« previous next »
Pages: [1]   Go Down

Author Topic: Bottom End Leak Down  (Read 3053 times)

0 Members and 1 Guest are viewing this topic.

Offline bob larry

  • Full Member
  • ***
  • Posts: 150
Bottom End Leak Down
« on: May 04, 2010, 07:36:51 AM »
Hey guys,

My top end is out getting a new life........If I put a plate across the top end opening ( with the gauge and valve installed into the plate) couldn't I leak and vaccum test the bottom end to see
if I need to tear it all apart?

The gauge came in the mail and I have the stuff to make it after my rebuild.....but I am bored waiting for the jug to come back.

With a good plate over the top end it should hold 6 psi for a long time.......no.?

Let me know what you think


 :mrgreen:
Logged
2001 KX500

Offline DoldGuy

  • Hero Member
  • *****
  • Posts: 1,198
Re: Bottom End Leak Down
« Reply #1 on: May 04, 2010, 07:47:26 AM »
Bob,
If you make the plate to seal, then yes you can test it that way. And it should hold 6 psi for at least 10 minutes.
Also make sure you do a test after the motor is together to confirm everything up top is sealed too (mine had a leak thru the power valve seal)
Keep us posted on your findings!
DoldGuy
Logged
Its Never too Late to Have a Happy Childhood!

Offline dave916

  • Hero Member
  • *****
  • Posts: 546
Re: Bottom End Leak Down
« Reply #2 on: May 04, 2010, 08:39:27 AM »
is the conrod going to make that test a little awkard?? 
Logged

Offline DoldGuy

  • Hero Member
  • *****
  • Posts: 1,198
Re: Bottom End Leak Down
« Reply #3 on: May 04, 2010, 08:43:51 AM »
Quote from: dave916 on May 04, 2010, 08:39:27 AM
is the conrod going to make that test a little awkard?? 


Yup!
Logged
Its Never too Late to Have a Happy Childhood!

Offline bob larry

  • Full Member
  • ***
  • Posts: 150
Re: Bottom End Leak Down
« Reply #4 on: May 04, 2010, 08:53:48 AM »
Good Call.... :-o

Would be a messy silcon battle to seal around the rod.

The seal kit came in so I'll just tear it down.
Logged
2001 KX500

Offline DoldGuy

  • Hero Member
  • *****
  • Posts: 1,198
Re: Bottom End Leak Down
« Reply #5 on: May 04, 2010, 09:08:19 AM »
Quote from: bob larry on May 04, 2010, 08:53:48 AM
Good Call.... :-o

Would be a messy silcon battle to seal around the rod.

The seal kit came in so I'll just tear it down.


And that's the Best Call! :-D
Logged
Its Never too Late to Have a Happy Childhood!

Offline Speedway73

  • Full Member
  • ***
  • Posts: 94
Re: Bottom End Leak Down
« Reply #6 on: May 04, 2010, 02:47:42 PM »
Not if you made a "Top Hat" type plate. :)
Logged

Offline Goat

  • Hero Member
  • *****
  • Posts: 785
  • Ride it like you stole it!
Re: Bottom End Leak Down
« Reply #7 on: May 04, 2010, 02:50:42 PM »
If you have the parts and waiting on the jug you might as well just do it while it's down. Let me know if you have any questions.
Logged
Quote from: Danger4u2 on June 17, 2010, 01:36:16 AM
It's hard to keep a drivers license riding a 2 stroke dirt bike on the street.  If you drive within the law they are VERY boring.

Offline bob larry

  • Full Member
  • ***
  • Posts: 150
Re: Bottom End Leak Down
« Reply #8 on: May 05, 2010, 01:25:09 AM »
Quote from: Speedway73 on May 04, 2010, 02:47:42 PM
Not if you made a "Top Hat" type plate. :)

Was looking at it last night and ya when at BDC you would only need a 2" dome or top hat..lol
Would save a lot of work if it is all air tight.
Maybe I'll widdle one out of wood. :mrgreen:
Logged
2001 KX500

Offline bob larry

  • Full Member
  • ***
  • Posts: 150
Re: Bottom End Leak Down
« Reply #9 on: May 13, 2010, 06:29:42 AM »
Since the bottom end with a cap on it, is sealed tight it should hold the vaccum pressure for a long time ... no ..?

http://
Logged
2001 KX500
Pages: [1]   Go Up
« previous next »