 Stumped, Low Compression |
|
|
|
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. |
|
|
| AKJammer |
 Sep 7 2016, 09:04 PM
Post
#1
|
|
Newbie  Group: Members Posts: 6 Joined: 19-July 15 From: Alaska Member No.: 18,971 Region Association: Pacific Northwest  |
Engine: 1.8 1974.
I tore down the engine to replace Dead gaskets and seals. Purchased new jugs and pistons reassembled the engine. Fired it up and have 90 lbs of compression on 3-4 125 on 1-2. Completed a leak down test and all is good as it is holding what compression there is... Tore the engine down again and measured the cc of the heads and they are all the same. Part number 021.101.371S on both heads. Measured the deck height of the pistons at TDC and they are all the same.... Head gasket shims are all the same. What am I missing??? Thanks Jammer! |
   |
 
|
  |
Replies
| old dog |
Sep 9 2016, 08:54 PM
Post
#2
|
|
Member Group: Members Posts: 63 Joined: 14-December 12 From: Oxnard,CA. Member No.: 15,257 Region Association: Central California |
Just a thought.... Is the cam timing correct ? Good leakdown, different compression side to side.... Cams not timed properly
Again, just a thought. |
|
|
|
Posts in this topic
AKJammer Stumped Sep 7 2016, 09:04 PM
rgalla9146 Fuel injection or carbs ?
If carbs, were the ca... Sep 7 2016, 09:14 PM
AKJammer
Fuel injection or carbs ?
If carbs, were the c... Sep 7 2016, 09:19 PM rgalla9146
Fuel injection or carbs ?
If carbs, were the ... Sep 8 2016, 05:42 AM Root_Werks
[quote name='AKJammer' post='2395384' date='Sep 7... Sep 8 2016, 12:15 PM AKJammer
[quote name='AKJammer' post='2395384' date='Sep ... Sep 8 2016, 01:07 PM injunmort ring gap, ring stagger, valve seats, valve clearan... Sep 7 2016, 10:29 PM AKJammer
ring gap, ring stagger, valve seats, valve cleara... Sep 7 2016, 10:46 PM wndsrfr
ring gap, ring stagger, valve seats, valve clear... Sep 8 2016, 05:27 AM stugray
Rings haven't seated.....drive it like you st... Sep 8 2016, 05:49 AM The Cabinetmaker Sounds like an aka problem Sep 8 2016, 06:00 AM Vacca Rabite Compression on a fresh top end-er builds as the ri... Sep 8 2016, 07:57 AM injunmort if it were mine and it is out and apart. i would d... Sep 8 2016, 07:58 AM AKJammer Thanks All! I have some Ideas of what to do n... Sep 8 2016, 12:10 PM r_towle You may want to check to make sure the case is fla... Sep 8 2016, 07:05 PM Root_Werks Also noting you stated 3-4 "side" doesn... Sep 9 2016, 10:18 AM rgalla9146
Just a thought.... Is the cam timing correct ? Go... Sep 10 2016, 04:03 AM |
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 9th May 2025 - 12:25 PM |
Invision Power Board
v9.1.4 © 2025 IPS, Inc.