Maximum Allowable Variance in Deck Height, Stock 2.0 Liter Four |
|
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. |
|
Maximum Allowable Variance in Deck Height, Stock 2.0 Liter Four |
motorvated |
Jan 18 2020, 10:18 AM
Post
#1
|
Member Group: Members Posts: 279 Joined: 13-February 13 From: Colorado Member No.: 15,519 Region Association: Rocky Mountains |
I'm in the process of re-assembling the top end of my stock 2.0 liter four, and I have measured deck heights as follows:
#1 - 0.036 #2 - 0.029 #3 - 0.037 #4 - 0.035 These measurements are with the cylinder base sealing rings in place and the cylinders torqued down snugly and measured with a dial gauge. To me it seems as if I need to add a shim to the bottom of cylinder #2 approx. 0.050 - 0.080 to increase its deck height to within the range of the others. I have a couple of used 0.080 shims, one of which I could add to cylinder #2 to bring it up to 0.037. I have a couple of questions about this. First, how much variance is permissible between the measurements? If the deck heights are all within 0.002 of one another, is that Ok or do they need to be exactly the same. Second, can I re-use one of my 0.080 shims or should I source a new one. And third, do I place the shim on top of the cylinder sealing ring, beneath it, or doesn't it matter. I was planning on putting it on top of the sealing ring. Thanks in advance for your advice. |
914werke |
Jan 22 2020, 04:43 PM
Post
#2
|
"I got blisters on me fingers" Group: Members Posts: 10,062 Joined: 22-March 03 From: USofA Member No.: 453 Region Association: Pacific Northwest |
That's the one I have but it also has a plate that drops in between and is keyed to the half circle cut outs you see on the bars. (IMG:style_emoticons/default/smile.gif) Hmmm I didnt get that ? Mark can you post a pic I might have to make one. |
jsaum |
Jan 24 2020, 06:05 PM
Post
#3
|
Senior Member Group: Members Posts: 530 Joined: 12-June 07 From: Everett, WA Member No.: 7,809 Region Association: None |
That's the one I have but it also has a plate that drops in between and is keyed to the half circle cut outs you see on the bars. (IMG:style_emoticons/default/smile.gif) Hmmm I didnt get that ? Mark can you post a pic I might have to make one. Rich, I have the plate if you want to take a look at it. James |
Lo-Fi Version | Time is now: 16th May 2024 - 06:59 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 ... |