't forget the master cylinder gasket when you put everything together, or you'll get a vac leak there.

Post back if you have problems.

dogs silver S60 · Post by **dogs silver S60** » 21 May 2010, 14:42

jda2000,

Great Post! Appreciate the info. I'm a fairly good "weekend mechanic". Is this do able by such a person ?

P.S. I'm not saying there won't be a few swear words uttered along the way.

Thanks again.

dogs silver S60

jda2000 · Post by **jda2000** » 21 May 2010, 18:19

dogs silver,

I am not a mechanic, just a regular guy trying to save money by doing myself.

I got good instructions here www.volvo-forums.com/t11884-brake-booster-replacement.htm

sixvolvos · Post by **sixvolvos** » 23 May 2010, 19:48

Would this advice and link to procedure apply to a '99 S70?

Thanks,
Sixvolvos

jda2000 · Post by **jda2000** » 24 May 2010, 07:07

Removing the brake booster in a '99 S70 should be about the same. You don't need to disconnect hydraulic brake lines.

Remember the battery is in the engine bay in the '99, not so on the P2 volvos,

KirkE · Post by **KirkE** » 25 May 2010, 20:36

Thanks for all the help. I'm ready to start this weekend.

I used this web site while back and successfully completed a front strut change. Saved me about $600.

Thanks Matthew's Volvo ... Great forum!!!!

k