oil pick up tube issues take a look.

I've read it and I wanted to make sure if I dare to turn it more than half a turn after it no longer turns with my hands. I'm afraid the threads will come loose.

You want ZERO leakage there.
Not sure anyone can tell you just how much or how far you will be able to twist them in.
IMO, a used tube has already been stressed and likely fit differently in another block. It may well take another turn. The quality of even a new China aftermarket tube may or may not take that stress and crack. It's a crap shoot.
If you're uncomfortable with adding a bit of thread, a quality hydraulic thread sealant (not tape) may be an option. You would likely need heat to remove it later though.
NO LEAK!

Thanks for giving me faith I took the pipe wrenches and twisted it all the way in. It was really tight.

Stock type pickup clearance is now 1/4 inch. from pickup lowest point. i have read that 1/4-3/8 is ok for stock type also, but Is it measured from the lowest point or from the sieve? Thanks for helping

JukkaJ said:

I've read it and I wanted to make sure if I dare to turn it more than half a turn after it no longer turns with my hands. I'm afraid the threads will come loose.

Click to expand...

your being overly cautious , Ive tuned them over 1 turn when I guilt my own...jfyi