Threadlocker

[max-it-out]

I`ve just re-set the needles in my Stromberg carbs , using the small brass screws , but they ( the screws ) seem a bit of a loose fit , and I definitely don`t want them to come loose . I noticed they had a slight coating of a black resin material that I mistakenly cleaned off , thinking it was just crud / dirt , but now realise it was doing a useful job of keeping the screws tight
What is the best stuff to use here ? I don`t want to glue the screws in permanently , just make them more difficult to unscrew . Thanks .

[Series1 Stu]

Hi

I would use Loctite 222, which is a low strength thread lock. It should hold them nicely but break open with ease if you need to remove them again.

The correct way to apply it is to put it in the female thread, not on the male. This ensures the adhesive stays in the thread and doesn't get pushed out. It's an anaerobic curing material so needs to be internal.

Don't over-apply it. 2 drops is enough.

Regards

[abowie]

I would not use anything.

The grub screw in the piston is pretty strong, and the last thing you want is to get Loctite on the base of the needle. They're hard enough to get out without damage at the best of times.

[max-it-out]

Good idea . If I could find some more of the black resin stuff I would use it ( it`s an ex US car , so maybe the stuff is not available in the UK ) , but I definitely don`t want to risk gluing the needles in to the base of the piston/air valve .

[Series1 Stu]

In that case you'd be better off buying new screws, which should come with whatever the substance is already applied.

Regards

[max-it-out]

Yes , that might be best because the screw heads are badly worn , Thanks