 reading engine by piston build up? |
|
|
|
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. |
|
|
| detoxcowboy |
 Apr 21 2009, 08:16 PM
Post
#1
|
|
Senior Member  Group: Members Posts: 1,294 Joined: 30-January 08 Member No.: 8,642 Region Association: Africa  |
I am curious if someone could say why i have a respectable amount of carbon build up on pistons 1 and 4 but not on 2 and 3? Is this a sighn of anything or style of runing condition.. ?? It is the first time i have seen my pistons since purchase last year any info is good info.
|
   |
 
|
  |
Replies
| Katmanken |
Apr 22 2009, 05:47 PM
Post
#2
|
|
You haven't seen me if anybody asks... Group: Members Posts: 4,738 Joined: 14-June 03 From: USA Member No.: 819 Region Association: Upper MidWest |
Hard dry crusty carbon sounds like cooked oil.
Several causes. 1. bad valve guides leaking oil into the cylinder 2. oil rings didn't seat 3. score mark in the cylinder wall? (oil path) 4. Rings not staggered on the piston (all in a line on the bottom of the cylinder provides an oil path) Any smoke on startup or driving? |
|
|
|
Posts in this topic
perrin1097 reading engine by piston build up? Apr 21 2009, 08:16 PM
kwales Oil leaking past the rings? Apr 21 2009, 08:23 PM
perrin1097
Oil leaking past the rings?
o.k. waht if it is ... Apr 21 2009, 08:50 PM r_towle FI or carbs? Apr 21 2009, 08:52 PM perrin1097
FI or carbs?
74 2.0 fi.. It is just the 2 fow... Apr 21 2009, 09:22 PM r_towle It may also be that the injectors are not balanced... Apr 22 2009, 06:33 PM perrin1097
It may also be that the injectors are not balance... Apr 22 2009, 06:49 PM r_towle did you hopefully re-ring the motor???
You might a... Apr 22 2009, 06:51 PM perrin1097
did you hopefully re-ring the motor???
You might ... Apr 22 2009, 07:00 PM r_towle take a very focused, high resolution picture of th... Apr 22 2009, 07:03 PM perrin1097
i can see cross hatching thats all i know.. nothi... Apr 22 2009, 07:22 PM perrin1097 another one.. Apr 22 2009, 07:25 PM perrin1097 RE: reading engine by piston build up? Apr 22 2009, 07:26 PM r_towle When was this motor rebuilt? how many miles?
Your... Apr 22 2009, 07:37 PM perrin1097
When was this motor rebuilt? how many miles?
You... Apr 22 2009, 07:44 PM r_towle http://www.aircooledtechnology.com/store/home.php?... Apr 22 2009, 07:47 PM perrin1097 Perfectly done towle.. why not.. nice lead they ha... Apr 22 2009, 08:01 PM Todd Enlund Those are 2.0 bus pistons... are the rings the sam... Apr 23 2009, 10:50 AM |
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 1st August 2025 - 06:47 PM |
Invision Power Board
v9.1.4 © 2025 IPS, Inc.