Author Topic: Vacuum Line Question  (Read 378 times)

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Offline Hill1430

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Vacuum Line Question
« on: September 21 2022, 09:39:00 PM »
Anyone have a suggestion on how to fix this?
Also suggestion on where to find a vacuum check valve for the larger vacuum line to the brake booster on a vacuum brake conversion?
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Offline Steve Wood

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Re: Vacuum Line Question
« Reply #1 on: September 21 2022, 10:00:32 PM »
The check valve is a pretty common item and I have bought them at the parts store.  I assume you are talking about the one that plugs into the booster?  that is the only one in the line from the intake to the booster.

I am not sure what the picture is but my best guess is that it is the vacuum fitting to the heater control valve on the small hard plastic hose, and/or the one that goes on the other end at the firewall?  I have never seen one for sale, but I have taken a short piece of vacuum hose, put rtv or some other form of "glue" on the end of the  plastic line, and then slipped the vacuum hose over it...then a small zip tie around it seals the deal.
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Offline Hill1430

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Re: Vacuum Line Question
« Reply #3 on: September 21 2022, 11:13:40 PM »
That actually goes to the passenger side fender. I will try the Autozone kit. All the parts stores I have tried do not have a check valve bigger than 1/8Ē.
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Offline Steve Wood

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« Last Edit: September 21 2022, 11:36:28 PM by Steve Wood »
Steve Wood

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Re: Vacuum Line Question
« Reply #5 on: September 22 2022, 10:42:14 AM »
Digital dash cars have that hose connection on a hobbs style pressure switch on the inner passenger fender. Its for the turbo power lights on the dashboard. The useless Yellow/Orange lights I have not looked at in 30 years at least
« Last Edit: September 22 2022, 11:00:18 AM by xracerx13 »

Offline ~JM~

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Re: Vacuum Line Question
« Reply #6 on: September 22 2022, 12:42:18 PM »
That actually goes to the passenger side fender. I will try the Autozone kit. All the parts stores I have tried do not have a check valve bigger than 1/8Ē.

Check the replacement frequently. They don't last near as well as the OEM part.

Offline Steve Wood

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Re: Vacuum Line Question
« Reply #7 on: September 22 2022, 06:58:11 PM »
Steve Wood

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Offline Hill1430

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Re: Vacuum Line Question
« Reply #8 on: September 22 2022, 09:41:22 PM »
Ok, sorry for the confusion. The original picture is the rubber connector from the hard plastic line to the MAP sensor. It is cracked and I want to replace it somehow.
The second question, I converted to vacuum brakes. I have seen pictures of some cars that have a check valve in the larger diameter vacuum hose from the plenum to the brake booster. I am having a problem finding a check valve for a larger diameter hose. Do I even need one there? Below is a picture.
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Offline Hill1430

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Re: Vacuum Line Question
« Reply #10 on: September 23 2022, 10:24:03 AM »
Thanks, thatís what Iím looking for.
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Offline ~JM~

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Re: Vacuum Line Question
« Reply #11 on: September 23 2022, 07:27:53 PM »
I have vacuum assist master cylinder from a Monte Carlo. The check valve was included. It is where the vacuum hose connects at the master.

Offline Hill1430

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Re: Vacuum Line Question
« Reply #12 on: September 24 2022, 09:56:24 PM »
Thatís what I have figured out.
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