 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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| Dr. Roger |
Jul 9 2005, 04:56 PM
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#2
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A bat out of hell. Group: Members Posts: 3,944 Joined: 31-January 05 From: Hercules, California Member No.: 3,533 Region Association: Northern California |
Oh, and if I may add another $.01 here....
When your crank seal surface is exposed, measure the diameter of where the seal comes in contact with the crank. Compare with anothers diameter to ensure everything is apples to apples. Check the seal itself also. I almost made this mistake with small block chevy cranks.. but caught it. |
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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 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 |
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