 Valves need adjustment? |
|
|
|
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. |
|
|
  |
| Mikemo44 |
 Sep 1 2024, 04:14 PM
Post
#1
|
|
Newbie  Group: Members Posts: 4 Joined: 26-August 23 From: Chicago Member No.: 27,543 Region Association: None  |
Hi All, Long story short, I bought a 914 with two turbos strapped to the back and a Holley EFI installed. It never ran well so I decided ditch the turbos and try carbs. Prior to installing the carbs, I took a shot at adjusting the valves as I thought that might be contributing the car running rough.
Now with the carbs installed, it seems the valves in cylinder 2 are off. Lots of knocking and exhaust coming out of the cylinder 2 carbs. Is this a valve adjustment issue? Or something else like timing? Much appreciate the help. https://www.youtube.com/watch?v=tzSmoiLO8mc |
   |
 
|
| technicalninja |
Sep 1 2024, 04:39 PM
Post
#2
|
|
Advanced Member Group: Members Posts: 2,531 Joined: 31-January 23 From: Granbury Texas Member No.: 27,135 Region Association: Southwest Region 
|
Compression test.
Leak down if trouble seen in comp test. Possibly correct valve adjustment??? recheck comp/leak down tests You have what looks like intake valve not seating correctly on cyl #2 to me. My money is on wounded engine, but you might get lucky... I'd LOVE to see the twin turbo set up on that. It would need tiny little turbos. 4 head bolt air cooled design is less than ideal with boost, but a mild system done perfectly might do OK. Two baby turbos would be interesting... |
|
|
|
| emerygt350 |
Sep 1 2024, 04:48 PM
Post
#3
|
|
Advanced Member Group: Members Posts: 2,884 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
I would love to see it too, but a dropped seat in cylinder 3 might be what you are looking at.
|
|
|
|
| 930cabman |
Sep 1 2024, 05:30 PM
Post
#4
|
|
Advanced Member Group: Members Posts: 4,070 Joined: 12-November 20 From: Buffalo Member No.: 24,877 Region Association: North East States
|
(IMG:style_emoticons/default/welcome.png)
Hate to say, but she doesn't sound good. Keep us updated with your progress. |
|
|
|
| JamesM |
Sep 1 2024, 06:43 PM
Post
#5
|
|
Advanced Member Group: Members Posts: 2,082 Joined: 6-April 06 From: Kearns, UT Member No.: 5,834 Region Association: Intermountain Region |
|
|
|
|
| cgnj |
Sep 1 2024, 09:55 PM
Post
#6
|
|
Senior Member Group: Members Posts: 665 Joined: 6-March 03 From: Medford, NJ Member No.: 403 Region Association: None
|
Lazy man's way.
Leak down. It will tell you what your next steps are. I'd like to see more of the turbo setup. Looking for more waays to keep my car off the road and on the lift. |
|
|
|
| emerygt350 |
Sep 2 2024, 05:25 AM
Post
#7
|
|
Advanced Member Group: Members Posts: 2,884 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
A quick snoop with an boro/endoscope after the compression test if you have one might be good. Actually if it were me, I would do that first.
|
|
|
|
| Mikemo44 |
Sep 2 2024, 09:43 AM
Post
#8
|
|
Newbie Group: Members Posts: 4 Joined: 26-August 23 From: Chicago Member No.: 27,543 Region Association: None |
Thanks, all. I will run some tests next weekend before dropping the engine. I had the engine out last winter and replaced just about every gasket/seal I could. I'm definitely a novice and didn't pay much attention to the valves and the cylinder heads.
Here is the bring a trailer link to the car I bought. 3rd owner in 3 years...should have figured it was problematic. 914TT |
|
|
|
| burton73 |
Sep 2 2024, 10:04 AM
Post
#9
|
|
Senior member, and old dude Group: Members Posts: 3,823 Joined: 2-January 07 From: Los Angeles Member No.: 7,414 Region Association: Southern California
|
Welcome to 914world ra great place for you to get answers as we have so many guys super knowledgeable on these cars. There's going to be a debate about you having a turbo versus you having carbs or different kind of fuel injection, but I personally would have stayed with the turbos and the holly and got that to work. In the test video on BAT you never really see the guy jamming on it. Did it ever run strong? Best of luck Bob B (IMG:style_emoticons/default/welcome.png) |
|
|
|
| Superhawk996 |
Sep 2 2024, 10:48 AM
Post
#10
|
|
914 Guru Group: Members Posts: 7,031 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch
|
Check your spark plug wire routing. Black wires are a little hard to see in the video but I think you have cyl 1 / 2 side messed up.
Firing order is 1-4-3-2 and rotor rotates clockwise |
 |
|
|
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 9th May 2025 - 11:12 PM |
Invision Power Board
v9.1.4 © 2025 IPS, Inc.