Vacuum Hell on 76 L-48
Thread Starter
Burning Brakes
Joined: Apr 1999
Posts: 905
Likes: 0
Vacuum Hell on 76 L-48
Have been cleaning in the engine compartment and finally really noticed how jumbled my vacuum lines seem to be. I also found a "vacuum hose?" coming out of the carb passenger side that has a screw plugging it up ( #1 in picture ). Any idea what this is or where / what it should be plugged in to? Also in #2, this is one heck of a rats nest of vacuum hoses. Is this where they normally are - kind of hanging all over the engine?
If you can help me clean up this mess, I would be very thankful. Everything seems to be working OK but the clutter is driving me crazy. The pictures are a bit large for detail so please just follow the links.
http://www.corvetteforum.net/classic...2/P9040004.jpg http://www.corvetteforum.net/classic...2/P9040003.jpg http://www.corvetteforum.net/classic...2/P9040001.jpg
STW :seeya
Robert
76Stinger
If you can help me clean up this mess, I would be very thankful. Everything seems to be working OK but the clutter is driving me crazy. The pictures are a bit large for detail so please just follow the links.
http://www.corvetteforum.net/classic...2/P9040004.jpg http://www.corvetteforum.net/classic...2/P9040003.jpg http://www.corvetteforum.net/classic...2/P9040001.jpg
STW :seeya
Robert
76Stinger
Drifting
Joined: Aug 1999
Posts: 1,468
Likes: 1
From: Kirkland WA
Re: Vacuum Hell on 76 L-48 (76Stinger)
I have a '73 and my setup is *slightly* different, but I have some pretty good pictures on my page of my
http://www.albertpenello.com/vette
Three in particular that might help: http://www.albertpenello.com/vette/c3/eng3.jpg http://www.albertpenello.com/vette/c3/eng1a.jpg http://www.albertpenello.com/vette/c3/eng2a.jpg
It's very possible that the one hose doesn't connect to anything on your engine. My carb has a vacuum line that is just capped -- perhaps the previous owner couldn't find a cap and just capped a hose instead.
Also, it's obvious that you should have an vaccum line going from your EGR to your carb. I can see the open line for it in the carb right by your fuel filter. I would hook that back up too for now until your sure what's going on. Finally -- and I'm not sure if this is a difference in our cars, but my PCV valve on the drivers side goes from a canister below the power brake booster, "T"'s at the PCV, then goes to the front of the carb. It doens't look like your PCV vacuum is hooked up, either.
Hope that was helpful!
http://www.albertpenello.com/vette
Three in particular that might help: http://www.albertpenello.com/vette/c3/eng3.jpg http://www.albertpenello.com/vette/c3/eng1a.jpg http://www.albertpenello.com/vette/c3/eng2a.jpg
It's very possible that the one hose doesn't connect to anything on your engine. My carb has a vacuum line that is just capped -- perhaps the previous owner couldn't find a cap and just capped a hose instead.
Also, it's obvious that you should have an vaccum line going from your EGR to your carb. I can see the open line for it in the carb right by your fuel filter. I would hook that back up too for now until your sure what's going on. Finally -- and I'm not sure if this is a difference in our cars, but my PCV valve on the drivers side goes from a canister below the power brake booster, "T"'s at the PCV, then goes to the front of the carb. It doens't look like your PCV vacuum is hooked up, either.
Hope that was helpful!
Thread Starter
Burning Brakes
Joined: Apr 1999
Posts: 905
Likes: 0
Re: Vacuum Hell on 76 L-48 (Corellian Corvette)
Great shots and a big help. Thanks!
I just replaced the EGR this evening and had not replaced the hoses. Got a little creative and painted the EGR "chrome" just for a little flash.
Your engine looks super. Hope to have mine half that good one day.
STW
Robert
76Stinger :seeya
I just replaced the EGR this evening and had not replaced the hoses. Got a little creative and painted the EGR "chrome" just for a little flash.
Your engine looks super. Hope to have mine half that good one day.
STW
Robert
76Stinger :seeya
Drifting
Joined: Aug 1999
Posts: 1,468
Likes: 1
From: Kirkland WA
Re: Vacuum Hell on 76 L-48 (76Stinger)
Look at my "before" shots on the web page. You'll get there :D
Here's a couple of things you'll want to help polish things up. My tips from 6 months of experience:
1. Lots and Lots of Krylon semi-flat black paint. Used properly, it's the savior of Corvette owners everywhere. :lol:
2. Simple Green. This is the best stuff on the planet. Smells good, cleans grease like a monster, is non-toxic, safe for the environment, and a lot less harsh on other engine parts than most engine cleaners. And you can wash your clothes with it! Buy it by the gallon!
3. Formula 2001. This is like Armor All but not as bad for rubber. Use this on hoses and vacuum lines.
4. Electric Parts Cleaner. Will get all those electrical cables shined up and looking like new. Also good for cleaning tough grease in tight spots.
5. A Dremel. Great for polishing stuff up, and removing generally tough crud.
6. A bench Wire Wheel. This has been the best thing ever. Every nut, bolt and washer that comes off my car gets a run through the bench grinder setup with a wire wheel. I have taken 30-year old rusted bolts off, polished them, and made them look brand new.
Just some suggestions! :cheers:
Here's a couple of things you'll want to help polish things up. My tips from 6 months of experience:
1. Lots and Lots of Krylon semi-flat black paint. Used properly, it's the savior of Corvette owners everywhere. :lol:
2. Simple Green. This is the best stuff on the planet. Smells good, cleans grease like a monster, is non-toxic, safe for the environment, and a lot less harsh on other engine parts than most engine cleaners. And you can wash your clothes with it! Buy it by the gallon!
3. Formula 2001. This is like Armor All but not as bad for rubber. Use this on hoses and vacuum lines.
4. Electric Parts Cleaner. Will get all those electrical cables shined up and looking like new. Also good for cleaning tough grease in tight spots.
5. A Dremel. Great for polishing stuff up, and removing generally tough crud.
6. A bench Wire Wheel. This has been the best thing ever. Every nut, bolt and washer that comes off my car gets a run through the bench grinder setup with a wire wheel. I have taken 30-year old rusted bolts off, polished them, and made them look brand new.
Just some suggestions! :cheers:
Instructor
Joined: Sep 2001
Posts: 204
Likes: 0
From: winston salem nc
Re: Vacuum Hell on 76 L-48 (76Stinger)
Do you have hose for vacum advance on your distributor? I notice the distributor has a vacum module on it. On my 76 I have a unilite breakless system now, but b4 it had a hose running from carb to the vacum advance on my distributor.
My current hoses in use are:
EGR
PCV
Power Brakes
I have an electric choke kit so I no longer have the choke hoses, other than that I have no idea about what would use the additional hoses.
On another note, what are those 2 hardlines running into your intake from carb? My stock intake has a plate there and nipples on the carb hose ends.
Its not part of the EGR system, so the only thing I can think of is the choke.
Someone with smarts can jump in here and educate me at any time, thanx.
Jeff Addington
[Modified by 1976C3, 1:40 PM 9/6/2001]
[Modified by 1976C3, 1:46 PM 9/6/2001]
My current hoses in use are:
EGR
PCV
Power Brakes
I have an electric choke kit so I no longer have the choke hoses, other than that I have no idea about what would use the additional hoses.
On another note, what are those 2 hardlines running into your intake from carb? My stock intake has a plate there and nipples on the carb hose ends.
Its not part of the EGR system, so the only thing I can think of is the choke.
Someone with smarts can jump in here and educate me at any time, thanx.
Jeff Addington
[Modified by 1976C3, 1:40 PM 9/6/2001]
[Modified by 1976C3, 1:46 PM 9/6/2001]
