Vacuum tube placement? - Page 2

atsomepoint · 09-20-2007, 01:50 AM

OK, thank you. Plugging the tube off stops the sound. Plugging the tube in and out of the heater core makes the arm go up and down only if i bypass the wired vsv. I'm thinking that the reason im hearing a sound is that the vsv is not working right. What would you suggest i do? Any hacksaw fixes for this?

mrnickleye · 09-20-2007, 02:32 AM

I by-passed the (not working) vsv when I got the car 5 years ago. I hooked the vac hose directly to the heater water valve.
Normal operation is that vacuum is always applied to it anyways.

The vsv 'only' shuts off vacuum when the temp controls are set to 65* (max. cooling, usually during a/c use).

If you hear a hiss with it hooked up to the water valve, then the valve is bad. Since you don't live in the extreme hot climate I do, then you could by-pass the valve by hooking the two hoses together with a splice tube from the parts store, to keep heater operation.

I always leave a pocket thermometer in the center vent, so I know what temp is coming out of the vents.

I always unplug the valve's vacuum line and golf tee it in the summer, so no water flows thru the heater core. This gives me about 4* colder air out the vents, which I really need for town driving when its over 100*.

atsomepoint · 09-20-2007, 03:47 AM

Thanks for the help, i really appreciate it.
So i can just plug the vacuum hose directly into the heater core and leave the vsv completely unconnected without any problems? (other than when i have the a/c on all the way?)

mrnickleye · 09-20-2007, 02:02 PM

even then the a/c will work fine. normally, if you were to put your temp setting at 66* and above, the water would still flow thru the heater core.

09-20-2007, 02:32 AM	#12
mrnickleye 1000whp postwhore Join Date: Jun 2005 Location: Mojave Desert, Calif. Posts: 1,705	I by-passed the (not working) vsv when I got the car 5 years ago. I hooked the vac hose directly to the heater water valve. Normal operation is that vacuum is always applied to it anyways. The vsv 'only' shuts off vacuum when the temp controls are set to 65* (max. cooling, usually during a/c use). If you hear a hiss with it hooked up to the water valve, then the valve is bad. Since you don't live in the extreme hot climate I do, then you could by-pass the valve by hooking the two hoses together with a splice tube from the parts store, to keep heater operation. I always leave a pocket thermometer in the center vent, so I know what temp is coming out of the vents. I always unplug the valve's vacuum line and golf tee it in the summer, so no water flows thru the heater core. This gives me about 4* colder air out the vents, which I really need for town driving when its over 100*. __________________ Had a Red 1989 N/A. Automatic. Sports Pkg. w/wing. TEMS, and some nice MODS. Sold to a friend 10/08/08.

09-20-2007, 02:02 PM	#14
mrnickleye 1000whp postwhore Join Date: Jun 2005 Location: Mojave Desert, Calif. Posts: 1,705	even then the a/c will work fine. normally, if you were to put your temp setting at 66* and above, the water would still flow thru the heater core. __________________ Had a Red 1989 N/A. Automatic. Sports Pkg. w/wing. TEMS, and some nice MODS. Sold to a friend 10/08/08.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
really could use help - vacuum, race on the 26th	carl johansson	MKIII Supra	2	12-24-2007 11:37 PM
Vacuum Hoses and Diagrams	kewlcoconut	MKIII FAQ	11	08-13-2007 01:41 AM
Newbee: Question About Vacuum lines..	Alejo_NIN	MKIII Supra	3	01-12-2006 07:18 AM
Turbo intake tube	Reeves	MKIII Supra	6	11-24-2005 08:44 AM
vacuum advance/retard	tonster	MKII Supra	0	09-16-2005 06:43 PM

09-20-2007, 01:50 AM	#11
atsomepoint Stock Join Date: Jul 2007 Location: WA Posts: 14	OK, thank you. Plugging the tube off stops the sound. Plugging the tube in and out of the heater core makes the arm go up and down only if i bypass the wired vsv. I'm thinking that the reason im hearing a sound is that the vsv is not working right. What would you suggest i do? Any hacksaw fixes for this?

09-20-2007, 03:47 AM	#13
atsomepoint Stock Join Date: Jul 2007 Location: WA Posts: 14	Thanks for the help, i really appreciate it. So i can just plug the vacuum hose directly into the heater core and leave the vsv completely unconnected without any problems? (other than when i have the a/c on all the way?)