Valve Adjustment Question |
|
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. |
|
Valve Adjustment Question |
kbrunk1 |
Nov 1 2012, 07:52 PM
Post
#1
|
Brunk Group: Members Posts: 180 Joined: 13-November 11 From: Dallas,Texas 73 2.0 FI Member No.: 13,778 Region Association: South East States |
Ok - I can feel with my fingers on the top of the flywheel the mark.
So as I understand I am at TDC. (made a mark in window on bottom) Now I assume I check #1 Ex & #2 In #3 Ex & #4 In -- in this position (#1 exhause is open) Then Turn 90 degrees more on rotor until mark on flywheel and continue. #4 Ex & #1 In #2 Ex & #3 In #2 Ex & #3 In #4 Ex & #1 In #1 Ex & #2 In #3 Ex & #4 In #4 Ex & #1 In #2 Ex & #3 In #3 Ex & #4 In #1 Ex & #2 In My confusion is some say at TDC nothing is open....??? Mine #1Exh seems to be open unless I missed someting? |
Rand |
Nov 1 2012, 07:59 PM
Post
#2
|
Cross Member Group: Members Posts: 7,409 Joined: 8-February 05 From: OR Member No.: 3,573 Region Association: None |
Deja vu. Did you already forget your other thread(s)?
Oh yeah, this is the secret spam test that flies under the radar. |
MDG |
Nov 1 2012, 08:22 PM
Post
#3
|
Wolf in wolf's clothing. Group: Members Posts: 8,652 Joined: 3-February 09 From: Toronto Member No.: 10,018 Region Association: None |
Deja vu. Did you already forget your other thread(s)? Oh yeah, this is the secret spam test that flies under the radar. (IMG:style_emoticons/default/agree.gif) 4th valve adjustment thread in less than 48 hours. Ummm. . . you do realize you keep hitting the 'new thread' button instead of the 'add reply' button, right? (IMG:style_emoticons/default/poke.gif) |
kbrunk1 |
Nov 1 2012, 08:40 PM
Post
#4
|
Brunk Group: Members Posts: 180 Joined: 13-November 11 From: Dallas,Texas 73 2.0 FI Member No.: 13,778 Region Association: South East States |
If you read the other thread there was so much jibberish that it got real confusing.
The real issue that I was trying to get confirmed is that at TDC (per folks on that thread) they say all valves should be closed. My concern is that I have one open. Can anyone comment on just this question? Thanks |
Rand |
Nov 1 2012, 09:06 PM
Post
#5
|
Cross Member Group: Members Posts: 7,409 Joined: 8-February 05 From: OR Member No.: 3,573 Region Association: None |
If you read the other thread there was so much jibberish that it got real confusing. The real issue that I was trying to get confirmed is that at TDC (per folks on that thread) they say all valves should be closed. My concern is that I have one open. Can anyone comment on just this question? Thanks There's always a valve open. And closed. Try reading the how-to threads again. Or, since I polluted this one, maybe open a new thread? Or two? Or maybe you could start at the top of THIS thread and just DO IT. Some member of the sandbox is impersonating brunk. Ok, joke is over. oOF. |
Cap'n Krusty |
Nov 1 2012, 10:15 PM
Post
#6
|
Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
At TDC compression stroke for any given cylinder, both valves in THAT cylinder are closed. That means you have to turn the crankshaft 180 degrees for EACH successive cylinder's adjustment. That, my friend, is why my method is simpler and superior to the one described in the Pelican tech article. I don't have to find TDC, nor do I have to make any marks or jump up and down to look at the distributor rotor. I'm old, and I don't need that shit.
The Cap'n |
Dave_Darling |
Nov 1 2012, 11:10 PM
Post
#7
|
914 Idiot Group: Members Posts: 14,991 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California |
The flywheel mark being at the top means you're at TDC for either the #1 or the #3 cylinder. You can look at the distributor rotor or at the valves to figure out which.
When a cylinder is at TDC, both valves for that cylinder will be closed. They'll have some slack, and you should be able to move them side-to-side. (Unless the springs on the rocker shaft have been replaced with solid spacers.) Adjust that one cylinder only at that point. Then you turn the crank 180 degrees to put another cylinder at TDC, and adjust both valves for that cylinder. Then turn the crank another 180, do another cylinder, and another 180 and the last cylinder. You don't do multiple cylinders at the same time with this method. --DD |
Lo-Fi Version | Time is now: 31st May 2024 - 11:07 PM |
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 ... |