Leaking heater bypass valve at max AC

Capri302 · 05-25-2010, 10:45 AM

Hello. to all AC- experts.

Myself I am a novice in this trade. But, I have come so far as to find the name on my leaking "tap", it's called the heater bypass valve. It leaks when it's in the MAX AC- position only.

The AC- system is empty (will soon be filled by professionals, yes). and I wonder: will this continue even with a filled/ pressurized AC- system?

Will it need to be replaced?

Here's the valve in question:
http://www.explorerforum.com/forums/...d.php?t=190431

I't a 97 OHV V6 (European version).

Hope someone can help.
Rune. Norway.

**Maniak** · 05-25-2010, 11:04 AM

Yup, if its leaking now it will leak later. Its actually not connected to the a/c. It is inline with the heater (coolant hoses) and makes the water/coolant bypass the heater core to help get the a/c even colder when your on max a/c (and in the off position too IIRC).

I have found that buying the cheap ones from the auto parts store just don't last. That is one of the few motorcraft (ford) parts I buy.

~Mark

Capri302 · 05-25-2010, 01:33 PM

OK, Maniak. (We gotta be related, because i am also known by the name "Caprimaniac"...)

Thanks for the help so far & for letting me know how the function of this valve.

Can anybody come up with the correct part number too? It'd make it alot easier to order one... Cos I gotta change it.
So, it's a 1997 4.0 OHV Explorer.

RS

**Maniak** · 05-25-2010, 01:54 PM

ford part # is #F87Z18495AA and the motorcraft part # is MOTORCRAFT Part # YG350.

Thats for the 4 port valve which is what it looks like you have...

Rockauto has them for $16 and there is normally a 5% discount code for rockauto on here (have to search for the thread)..

~Mark

Capri302 · 05-26-2010, 02:29 AM

Would love to get it from Rockauto, but the shipping would be out of proportions as I live across the Atlantic.

Thank you, once again Maniak.

(I will have to check the ports to see if has 4; I seem to remember only3, but I might be wrong).

Regards
RS

Capri302 · 06-12-2010, 02:35 PM

A quick update: Now fixed, new valve fitted.

What did I pay? 89,5$ at a Ford- dealer here in Norway.

It's a shame.

05-25-2010, 10:45 AM	#1
Capri302 Wannabe Elite Explorer SKJETTEN 4.0 4x4 1997 Explorer Join Date: Jun 2006 Posts: 27 Vehicle Specs (Original Poster)	Leaking heater bypass valve at max AC Hello. to all AC- experts. Myself I am a novice in this trade. But, I have come so far as to find the name on my leaking "tap", it's called the heater bypass valve. It leaks when it's in the MAX AC- position only. The AC- system is empty (will soon be filled by professionals, yes). and I wonder: will this continue even with a filled/ pressurized AC- system? Will it need to be replaced? Here's the valve in question: http://www.explorerforum.com/forums/...d.php?t=190431 I't a 97 OHV V6 (European version). Hope someone can help. Rune. Norway.

05-25-2010, 11:04 AM	#2
Maniak Moderator-Stock 91-94 Vail, Arizona 1992 XLT 4x4 Join Date: Feb 1999 Posts: 10,813 Vehicle Specs	Yup, if its leaking now it will leak later. Its actually not connected to the a/c. It is inline with the heater (coolant hoses) and makes the water/coolant bypass the heater core to help get the a/c even colder when your on max a/c (and in the off position too IIRC). I have found that buying the cheap ones from the auto parts store just don't last. That is one of the few motorcraft (ford) parts I buy. ~Mark __________________ Click HERE to see our Explorer Specs

05-25-2010, 01:54 PM	#4
Maniak Moderator-Stock 91-94 Vail, Arizona 1992 XLT 4x4 Join Date: Feb 1999 Posts: 10,813 Vehicle Specs	ford part # is #F87Z18495AA and the motorcraft part # is MOTORCRAFT Part # YG350. Thats for the 4 port valve which is what it looks like you have... Rockauto has them for $16 and there is normally a 5% discount code for rockauto on here (have to search for the thread).. ~Mark __________________ Click HERE to see our Explorer Specs

05-25-2010, 01:33 PM	#3
Capri302 Wannabe Elite Explorer SKJETTEN 4.0 4x4 1997 Explorer Join Date: Jun 2006 Posts: 27 Vehicle Specs (Original Poster)	OK, Maniak. (We gotta be related, because i am also known by the name "Caprimaniac"...) Thanks for the help so far & for letting me know how the function of this valve. Can anybody come up with the correct part number too? It'd make it alot easier to order one... Cos I gotta change it. So, it's a 1997 4.0 OHV Explorer. RS

05-26-2010, 02:29 AM	#5
Capri302 Wannabe Elite Explorer SKJETTEN 4.0 4x4 1997 Explorer Join Date: Jun 2006 Posts: 27 Vehicle Specs (Original Poster)	Would love to get it from Rockauto, but the shipping would be out of proportions as I live across the Atlantic. Thank you, once again Maniak. (I will have to check the ports to see if has 4; I seem to remember only3, but I might be wrong). Regards RS

06-12-2010, 02:35 PM	#6
Capri302 Wannabe Elite Explorer SKJETTEN 4.0 4x4 1997 Explorer Join Date: Jun 2006 Posts: 27 Vehicle Specs (Original Poster)	A quick update: Now fixed, new valve fitted. What did I pay? 89,5$ at a Ford- dealer here in Norway. It's a shame.