Forums

Topic: gas in the crank case  (Read 4151 times)

Offline travisyoung

gas in the crank case

« on: April 01, 2011, 08:14:35 PM »
I has gas in my oil, filled the engine up.  rebuilt the card and replaced the fuel pump,  thouht it was coming from the fuel pump because the bottom of the pump was wet,  started it up, forgot about it and went back a week later and the engine was full of gas again( i had changed the oil also), the left rear tire goes flat overnight so it had sat like that, but i did not think this would make a difference, just wondering if anyone had any tips to check what is leaking

Offline attack chicken

  • Ooltewah
  • Joined: May 2007
  • Posts: 421

Re: gas in the crank case

« Reply #1 on: April 01, 2011, 11:35:42 PM »
Make sure the gas tank is vented.  If the tank is not vented, on a warm day there will be enough pressure in the fuel  system to overpower the valve in the carb and fill the crankcase by dripping gas into the intake and around the rings.

Offline Roadkill

  • Ooltewah Tn.
  • Joined: Nov 2007
  • Posts: 481

Re: gas in the crank case

« Reply #2 on: April 02, 2011, 12:10:17 AM »
sounds like what mine did. See a past post of my beetle dyeing. I towed to R&M and Rick worked his magic and it ran fine and no other problems like this.

Offline Zen

  • Show Chairman
  • Club Member
  • LaFayette, GA
  • Joined: Dec 2001
  • Posts: 8842
  • Liked: 2 times

Re: gas in the crank case

« Reply #3 on: April 02, 2011, 09:15:27 AM »
Just because you bought a new fuel pump, don't assume it's good.  The last time I needed one I bought 3 new ones before I got a good one.  The first one was bad right out of the box (pumped, but leaked gas in the crankcase).  I took it back and got a replacement and about a week later the piviot pin fell out of it.  The third one finally worked.  Quality Control, espcially in South America and the Far East, isn't what it should be.

Offline Ret.Bugtech

Re: gas in the crank case

« Reply #4 on: April 02, 2011, 09:50:49 AM »
Just because you bought a new fuel pump, don't assume it's good.  The last time I needed one I bought 3 new ones before I got a good one.  The first one was bad right out of the box (pumped, but leaked gas in the crankcase).  I took it back and got a replacement and about a week later the piviot pin fell out of it.  The third one finally worked.  Quality Control, espcially in South America and the Far East, isn't what it should be.
Zen you beat me to the pump thing .     I have seen a lot of the NEW neetle and seat in carb kits bad.  Most of the time I use the original over if its intact.

Offline certdubtech

  • In the Garage...
  • Joined: May 2006
  • Posts: 3199

Re: gas in the crank case

« Reply #5 on: April 02, 2011, 10:38:05 AM »
Just because you bought a new fuel pump, don't assume it's good.  The last time I needed one I bought 3 new ones before I got a good one.  The first one was bad right out of the box (pumped, but leaked gas in the crankcase).  I took it back and got a replacement and about a week later the piviot pin fell out of it.  The third one finally worked.  Quality Control, espcially in South America and the Far East, isn't what it should be.
Zen you beat me to the pump thing .     I have seen a lot of the NEW neetle and seat in carb kits bad.  Most of the time I use the original over if its intact.

I almost always re-use the original valve for the same reason. 

Offline volksnick

  • Secretary
  • Club Member
  • Chattanooga
  • Joined: Apr 2009
  • Posts: 4304

Re: gas in the crank case

« Reply #6 on: April 02, 2011, 07:39:40 PM »
I almost always re-use the original valve for the same reason. 

Last time I tried to reuse valves, I caught a lot of flak....

Offline certdubtech

  • In the Garage...
  • Joined: May 2006
  • Posts: 3199

Re: gas in the crank case

« Reply #7 on: April 03, 2011, 12:03:30 PM »
I almost always re-use the original valve for the same reason. 

Last time I tried to reuse valves, I caught a lot of flak....

TOTALLY different kinda valves.  And, no... you can't interchange them.   :P


There was an error while liking
Liking...

About Us

Chattanooga's oldest and largest club for air-cooled and water-cooled Volkswagens, since 1998. Join Us

Follow Us

© 1998-2025 Scenic City Volks Folks