Learned something today..but, a question

[Bill I.]

Reading the 67 TIM&JG and it speaks of a filter in the plastic part of the PB booster, where it exits to the hose that goes to the vac source. Question, can we buy just that part and does it need to be changed? How would one know if it needed changing? Thanks, Bill

[Clem Z.]

Re: Learned something today..but, a question

something else to learn is that in the winter here in the snow belt your power boost can stop working if the moisture from the snow on your boots get sucked in to that filter and freezes over night when the car sets out side you will have no power brake boost till the heater melts the ice. believe me that is a problem that took a lot of time to trouble shoot.

[Bill I.]

Re: Learned something today..but, a question

What??????

[Steven C.]

Re: Learned something today..but, a question

Bill, all the catalogs carry it. Paragon part #6786K.

[John H.]

Re: Learned something today..but, a question

Reading the 67 TIM&JG and it speaks of a filter in the plastic part of the PB booster, where it exits to the hose that goes to the vac source. Question, can we buy just that part and does it need to be changed? How would one know if it needed changing? Thanks, Bill

Bill -

That's a nomenclature error in the JG - the part in question isn't a "filter" at all - it's the vacuum check valve; midyears didn't use a vacuum filter - they came along in '68. I've already submitted a revision request for the next edition.

[Terry M.]

Re: Learned something today..but, a question

John,
There is a vacuum filter on 1978 and newer C3s, but it is not in the power brake vacuum system, at least not until the later 1970s -- maybe. It is plumbed into the vacuum system for the headlamps, wiper door (ISE), and HVAC system.

I seem to recall a vacuum filter, or perhaps a moisture trap, in the PB vacuum system on some Chevrolet models in the later 1970s, but I have to pleade ignorance if it was corvette or other GM model lines.

[Clem Z.]

Re: Learned something today..but, a question

What??????

there is a filter to let air in and out under the dash,that is a noise you hear when you work the brake pedal and it sucked in moisture and the filter would freeze up in the winter and not allow the air in and out of the back side of the booster diaphragm causing a very hard brake pedal. this was not on a corvette but on a van but i bet the corvette has the same system