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Check that Brake Booster Hose!


99vetteman

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On my 3.4 DOHC, when I had it apart yesterday to do all its major service, I noticed that the end of the hose going into the plenum was so badly soft like a sponge, its a wonder I get any braking at all. I guess its from the excess heat over the years. Change that hose and your brakes will no doubt work a little better!

 

Jason

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On my 3.4 DOHC, when I had it apart yesterday to do all its major service, I noticed that the end of the hose going into the plenum was so badly soft like a sponge, its a wonder I get any braking at all. I guess its from the excess heat over the years. Change that hose and your brakes will no doubt work a little better!

 

Jason

 

That's one of the things I do whenever I purchase a new/used car before I start doin' anything else.

 

I also check the booster to make sure it's not filling with brake fluid from a bad master cylinder.

 

--Dave.

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DaveFromColorado, how do you check for the bad master?

 

But the 3.4 has always had that as a common thing, since it is tucked under the plenum.

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I usually use the oil dip stick gently pushed into the booster - you can see if there's brake fluid on it - if there is, you need a new master cylinder, or at least to inspect it.

 

--Dave.

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