 too much crank case pressure...., how can you tell? |
|
|
|
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. |
|
|
| jr91472 |
  Jul 8 2005, 02:50 PM
Post
#1
|
|
"I'm pacing myself sergeant..."  Group: Members Posts: 1,205 Joined: 2-August 04 From: McKinney, TX Member No.: 2,437  |
So a little history. I am struggling with a rear main seal that doesn't want to stop leaking oil (sounds like I am not the only one).
I am down to two possibilities (that I know of) 1. excessive wear on the flywheel hub 2. excessive case pressure Focusing on #2, how can you determine if there is too much pressure? One mechanic told me that one test is to simply place the oil filler cap on the oil fill neck (without tighting) while the car is idling. If the cap blows off = too much pressure. Anyone heard of this? Ultimately, what is the cause of excessive case pressure? and how do you fix it? sorry for all the newbie questions, but these things keep me awake at nite...... (IMG:http://www.914world.com/bbs2/html/emoticons/beer.gif) |
   |
 
|
  |
Replies
| jr91472 |
Jul 9 2005, 04:12 PM
Post
#2
|
|
"I'm pacing myself sergeant..." Group: Members Posts: 1,205 Joined: 2-August 04 From: McKinney, TX Member No.: 2,437 |
Thanks for all the replies people... I really appreciated it.
I performed the dipstick test and only found a "little air". In fact it almost felt like a slight vaccum. That's a relief cause I really felt my engine has been running good and strong. BTW, I have aftermarket carbs and the outlet of the oil filler neck has a hose connected to a small air cleaner (IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif) So, I guess I will move on to the flywheel scenario. While I have replaced this seal twice, I have never bothered to "polish" the flywheel hub. So, live and learn I guess. I am going to let it leak for a week or so before pulling the tranny......again. So far, my clutch disk doesn't seem any worse for it. Gonna need a new one soon anyway. later folks, you guys rock (IMG:http://www.914world.com/bbs2/html/emoticons/beer.gif) |
|
|
|
Posts in this topic
jr91472 too much crank case pressure.... Jul 8 2005, 02:50 PM
olav Doesn't crank case pressure increase with RPMs... Jul 8 2005, 03:20 PM Jakester I'm far from the resident engine guru around h... Jul 8 2005, 03:31 PM bondo Something as simple as a stuck PCV valve can cause... Jul 8 2005, 03:34 PM jr91472 Jul 9 2005, 09:06 AM Bleyseng sure, take off the oil breather/filler and inspect... Jul 9 2005, 10:09 AM jr91472 <... Jul 9 2005, 10:30 AM jr91472 duh..... http://www.914world.c... Jul 9 2005, 10:53 AM Mueller all motors are going to have crankcase pressure, f... Jul 9 2005, 11:10 AM Dr. Roger Hey JR,
Here's the quick and easy way to see ... Jul 9 2005, 12:55 PM dmenche914 I really seal for you man. that is a bad problem,... Jul 9 2005, 02:29 PM Dr. Roger Oh, and if I may add another $.01 here....
W... Jul 9 2005, 04:56 PM echocanyons JR,
Could you explain exactly the findings that yo... Jul 9 2005, 05:57 PM jr91472 Basically, the oil is localized to the bell housin... Jul 10 2005, 06:29 PM
scotty b While you're in there check the mating surface... Jul 10 2005, 06:34 PM |
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 6th July 2025 - 08:01 PM |
Invision Power Board
v9.1.4 © 2025 IPS, Inc.