Vacuum filter direction?
Thread Starter
Burning Brakes
Joined: Aug 2008
Posts: 845
Likes: 12
From: LAKE BARRINGTON IL
Vacuum filter direction?
Hi all!
needed to replace the white vacuum check filter that comes directly off the carburetor and goes to the vacuum lights on a 1969.
What direction does it need to face-meaning what flow of vacuum do u want open and closed?
so which way do we want to PREVENT flow...back towards the engine?
thanks!
needed to replace the white vacuum check filter that comes directly off the carburetor and goes to the vacuum lights on a 1969.
What direction does it need to face-meaning what flow of vacuum do u want open and closed?
so which way do we want to PREVENT flow...back towards the engine?
thanks!
Race Director
Joined: Apr 2011
Posts: 11,183
Likes: 3,334
From: North of Toronto - Ontario
Engine pulls vacuum so it has to allow flow TO the engine
M
BTW, the check valve is the 3 pipe one (single to the engine) and the filter is the white plastic one, doesn't matter the direction IIRC
M
M
BTW, the check valve is the 3 pipe one (single to the engine) and the filter is the white plastic one, doesn't matter the direction IIRC
M
Last edited by Mooser; Feb 28, 2019 at 04:56 PM.
Thread Starter
Burning Brakes
Joined: Aug 2008
Posts: 845
Likes: 12
From: LAKE BARRINGTON IL
Hey Moosser!!! Thanks as always!
lit is the Plastic piece. So allow flow TO the engine. Stopping from going away from engine. (One way open TO engine). I believe I got it.
BTW. If we are not being purists. I found a black DORMAn. #47170. $5. Not original look. But the black looks better.
lit is the Plastic piece. So allow flow TO the engine. Stopping from going away from engine. (One way open TO engine). I believe I got it.
BTW. If we are not being purists. I found a black DORMAn. #47170. $5. Not original look. But the black looks better.
Race Director
Joined: Feb 2001
Posts: 11,144
Likes: 1,985
From: Grapevine Tx
2018 C3 of Year Finalist
2016 C3 of the Year Finalist
Hey Moosser!!! Thanks as always!
lit is the Plastic piece. So allow flow TO the engine. Stopping from going away from engine. (One way open TO engine). I believe I got it.
BTW. If we are not being purists. I found a black DORMAn. #47170. $5. Not original look. But the black looks better.
lit is the Plastic piece. So allow flow TO the engine. Stopping from going away from engine. (One way open TO engine). I believe I got it.
BTW. If we are not being purists. I found a black DORMAn. #47170. $5. Not original look. But the black looks better.
Race Director
Joined: Apr 2011
Posts: 11,183
Likes: 3,334
From: North of Toronto - Ontario
Just so we're all on the same page
Check valve on the left, single tube to the engine, (on the other side, one tube to the reservoir and the other to the headlight switch)
Filter on the right, doesn't have a direction, works either way
M
Check valve on the left, single tube to the engine, (on the other side, one tube to the reservoir and the other to the headlight switch)
Filter on the right, doesn't have a direction, works either way
M
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Thread Starter
Burning Brakes
Joined: Aug 2008
Posts: 845
Likes: 12
From: LAKE BARRINGTON IL
A filter? So what does it do then...? (Besides acts as a. Filter).
mine broke open. So I have 2 pieces. No clue if there is something inside. All I get when I go WOT is 2 pieces~ it just pops apart. If there was something in there. It isn’t anymore.
mine broke open. So I have 2 pieces. No clue if there is something inside. All I get when I go WOT is 2 pieces~ it just pops apart. If there was something in there. It isn’t anymore.
Race Director
Joined: Apr 2011
Posts: 11,183
Likes: 3,334
From: North of Toronto - Ontario
The filter is just there so no debris (rust, etc) from the rest of the system (headlight actuators, valves, tank, etc), doesn't get sucked into the engine, those vac ports lead to the combustion chambers.
The engine is always pulling vacuum (what it can anyway) and the reservoir just give it enough volume (or lack of volume...) to activate the headlights etc otherwise they would be really slow as the engine tried to draw all that "air" out of the actuators a little at a time. Same like the brake booster reservoir, needs a bunch of volume at once
M
The engine is always pulling vacuum (what it can anyway) and the reservoir just give it enough volume (or lack of volume...) to activate the headlights etc otherwise they would be really slow as the engine tried to draw all that "air" out of the actuators a little at a time. Same like the brake booster reservoir, needs a bunch of volume at once
M
Thread Starter
Burning Brakes
Joined: Aug 2008
Posts: 845
Likes: 12
From: LAKE BARRINGTON IL
Thanks! Yeah I have barely any vacuum w the big cam.
Bc I don’t produce any vacuum. For brake booster, I installed a bandit vacuuum pump. Works like a dream.
So so it is just a filter. Thanks!
Bc I don’t produce any vacuum. For brake booster, I installed a bandit vacuuum pump. Works like a dream.
So so it is just a filter. Thanks!
