![]() |
|
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. |
|
![]() |
JMT |
![]()
Post
#1
|
Newbie ![]() Group: Members Posts: 36 Joined: 19-August 16 From: Ca Member No.: 20,316 Region Association: None ![]() |
Hello everyone. Went for a drive today and car ran great, stopped for fuel and when I started back up I heard a horrible rattle coming from cylinders 3 and 4 valve cover. After a tow home I found this. At least 1/4" gap from rocker to valve tip. I turned the engine over slowly and did get the rocker arm to slightly open valve. I thought how could a solid lifter collapse?
I also pulled the rockers and pushrod. The pushrod was not bent. I looked down the pushrod tube and saw 'C' clips on the lifters. Is there such a thing as solid lifters with 'C' clips? Thank's for the help. ![]() |
![]() ![]() |
Jake Raby |
![]()
Post
#2
|
Engine Surgeon ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States ![]() |
Any of the new heads require better components installed to be trustworthy. This held true with the AMC Spanish made heads, as well as these newer units made in China.
Valves and springs are the biggest question mark, as well as valve seat material, and seat installation. Len stopped rebuilding OE head castings a long time ago. If you buy his heads based on either of the new castings available, he is reworking those in many ways, balancing the chambers, installing proven hardware and etc. Once he's done with them, I'd say that the AMC or China heads are on par with each other. Out of the box from either manufacturer is a crapshoot. The crapshoot associated with OE head castings is even bigger, because over 45 years they've been overheated, hacked on, welded, have stripped threads, and will pull exhaust studs in most cases. Heads do have a service life, even 911 heads. |
![]() ![]() |
![]() |
Lo-Fi Version | Time is now: 16th June 2024 - 11:20 AM |
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 ... |