Vacuum Line Question

[Hill1430]

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?

[Steve Wood]

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.

[~JM~]

Maybe this?

https://www.autozone.com/fittings-and-hose-line-connectors/vacuum-connector-and-tubing/p/dorman-autograde-soft-vacuum-tubing-connector-assortment-6-piece/426019_0_0

[Hill1430]

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 1/8”.

[Steve Wood]

I'm not aware of a check valve on intercooled cars on that side.  Map sensor is the only thing in over there

I am confused, I think, but this is the only check valve for the brake booster    d=brake+booster+check+valve&fromString=search&isIgnoreVehicl e=false&searchText=brake+booster+check+valve" class="bbc_link" target="_blank" rel="noopener noreferrer">https://www.autozone.com/brakes-and-traction-control/power-brake-booster-check-valve?filterByKeyWor d=brake+booster+check+valve&fromString=search&isIgnoreVehicl e=false&searchText=brake+booster+check+valve

[xracerx13]

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

[~JM~]

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 1/8”.

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

[Steve Wood]

Guess some cars had one. https://shop.advanceautoparts.com/p/dorman-help-power-brake-filter-80195/5707706-P

[Hill1430]

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.

[nocooler]

https://smile.amazon.com/EVIL-ENERGY-Return-Petrol-Aluminium/dp/B08JJ1F79D/ref=sr_1_3?keywords=3%2F8+check+valve&qid=1663898279&sprefix=3%2F8+check%2Caps%2C167&sr=8-3 - check valve. Probably a 3/8 but they have them larger

[Hill1430]

Thanks, that’s what I’m looking for.

[~JM~]

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.

[Hill1430]

That’s what I have figured out.