leak down question

[nelson edens]

I just performed a leak down on a stock 300 Drag with about 40 hours.
(Single ring pistons)

All test done clockwise.

The 1/3/5 side had 10-13% leak down.

The 2/4/6 side had 2-3% leak down.

Anybody had this same experience?

[catfish123]

Yes sir.............................do the starboard side while pulling against the flywheel in a counterclockwise direction and report back on your results. I believe your results will be quite different. Please report back on how you make out on it.

[nelson edens]

I have heard about that. The only problem I have encountered is the flywheel nut un-screws.

[catfish123]

I have heard about that. The only problem I have encountered is the flywheel nut un-screws.
That is the main reason not to use 100psi going in to do the test.

[Chaz]

That is the main reason not to use 100psi going in to do the test.

Then ya gotta hafta know how ta do da maff .. :eek:

https://itsallsatire247.files.wordpress.com/2012/09/jethro.jpg

[speedinstream]

I use a piston stop tool don't have to hold flywheel but yes spin her other way numbers with come down

[speedinstream]

I think motor is probly junk what ya take for it

[tcrabtree]

Use a flywheel holder to turn it counter clockwise , not the nut.