Bottom End Leak Down

[bob larry]

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


 

[DoldGuy]

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

[dave916]

is the conrod going to make that test a little awkard?? 

[DoldGuy]

is the conrod going to make that test a little awkard?? 

Yup!

[bob larry]

Good Call....

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

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

[DoldGuy]

Good Call....

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!

[Speedway73]

Not if you made a "Top Hat" type plate.

[Goat]

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.

[bob larry]

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.

[bob larry]

Since the bottom end with a cap on it, is sealed tight it should hold the vaccum pressure for a long time ... no ..?

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