Home  |  Forums  |  914 Info  |  Blogs
 
914World.com - The fastest growing online 914 community!
 
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG. This site is not affiliated with Porsche in any way.
Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners.
 

Welcome Guest ( Log In | Register )

 
 Reply to this topicStart new topic
> Heat Control Flapper Valves, Are the valves on each side the same?
db9146
post Dec 3 2017, 07:05 PM
Post #1


Senior Member
***

Group: Members
Posts: 953
Joined: 21-December 04
From: Atlanta, GA
Member No.: 3,315
Region Association: None
Got a question on the heater control flapper valves on a -6. On mine, the driver side flapper has a solid cap over one side of the flapper valve while the passenger side flapper valve has a hole about 1.5" in diameter in the cap.

Attached Image


Anyone know the a reason for the one having a hole?

User is offlineProfile CardPM
Go to the top of the page
+Quote Post
mepstein
post Dec 3 2017, 07:06 PM
Post #2


914-6 GT in waiting
***************

Group: Members
Posts: 19,308
Joined: 19-September 09
From: Landenberg, PA/Wilmington, DE
Member No.: 10,825
Region Association: MidAtlantic Region
The one with the hole is original. I’m pretty sure the solid one is a replacement.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Socalandy
post Dec 3 2017, 10:32 PM
Post #3


Its got to be Yellow!!!
****

Group: Members
Posts: 2,432
Joined: 29-August 09
From: Orange
Member No.: 10,742
Region Association: Southern California
for 914 and 914-6 there is a left and right. both -6 boxes have the hole as a air bypass


Attached image(s)
Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Garland
post Dec 4 2017, 12:42 AM
Post #4


Restoration Fanatic
***

Group: Members
Posts: 1,329
Joined: 8-January 04
From: ......Michigan......
Member No.: 1,535
Region Association: Upper MidWest
Reference for a 1.7

Attached Image

The “hole” has a cover over it.

Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
rgalla9146
post Dec 4 2017, 08:57 AM
Post #5


Advanced Member
****

Group: Members
Posts: 4,564
Joined: 23-November 05
From: Paramus NJ
Member No.: 5,176
Region Association: None
Trivia.
It's not just the hole on the 6 valves, the corresponding 4 cyl. part is larger in diameter.
4cyl. are black, 6cyl. are grey


Attached thumbnail(s)
Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
mepstein
post Dec 4 2017, 09:30 AM
Post #6


914-6 GT in waiting
***************

Group: Members
Posts: 19,308
Joined: 19-September 09
From: Landenberg, PA/Wilmington, DE
Member No.: 10,825
Region Association: MidAtlantic Region
Rory - if I drilled a 1 1/2” hole in the top of my (four) valves, would it duplicate the sixes in function? Or is their an internal difference.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
rgalla9146
post Dec 4 2017, 11:17 AM
Post #7


Advanced Member
****

Group: Members
Posts: 4,564
Joined: 23-November 05
From: Paramus NJ
Member No.: 5,176
Region Association: None
QUOTE(mepstein @ Dec 4 2017, 10:30 AM) *

Rory - if I drilled a 1 1/2” hole in the top of my (four) valves, would it duplicate the sixes in function? Or is their an internal difference.


Hey Mark
The differences I noted are visible from the outside.
I believe they function exactly the same.
A 4cyl. part with a hole in the cover should be fine.
The function of different diameter caps ? Dump capacity ?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
mepstein
post Dec 4 2017, 11:30 AM
Post #8


914-6 GT in waiting
***************

Group: Members
Posts: 19,308
Joined: 19-September 09
From: Landenberg, PA/Wilmington, DE
Member No.: 10,825
Region Association: MidAtlantic Region
QUOTE(rgalla9146 @ Dec 4 2017, 12:17 PM) *

QUOTE(mepstein @ Dec 4 2017, 10:30 AM) *

Rory - if I drilled a 1 1/2” hole in the top of my (four) valves, would it duplicate the sixes in function? Or is their an internal difference.


Hey Mark
The differences I noted are visible from the outside.
I believe they function exactly the same.
A 4cyl. part with a hole in the cover should be fine.
The function of different diameter caps ? Dump capacity ?

I'll buy that. The 6 fans move a lot of air.
Thanks!
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
db9146
post Dec 4 2017, 01:43 PM
Post #9


Senior Member
***

Group: Members
Posts: 953
Joined: 21-December 04
From: Atlanta, GA
Member No.: 3,315
Region Association: None
So if the hole is only there to dump air, then wouldn't you potentially want them w/o holes to pump more air over the heads on a -6 for cooling?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
mepstein
post Dec 4 2017, 01:50 PM
Post #10


914-6 GT in waiting
***************

Group: Members
Posts: 19,308
Joined: 19-September 09
From: Landenberg, PA/Wilmington, DE
Member No.: 10,825
Region Association: MidAtlantic Region
QUOTE(db9146 @ Dec 4 2017, 02:43 PM) *

So if the hole is only there to dump air, then wouldn't you potentially want them w/o holes to pump more air over the heads on a -6 for cooling?

I think you also need to cool the headers (inside the air box) with some airflow.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
mlindner
post Dec 4 2017, 01:58 PM
Post #11


Senior Member
***

Group: Members
Posts: 1,526
Joined: 11-November 11
From: Merrimac, WI
Member No.: 13,770
Region Association: Upper MidWest
Sorry to go off track but this question just came up today at Accumoto.
(Are the heater control boxes the same....or can be the same on the four and the six). If we bought new ones for a four they would work on a six?. Best, Mark
User is online!Profile CardPM
Go to the top of the page
+Quote Post
GeorgeRud
post Dec 4 2017, 03:28 PM
Post #12


Advanced Member
****

Group: Members
Posts: 3,725
Joined: 27-July 05
From: Chicagoland
Member No.: 4,482
Region Association: Upper MidWest
Either will fit and work, but the hole in the ones for the sixes must have been there to bleed off more air when the heat is turned off.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Socalandy
post Dec 4 2017, 03:29 PM
Post #13


Its got to be Yellow!!!
****

Group: Members
Posts: 2,432
Joined: 29-August 09
From: Orange
Member No.: 10,742
Region Association: Southern California
Yes but and will have a slightly different angle going to the longs
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
mepstein
post Dec 12 2017, 12:44 PM
Post #14


914-6 GT in waiting
***************

Group: Members
Posts: 19,308
Joined: 19-September 09
From: Landenberg, PA/Wilmington, DE
Member No.: 10,825
Region Association: MidAtlantic Region
Homemade 6 flapper box.
Found a couple rusty ones.
Blasted, cut hole, powder coated.


Attached thumbnail(s)
Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
raynekat
post Dec 12 2017, 06:13 PM
Post #15


Advanced Member
****

Group: Members
Posts: 2,159
Joined: 30-December 14
From: Coeur d'Alene, Idaho
Member No.: 18,263
Region Association: Pacific Northwest
QUOTE(mepstein @ Dec 12 2017, 10:44 AM) *

Homemade 6 flapper box.
Found a couple rusty ones.
Blasted, cut hole, powder coated.


Those look great.
What did you use to make the hole?
And how big is the hole?
Might go this way with 914 heater boxes for my six conversion.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
mepstein
post Dec 12 2017, 06:23 PM
Post #16


914-6 GT in waiting
***************

Group: Members
Posts: 19,308
Joined: 19-September 09
From: Landenberg, PA/Wilmington, DE
Member No.: 10,825
Region Association: MidAtlantic Region
I think it was 1- 1 1/4”. It was a wurth hole saw that I chucked into the drill press. Drilled the hole, blasted the piece and then powder coated. I had 5 that were pretty rusty but still usable. I hope to make a pair or 2.

I think bdstone charges ~$50 for refurbished flapper boxes. By the time you throw out the broken ones, fix the ones that can be fixed, blast and powder coat, $50+ is a good deal.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
DRPHIL914
post Dec 14 2017, 08:54 AM
Post #17


Dr. Phil
*****

Group: Members
Posts: 5,768
Joined: 9-December 09
From: Bluffton, SC
Member No.: 11,106
Region Association: South East States
I sent mine to bruce to be done, he has many of them in his stash, turns out my seals were in good condition , just a bit of cleaning and repainted- but if you are missing anything talk to Bruce he probably has it.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
sixaddict
post Feb 8 2022, 10:09 AM
Post #18


Senior Member
***

Group: Members
Posts: 805
Joined: 22-January 09
From: Panama City Beach, FL
Member No.: 9,961
Region Association: South East States
Great information ……
Thanks!! (IMG:style_emoticons/default/beer.gif)
User is online!Profile CardPM
Go to the top of the page
+Quote Post
« Next Oldest · 914World Garage · Next Newest »
 

Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 

Display Mode: Standard · Switch to: Linear+ · Switch to: Outline

Track this topic · Email this topic · Print this topic · Subscribe to this forum

- Lo-Fi Version Time is now: 4th June 2024 - 05:43 AM
Invision Power Board v9.1.4 © 2024  IPS, Inc.
All rights reserved 914World.com © since 2002
914World.com is the fastest growing online 914 community!
We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ...