2 - 6 cylinder line questions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Luvlegs · 01-16-2008, 12:31 PM

Added some stuff this weekend

1) Where does the vacuum line on the air cleaner connect to (coiled beside snorkle in picture) - one to actuator on snorkle and the other to....???

2)What gets connected to the large port on the riser from the carb? (would it be a line from port (just under the end of the snorkle in the picture) at the front part of the valve cover where I have a little breather now)?

As always, Thanks for any input!

Botietruck · 01-16-2008, 02:14 PM

I'll have to check on the vacuum line, but the large line on the riser goes to a hole in the valve cover on the left front. This is an old pic before I did the air cleaner swap. The older pic is from a board member some time ago, can't remember who. Hope he doesn't mind sharing it.

IMG]http://i6.photobucket.com/albums/y249/Botietruck/aircond.jpg[/IMG]

Luvlegs · 01-17-2008, 03:29 AM

Cool, that's what I thought on the large one. Now to figure out the little one - it goes from the snorkle module, up under the air cleaner to the temp sensor in there, off the temp sensor and back out to ?????

One question for you Botie, at the top rear of the valve cover, you have a very long hose going to the port beside the carb. Why is it so long? (the one on mine is only about 14")

68gmsee · 01-17-2008, 06:08 AM

Quote:

Originally Posted by Luvlegs

Cool, that's what I thought on the large one. Now to figure out the little one - it goes from the snorkle module, up under the air cleaner to the temp sensor in there, off the temp sensor and back out to ?????

I've got a manual that shows the small hose from the snorkel to the temp sensor. The other one coming from the temp sensor just says "vacuum hose to TVS on air cleaner" but doesn't show where it connects. I assume that means to the Thermal Vacuum Sensor. Not sure where that is unless they mean the Thermal Vacuum Motor on the snorkel. I've seen where they call some components different names on occasion.

I'll scan pic if I can get the $%^&* to work right.

68gmsee · 01-17-2008, 06:42 AM

Here's a pic...

68gmsee · 01-17-2008, 06:49 AM

And here's the Haynes description of how it works.

http://www.haynes.com/files/product/13.10210sp.pdf

btw. My GMC truck did not have the same setup but I believe it's because it was a 68. I've been thinking of trying to find the stock breather and convert it to the way it was.

Luvlegs · 01-17-2008, 07:41 AM

Thanks 68 - that's what I have now and just like the pic, my hose is just hanging there

But now, I also see a component call a "delay valve".... wonder what year that is from.. and, nope, I don't have one

Botietruck · 01-17-2008, 01:25 PM

Quote:

Originally Posted by Luvlegs

Cool, that's what I thought on the large one. Now to figure out the little one - it goes from the snorkle module, up under the air cleaner to the temp sensor in there, off the temp sensor and back out to ?????

One question for you Botie, at the top rear of the valve cover, you have a very long hose going to the port beside the carb. Why is it so long? (the one on mine is only about 14")

I'm not sure how I ended up with that long hose, but I didn't want to cut it to size until I get everything in place...didn't want to cut it too short. After I get the air cleaner all fastened down, I'll cut the hose to length.

68gmsee · 01-17-2008, 01:51 PM

Okay, one more time. Of all places Auto Zone has the best explanation for the Thermac System. Shows where the hoses go and how they're connected. Check it out... You can click the pics to enlarge.

http://www.autozone.com/az/cds/en_us...rInfoPages.htm

Luvlegs · 01-17-2008, 05:11 PM

Botie - gotcha on the hose!
68gm - that link was better - it says it conects to the manifold vacuum T.
Now I gotta find a T....

I think I can figure it up from there.... Thanks all!

AuggieStyle · 01-17-2008, 06:23 PM

Quote:

Originally Posted by Botietruck

I'll have to check on the vacuum line, but the large line on the riser goes to a hole in the valve cover on the left front. This is an old pic before I did the air cleaner swap. The older pic is from a board member some time ago, can't remember who. Hope he doesn't mind sharing it.

IMG]http://i6.photobucket.com/albums/y249/Botietruck/aircond.jpg[/IMG]

sorry dont mean to hijack this thread but that engine looks really nice.........where did you get the brakets for the A/C compressor? or is that a aftermarket compressor.

Longhorn321 · 01-17-2008, 06:41 PM

Quote:

Originally Posted by Luvlegs

mine is only about 14")

Hmmmm.....Hose envy!

Botietruck · 01-18-2008, 09:05 AM

Auggie, I found those brackets in a salvage yard. They are from a 250 engine and the compressor is a NAPA Reman for the '71 250 engine. Thanks for the comments!

Mt Man Chad · 01-23-2008, 08:11 AM

Some good info for us 6 banger's! =O)

01-16-2008, 12:31 PM	#1
Luvlegs Registered User Join Date: Sep 2005 Location: Smith Mountain Lake Virginia Posts: 1,537	2 - 6 cylinder line questions Added some stuff this weekend 1) Where does the vacuum line on the air cleaner connect to (coiled beside snorkle in picture) - one to actuator on snorkle and the other to....??? 2)What gets connected to the large port on the riser from the carb? (would it be a line from port (just under the end of the snorkle in the picture) at the front part of the valve cover where I have a little breather now)? As always, Thanks for any input! Attached Images __________________ "A cat will almost always blink when hit between the eyes with a ball peen hammer" (you don't always have to state the obvious) Wear your PPE! You can eat with false teeth but you can't see with a false eye. 1959 Studebaker Silverhawk 350/400 1972 C10 L6 3OTT 2005 F350 - Built - whew!

01-16-2008, 02:14 PM	#2
Botietruck '71 chevy s.bed/s.side Join Date: Mar 2005 Location: Chesapeake, VA Posts: 1,571	Re: 2 - 6 cylinder line questions I'll have to check on the vacuum line, but the large line on the riser goes to a hole in the valve cover on the left front. This is an old pic before I did the air cleaner swap. The older pic is from a board member some time ago, can't remember who. Hope he doesn't mind sharing it. IMG]http://i6.photobucket.com/albums/y249/Botietruck/aircond.jpg[/IMG] __________________ STILL PLAYS WITH CARS...AND TRUCKS!! Parents! Be good to your kids...they get to choose your nursing home! 250 I-6 with a 3 speed Saginaw and Borg Warner Overdrive...She's got overdrive! Last edited by Botietruck; 01-16-2008 at 02:23 PM.

01-17-2008, 03:29 AM	#3
Luvlegs Registered User Join Date: Sep 2005 Location: Smith Mountain Lake Virginia Posts: 1,537	Re: 2 - 6 cylinder line questions Cool, that's what I thought on the large one. Now to figure out the little one - it goes from the snorkle module, up under the air cleaner to the temp sensor in there, off the temp sensor and back out to ????? One question for you Botie, at the top rear of the valve cover, you have a very long hose going to the port beside the carb. Why is it so long? (the one on mine is only about 14") __________________ "A cat will almost always blink when hit between the eyes with a ball peen hammer" (you don't always have to state the obvious) Wear your PPE! You can eat with false teeth but you can't see with a false eye. 1959 Studebaker Silverhawk 350/400 1972 C10 L6 3OTT 2005 F350 - Built - whew!

01-17-2008, 06:42 AM	#5
68gmsee Active Member Join Date: Jul 2007 Location: Centrally located between Houston, Austin and Waco. BCS area. Posts: 7,947	Re: 2 - 6 cylinder line questions Here's a pic... Attached Images

01-17-2008, 06:49 AM	#6
68gmsee Active Member Join Date: Jul 2007 Location: Centrally located between Houston, Austin and Waco. BCS area. Posts: 7,947	Re: 2 - 6 cylinder line questions And here's the Haynes description of how it works. http://www.haynes.com/files/product/13.10210sp.pdf btw. My GMC truck did not have the same setup but I believe it's because it was a 68. I've been thinking of trying to find the stock breather and convert it to the way it was.

01-17-2008, 07:41 AM	#7
Luvlegs Registered User Join Date: Sep 2005 Location: Smith Mountain Lake Virginia Posts: 1,537	Re: 2 - 6 cylinder line questions Thanks 68 - that's what I have now and just like the pic, my hose is just hanging there But now, I also see a component call a "delay valve".... wonder what year that is from.. and, nope, I don't have one __________________ "A cat will almost always blink when hit between the eyes with a ball peen hammer" (you don't always have to state the obvious) Wear your PPE! You can eat with false teeth but you can't see with a false eye. 1959 Studebaker Silverhawk 350/400 1972 C10 L6 3OTT 2005 F350 - Built - whew!

01-17-2008, 01:51 PM	#9
68gmsee Active Member Join Date: Jul 2007 Location: Centrally located between Houston, Austin and Waco. BCS area. Posts: 7,947	Re: 2 - 6 cylinder line questions Okay, one more time. Of all places Auto Zone has the best explanation for the Thermac System. Shows where the hoses go and how they're connected. Check it out... You can click the pics to enlarge. http://www.autozone.com/az/cds/en_us...rInfoPages.htm

01-17-2008, 05:11 PM	#10
Luvlegs Registered User Join Date: Sep 2005 Location: Smith Mountain Lake Virginia Posts: 1,537	Re: 2 - 6 cylinder line questions Botie - gotcha on the hose! 68gm - that link was better - it says it conects to the manifold vacuum T. Now I gotta find a T.... I think I can figure it up from there.... Thanks all! __________________ "A cat will almost always blink when hit between the eyes with a ball peen hammer" (you don't always have to state the obvious) Wear your PPE! You can eat with false teeth but you can't see with a false eye. 1959 Studebaker Silverhawk 350/400 1972 C10 L6 3OTT 2005 F350 - Built - whew!

01-18-2008, 09:05 AM	#13
Botietruck '71 chevy s.bed/s.side Join Date: Mar 2005 Location: Chesapeake, VA Posts: 1,571	Re: 2 - 6 cylinder line questions Auggie, I found those brackets in a salvage yard. They are from a 250 engine and the compressor is a NAPA Reman for the '71 250 engine. Thanks for the comments! __________________ STILL PLAYS WITH CARS...AND TRUCKS!! Parents! Be good to your kids...they get to choose your nursing home! 250 I-6 with a 3 speed Saginaw and Borg Warner Overdrive...She's got overdrive!

01-23-2008, 08:11 AM	#14
Mt Man Chad Registered User Join Date: Oct 2006 Location: Oakridge Oregon Posts: 1,865	Re: 2 - 6 cylinder line questions Some good info for us 6 banger's! =O) __________________ 68 CST SWB - Gold/White 50th anniversary /TH350/Buddy Buckets/3.73 Posi/dogdish caps. 68 K10 Burb - Gold/White 327/SM465/NP205/3.73 "Daa Burb" build thread

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