is something wrong with this vac part?
Thread Starter
Safety Car
Joined: Mar 2002
Posts: 4,411
Likes: 1
From: Okeechobee Florida
is something wrong with this vac part?
1st of all...what is this part?
2ndly...i can hold onto the single hose side with one hand and the double hose side with my other hand and turn it so easily that i can almost spin it...this dosnt seam normal for a part that controls a vacumm...is it?
3rdly...i can block off any 2 holes and blow or suck thru the 3rd hole...is this normal?
thanx for any help :)
2ndly...i can hold onto the single hose side with one hand and the double hose side with my other hand and turn it so easily that i can almost spin it...this dosnt seam normal for a part that controls a vacumm...is it?
3rdly...i can block off any 2 holes and blow or suck thru the 3rd hole...is this normal?
thanx for any help :)
Le Mans Master
Joined: Jul 1999
Posts: 9,206
Likes: 17
From: Sewell NJ
Re: is something wrong with this vac part? (SIGNGUY)
Not sure, but I believe that's the check valve. It's supposed to allow vacuum in one direction only. You should also have a plastic filter. I think my engine pic will show you what I'm talking about. You can see that the filer goes on the hose right after it comes out of the manifold and then another hose connects the check valve.
[Modified by vettfixr, 7:20 PM 10/19/2002]
[Modified by vettfixr, 7:20 PM 10/19/2002]
Melting Slicks
Joined: Apr 1999
Posts: 2,521
Likes: 4
From: Windham, NH
Re: is something wrong with this vac part? (SIGNGUY)
This check valve is for the vacuum system. The part you have taped off connects to the intake manifold. You should be able to hold a vacuum by applying it to the side with the 2 ports on it, to BOTH of the ports, if not, it is bad. I have never seen one where you can "spin' the 2 pieces so I am assuming that yours is bad. New check valves are available from Ecklers & they call it a Vacuum Reserve Check Valve, Part #A2757 for #14.95 each. The "filter" vettefixer is refering to is Part #A2758 ( Ecklers says to call them for a price) & is called a "Aiir Check Valve Filter(white)" in the Ecklers catalog.
[Modified by Jim Martley2, 7:30 PM 10/19/2002]
[Modified by Jim Martley2, 7:30 PM 10/19/2002]
Melting Slicks
Joined: Apr 1999
Posts: 2,521
Likes: 4
From: Windham, NH
Re: is something wrong with this vac part? (SIGNGUY)
Your headlight doors would NOT go up or down without the car running and your heat, defrost & a/c outlets will be SLOW to react to changes and , under full throttle, sometimes will fade from one setting to another when the vacuum falls off.
Le Mans Master
Joined: Jul 1999
Posts: 9,206
Likes: 17
From: Sewell NJ
Re: is something wrong with this vac part? (SIGNGUY)
The plastic part is a filter and is used on 68-82s. Doc Rebuild has the filter for $5 (part no. 2771112) and the check valve goes for $17.75 (part no. 2771113). A faulty check valve could cause your head lamps or wiper door to pop open when the engine is shut off.
