 too much crank case pressure...., how can you tell? |
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| jr91472 |
  Jul 8 2005, 02:50 PM
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"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) |
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| echocanyons |
Jul 9 2005, 05:57 PM
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Advanced Member Group: Benefactors Posts: 2,107 Joined: 24-December 02 From: Bay Area, CA Member No.: 7 Region Association: Central California 
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JR,
Could you explain exactly the findings that you are finding and what has lead you to believe it is the rear main seal leaking? I am having trouble with an oil leak that may or may not be coming from the rear main seal, I too have recently changed this seal twice trying to stop the leak. I am now not too sure that the rear main seal was the source of my leak for the following reasons (which may be totally wrong): No oil or oil residue on the clutch and just a tiny amount of near the seal before the first seal change, none on the following . There is however gobs of oil in the bellhousing and after driving the car it appeared to be leaking out of the trans "window" on the underside of the bellhousing. There was no other apparent large source on the top/frontside of the engine. So drained and gave the trans oil the sniff test and it really didnt smell like trans oil so I changed the mainshaft seal on the trans. I still havent started iti after this replacing this seal becasue I now have a stripped exhaust stud from installing and removing the H/E's Hopefully you are able to remedy this problem, if you do please post your methods and experiences. |
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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 jr91472 Thanks for all the replies people... I really appr... Jul 9 2005, 04:12 PM Dr. Roger Oh, and if I may add another $.01 here....
W... Jul 9 2005, 04:56 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 |
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