 Impeller marks for valve adjust |
|
|
|
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. |
|
|
  |
| jsf322 |
 Mar 26 2006, 04:14 PM
Post
#1
|
|
Member  Group: Members Posts: 83 Joined: 1-December 05 From: Baldwin, New York Member No.: 5,220  |
I was looking over my '76 2.0 getting ready to attempt my first valve adjustment and found marks different than what I had read. I found a yellow dot on the fan when the distributor rotor was pointing towards 7 o'clock and a notch in the flywheel through the opening on the bottom of the transmission. Is this cylinder #2 at TDC. I found another mark on one of the impeller blades when the distributor rotor was pointing towards the notch in the distributor housing. I assume this is the mark for cylinder #1 TDC but I am not sure. It did not look like what I expected. It was just a yellow line on the blade. I have attached some photos.
Attached image(s) 
|
   |
 
|
| jsf322 |
Mar 26 2006, 04:16 PM
Post
#2
|
|
Member Group: Members Posts: 83 Joined: 1-December 05 From: Baldwin, New York Member No.: 5,220 |
The picture above was with the distributor pointing towards the #2 wire tower. The picture below is the mark with the distributor pointing towards the notch in the housing which seems to go with the #1 wire tower.
Attached image(s) 
|
|
|
|
| echocanyons |
Mar 26 2006, 06:52 PM
Post
#3
|
|
Advanced Member Group: Benefactors Posts: 2,094 Joined: 24-December 02 From: Bay Area, CA Member No.: 7 Region Association: Central California 
|
|
|
|
|
| BMartin914 |
Mar 26 2006, 07:01 PM
Post
#4
|
|
||| Group: Members Posts: 1,408 Joined: 30-May 04 From: Oregon Member No.: 2,128 Region Association: Pacific Northwest |
The notches you need to look for are on the opposite side of the impeller than the painted marks in your pics - and they are actual notches in the impeller, not painted-on marks. The marks in your pics were most likely done by a PO to make the job easier.
The best thing to do (in addition to using the Krusty method) is to verify TDC and make new marks for future adjustments. I think the Kap'n may go mover this in his article - it's been a while since I reas through it. |
|
|
|
| jsf322 |
Mar 26 2006, 07:46 PM
Post
#5
|
|
Member Group: Members Posts: 83 Joined: 1-December 05 From: Baldwin, New York Member No.: 5,220 |
thanks for the info. I believe this is actually the mark I should be looking at for cylinder 1 TDC. It is on the opposite side of the fan than the yellow marks. Thanks.
Attached image(s) 
|
|
|
|
| Triaddave |
Mar 26 2006, 09:14 PM
Post
#6
|
|
Member Group: Members Posts: 244 Joined: 31-December 03 From: olympia,wa Member No.: 1,478 |
there should be another mark close to where you are at. on one of ours, it a 0. on the other it is white. i think what you are showing is the 27 degree advance mark.
|
|
|
|
| drewvw |
Mar 26 2006, 09:20 PM
Post
#7
|
||
|
new england car guy Group: Members Posts: 1,631 Joined: 24-February 06 From: Boston, MA Member No.: 5,630 Region Association: North East States |
I agree. I did the valves this weekend for the first time as well and repainted the #1 TDC mark and the 27degree mark like that. There was no TDC mark on mine, but I did find a red dot for the timing mark and I painted the fan blade to make the mark bigger just like that..... find that little scribe mark on the distributor at 10 o'clock for #1 TDC and I bet that paint mark on the fan blade will be the 27 degree mark to the left of it (approx 2 inches). The pelican template printout helped me alot. http://www.pelicanparts.com/techarticles/9.../914_timing.pdf |
||
|
|
|
||
| BMartin914 |
Mar 26 2006, 10:15 PM
Post
#8
|
|
||| Group: Members Posts: 1,408 Joined: 30-May 04 From: Oregon Member No.: 2,128 Region Association: Pacific Northwest |
That would be the mark, and yes, that is for 27' BTDC. The white notch is TDC.
|
|
|
|
| jsf322 |
Mar 27 2006, 02:17 PM
Post
#9
|
|
Member Group: Members Posts: 83 Joined: 1-December 05 From: Baldwin, New York Member No.: 5,220 |
amazingly I went completely around on the fan and there is no white mark. I did discover though that the yellow mark that a PO put on the opposite side of the fan does coordinate with the notch in the flywheel that you can feel on top of the transmission when you hit #1 or #3 TDC. I guess I have my marks. Thanks.
|
|
|
|
|
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 19th May 2024 - 07:57 PM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.