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
> Valve Adjustment, Unable to adjust
majorpikins
post Jan 23 2013, 12:31 PM
Post #1


Newbie
*

Group: Members
Posts: 2
Joined: 31-July 12
From: corona
Member No.: 14,742
Region Association: Southern California
In preparation for doing a valve adjustment on my 73 1.7 (1.9 big bore) I put the engine in TDC for cylynder one by locating the groove on the upper most part of the flywheel. There also was some sort of mark appearing in the V at the fan housing. When I went to do the adjustment on the number 1 cylynder I was unable to get the feeler gauge under adjusting screw of the intake valve. It appears to be in the open position. Upon examination I noticed that the destributor rotor is pointing to the number 3 cylinder wire location? I just got the car recently and it was running fine except for some backfiring upon deceleration. Any ideas what is going on here?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Rockaria
post Jan 23 2013, 12:35 PM
Post #2


ZippidyDoDah...
***

Group: Members
Posts: 817
Joined: 2-May 03
From: Southwest, USA
Member No.: 645
Region Association: None
QUOTE(majorpikins @ Jan 23 2013, 11:31 AM) *

In preparation for doing a valve adjustment on my 73 1.7 (1.9 big bore) I put the engine in TDC for cylynder one by locating the groove on the upper most part of the flywheel. There also was some sort of mark appearing in the V at the fan housing. When I went to do the adjustment on the number 1 cylynder I was unable to get the feeler gauge under adjusting screw of the intake valve. It appears to be in the open position. Upon examination I noticed that the destributor rotor is pointing to the number 3 cylinder wire location? I just got the car recently and it was running fine except for some backfiring upon deceleration. Any ideas what is going on here?


You are not at top dead center for #1. Spin the engine till the distributor points to #1 position and you will see the groove on the flywheel line up like before. Then check. Things should be better and able to adjust.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
mrbubblehead
post Jan 23 2013, 01:06 PM
Post #3


Twodollardoug
***

Group: Members
Posts: 1,155
Joined: 17-December 10
From: calimesa ca.
Member No.: 12,492
Region Association: Southern California
You need to rotate the engine 360 degrees. clockwise or anti-clockwise, it dosn't matter at this point.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Rand
post Jan 23 2013, 01:09 PM
Post #4


Cross Member
*****

Group: Members
Posts: 7,409
Joined: 8-February 05
From: OR
Member No.: 3,573
Region Association: None
Wrong stroke
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Kirmizi
post Jan 23 2013, 01:43 PM
Post #5


Senior Member
***

Group: Members
Posts: 836
Joined: 12-February 06
From: Wyoming, US
Member No.: 5,568
Region Association: None
QUOTE(Rockaria @ Jan 23 2013, 10:35 AM) *

QUOTE(majorpikins @ Jan 23 2013, 11:31 AM) *

In preparation for doing a valve adjustment on my 73 1.7 (1.9 big bore) I put the engine in TDC for cylynder one by locating the groove on the upper most part of the flywheel. There also was some sort of mark appearing in the V at the fan housing. When I went to do the adjustment on the number 1 cylynder I was unable to get the feeler gauge under adjusting screw of the intake valve. It appears to be in the open position. Upon examination I noticed that the destributor rotor is pointing to the number 3 cylinder wire location? I just got the car recently and it was running fine except for some backfiring upon deceleration. Any ideas what is going on here?


You are not at top dead center for #1. Spin the engine till the distributor points to #1 position and you will see the groove on the flywheel line up like before. Then check. Things should be better and able to adjust.


(IMG:style_emoticons/default/agree.gif)

The popping on decel could be an exhaust leak, or running rich.

Mike
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
majorpikins
post Jan 23 2013, 02:15 PM
Post #6


Newbie
*

Group: Members
Posts: 2
Joined: 31-July 12
From: corona
Member No.: 14,742
Region Association: Southern California
OK got it thanks guys!
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
mr914
post Jan 23 2013, 05:33 PM
Post #7


914 Hillbilly
***

Group: Members
Posts: 576
Joined: 11-January 03
From: Lincoln NE
Member No.: 131
Region Association: None
I've seen a couple of cars where the distributor gear was installed 180 degrees out.

Had me scratching my head when Iran into this

When you verify #1' trace the plug wire to ensure
User is offlineProfile 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: 21st May 2024 - 05:19 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 ...