 Valve collision problem |
|
|
|
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. |
|
|
| thomasotten |
 Jun 30 2018, 08:03 PM
Post
#1
|
|
Senior Member  Group: Members Posts: 1,544 Joined: 16-November 03 From: San Antonio, Texas Member No.: 1,349  |
I am having a bit of a problem with my latest 2 liter build. Basically, valves are colliding with pistons after warm up during break in. A valve got stuck and the pushrod actually fell off the rocker.
The heads were redon by RIMCO. After the problem happened, I pulled the heads, and there was clear indication of valve collision, and I had a valve stuck open. The head with a problem was sent back to RIMCO. Reinstalled. What happened this time is the engine start up from cold, runs fine. But then I can hear the taping of collision again. The taping is accompanied by a chirping sound that sounds like something is dragging. I think it must be the valves dragging and closing too slow. I have a deck height of .065. This is essentially a stock build, stock camshaft, etc. Any ideas? Is this perhaps a valve stem lubrication issue? |
   |
 
|
Posts in this topic
thomasotten Valve collision problem Jun 30 2018, 08:03 PM
thelogo
I am having a bit of a problem with my latest 2 l... Jun 30 2018, 09:58 PM
Mueller
I thought if the valve gets stuck or struck th... Jul 1 2018, 10:50 AM euro911 Deck height at the top of the barrels is one thing... Jul 1 2018, 04:29 AM bdstone914
I am having a bit of a problem with my latest 2 l... Jul 1 2018, 07:35 AM thomasotten Basically a stock build. But with 96mm
Pistons w... Jul 1 2018, 07:48 AM thomasotten Stuck intake valve Jul 1 2018, 07:49 AM Mark Henry
Stuck intake valve
I often see this when a seat... Jul 1 2018, 08:35 AM Mark Henry
Stuck intake valve
I often see this when a sea... Jul 1 2018, 09:30 AM Bartlett 914 Once the valve is bent, it is going to stick. Mayb... Jul 1 2018, 08:20 AM Mark Henry Possible causes:
Guides not sized/reamed/honed c... Jul 1 2018, 08:31 AM r_towle pistons put in upside down? Jul 1 2018, 10:52 AM thomasotten Photo of the stuck valve. When this happened to
... Jul 1 2018, 11:21 AM thelogo
Photo of the stuck valve. When this happened to ... Jul 1 2018, 02:50 PM sixnotfour top end oiling problem ?? no lube Jul 1 2018, 12:17 PM Mark Henry I'd check the clearance of the guides, most sh... Jul 1 2018, 02:33 PM Mark Henry Maybe you should get your injectors checked/cleane... Jul 1 2018, 02:36 PM thomasotten
Maybe you should get your injectors checked/clean... Jul 1 2018, 04:26 PM thomasotten So, after sitting on the workbench for a few hours... Jul 1 2018, 05:01 PM rgalla9146 Most likely issue is the guides are too tight. Jul 1 2018, 05:05 PM thomasotten Brass shaving found mid stem Jul 1 2018, 05:11 PM thomasotten It is hard to make a good photo of this, but looki... Jul 1 2018, 05:18 PM Elliot Cannon Next time, send them here. :D http://www.europe... Jul 1 2018, 05:21 PM bulitt They used the wrong size reamer ?
Roll that valve ... Jul 1 2018, 06:14 PM Mark Henry Hard to see, but definitely tight and a poor job. ... Jul 1 2018, 07:41 PM reharvey I had this exact same problem once and it was the ... Jul 2 2018, 06:13 AM thomasotten I won't be posting more about this until I hav... Jul 17 2018, 10:42 AM  |
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 28th April 2024 - 09:26 AM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.