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 )

> timing and time again, timing question
doobie123
post Feb 16 2023, 06:10 PM
Post #1


Member
**

Group: Members
Posts: 86
Joined: 8-July 22
From: tucson
Member No.: 26,683
Region Association: Southwest Region



hi ya'll

let me just say up front, i'm pretty new to this so if my questions seem obvious, sorry
so i'm working on a 75 with a 2.0 and 5 spd. i have the engine and trans out to do the clutch and cleanup the bay etc. before i put everything back i want to set the valves.
i brought #1 piston to TDC. i did this with the use of a scope and since the engine is out, i can see the piston. when i did this, i took the cap off the distributor, and to my untrained eye, it looks like it's 180 degrees out but, i'm not sure because, well, i'm green. so my question is, is it 180 out? if so, can i just pull the distributor and rotate it where it need to be? if so, am i moving the line on the case to match the rotor or the rotor to match the line?
i guess i should also say, i bought a non running car. i had it running before pulling the drive train but just for a bit and only drove it up and down the block so i really don't know the history.
thanks for any help


Attached thumbnail(s)
Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
 
Reply to this topicStart new topic
Replies
Jack Standz
post Feb 16 2023, 09:27 PM
Post #2


Member
**

Group: Members
Posts: 433
Joined: 15-November 19
From: Happy Place (& surrounding area)
Member No.: 23,644
Region Association: None



"i brought #1 piston to TDC. i did this with the use of a scope"

The piston will be at TDC twice during its 4-stroke cyle. As already mentioned, it looks like you're on the wrong stroke for TDC on the #1 piston's compression stroke.

Use the timing mark on the fan (if it's not there, put a mark at TDC for #1 piston on its compression stroke) by unscrewing the plastic plug in the fan housing or some flywheels have it marked so it shows as TDC when the "0" mark is even with parting line at the top case.

When you have the motor at TDC #1 on compression stroke, the distributor rotor should be pointing at that mark on the distributor rim. If not, take steps to align your distributor like the drawing posted above.

Best wishes with the new-to-you 914!
User is offlineProfile CardPM
Go to the top of the page
+Quote Post

Posts in this topic


Reply to this topicStart new topic
2 User(s) are reading this topic (2 Guests and 0 Anonymous Users)
0 Members:

 



- Lo-Fi Version Time is now: 15th January 2025 - 04:06 AM