How does the vaccine work on the heater valve. ‘92 745 Turbo

mr brick driver · 08-09-2021, 09:30 AM

I have a 1992 745 Turbo. I went to NAPA to find an all metal replacement. The employee helping me asked if vacuum oped or shut the valve. I do not know. Do you know? Thanks.

Fa182 · 08-09-2021, 10:39 AM

Not sure how a vaccine would work on a heater valve, I think there are little to no studies out there yet.

What I am pretty sure about is that the vacuum shuts the valve, so they are open by default.

Motorcraft YG136 is the valve people have used from what I've read.

white855T · 08-09-2021, 10:40 AM

Quote:

Originally Posted by Fa182

Not sure how a vaccine would work on a heater valve, I think there are little to no studies out there yet.

What I am pretty sure about is that the vacuum shuts the valve, so they are open by default.

Motorcraft YG136 is the valve people have used from what I've read.

Yep this is the one that I've used in the past. Works great.

oldnfast · 08-09-2021, 11:37 AM

Yes the YG136 is great. That valve is the first part on the stage zero list for any new to me 7/9 Volvo

volvowagoon · 08-09-2021, 11:44 AM

Autocorrected to vaccine instead of vacuum?

I don't 7/9, so this is the only way I'm able to help.

MasterBlaster · 08-09-2021, 04:47 PM

The valve is normally wide open.
The valve closes under vacuum, usually only when the system is set to "maximum cooling".

This simply blocks coolant flow through the heater core, and (some say) disrupts the flow through the rear cylinders, possibly making them run too hot.

Common options seem to be:

The stock half-metal style that tends to break off one nipple:

The all-plastic version:

The all-plastic "flying saucer style with no external shaft to leak:

The mentioned YG136 version, that looks half-plastic, but may have an all-metal
version:

The all-matal AC Delco 15-5320:

And of course, the GM 660-1357 bypass style, that "short-circuits" the flow and sends it back, instead of just cutting it off:

http://turbobricks.com/forums/showthread.php?t=246617

PCH · 08-09-2021, 04:57 PM

Delco 15-5320 was mentioned before as good to use: http://turbobricks.com/forums/showthread.php?t=242812

Otto Mattik · 08-10-2021, 05:17 AM

Quote:

Originally Posted by MasterBlaster

And of course, the GM 660-1357 bypass style, that "short-circuits" the flow and sends it back, instead of just cutting it off:

http://turbobricks.com/forums/showthread.php?t=246617

Almost looks like the one on my Ranger

Janspeed · 08-17-2021, 07:52 AM

GM 660-1357 bypass style seems a way smarter solution.

MadDog_945 · 08-17-2021, 08:40 AM

But where to route the bypass.. No pnp h
Right here

08-09-2021, 09:30 AM	#1
mr brick driver Board Member Join Date: Feb 2004	How does the vaccine work on the heater valve. ‘92 745 Turbo I have a 1992 745 Turbo. I went to NAPA to find an all metal replacement. The employee helping me asked if vacuum oped or shut the valve. I do not know. Do you know? Thanks. __________________ 1992 745 TI+ anti slip differential, 1983 242 DL, 1990 780 Bertone, 1983 242 Group A X 2

08-09-2021, 10:39 AM	#2
Fa182 Stage 1 Join Date: Apr 2016 Location: Austria	Not sure how a vaccine would work on a heater valve, I think there are little to no studies out there yet. What I am pretty sure about is that the vacuum shuts the valve, so they are open by default. Motorcraft YG136 is the valve people have used from what I've read. __________________

08-09-2021, 11:44 AM	#5
volvowagoon Board Member Join Date: Jul 2012 Location: Franklin, IN	Autocorrected to vaccine instead of vacuum? I don't 7/9, so this is the only way I'm able to help. __________________ Feedback - https://forums.turbobricks.com/showt...ht=volvowagoon 1986 Buick Grand National - Restored to stock™ 2002 Camaro V6 T5 +T - The trashy car that's fun to drive 2010 C30 T5 - The boring but trusty daily - 199k 1989 245 DL - The boring but not trusty daily - 233k IG: @v6buick

08-09-2021, 04:47 PM	#6
MasterBlaster Board Member Join Date: Feb 2009 Location: Port Coquitlam	The valve is normally wide open. The valve closes under vacuum, usually only when the system is set to "maximum cooling". This simply blocks coolant flow through the heater core, and (some say) disrupts the flow through the rear cylinders, possibly making them run too hot. Common options seem to be: The stock half-metal style that tends to break off one nipple: The all-plastic version: The all-plastic "flying saucer style with no external shaft to leak: The mentioned YG136 version, that looks half-plastic, but may have an all-metal version: The all-matal AC Delco 15-5320: And of course, the GM 660-1357 bypass style, that "short-circuits" the flow and sends it back, instead of just cutting it off: http://turbobricks.com/forums/showthread.php?t=246617 __________________ 1990 740GL 534,000 km so far... Last edited by MasterBlaster; 08-09-2021 at 05:11 PM..

08-09-2021, 04:57 PM	#7
PCH Board Member Join Date: Oct 2008 Location: Oxnard, SoCal	Delco 15-5320 was mentioned before as good to use: http://turbobricks.com/forums/showthread.php?t=242812 __________________ 🇺🇦 Feedback: http://forums.turbobricks.com/showthread.php?t=341280

08-09-2021, 11:37 AM	#4
oldnfast Board Member Join Date: Feb 2011 Location: connecticut	Yes the YG136 is great. That valve is the first part on the stage zero list for any new to me 7/9 Volvo

08-17-2021, 07:52 AM	#9
Janspeed Board Member Join Date: Sep 2005	GM 660-1357 bypass style seems a way smarter solution.

08-17-2021, 08:40 AM	#10
MadDog_945 Våga Vägra 8V Join Date: Apr 2006 Location: Lower Saxony	But where to route the bypass.. No pnp h Right here __________________ '93 945 B234FT Build '93 245 Racecar

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