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seized up idle screws on weber 500
Posted: Mon Feb 05, 2007 4:31 pm
by ppyvabw
One of my idle screws seized up. I have managed to free it up with a bit of WD 40. It brought out a tiny bit of the aluminium thread out with it tho, about half of 2 threads if that makes sense. cleaned the threads and it screws back in fine, not damaged.
If this happens again and im not so fortunate can they be helicoiled because they are only small?
Posted: Mon Feb 05, 2007 5:38 pm
by sidecar
I presume that you are talking about the mixture screws not the actual idle stop-screw, if so I'm sure that it can be repaired one way or another if all the threads strip.
The old fasioned way (which in some ways is better than helicoils) is to drill and tap the hole out to a larger size, then screw in a piece of threaded brass which should be fixed with locite. A hole of the correct size is then drilled and tapped into the centre of the brass.
Any decent engineering workshop could do this for you.
By the way you could try fitted a lighter spring on the idle mixture screw so that the remaining threads are under less strain.
Regards,
Pete
Posted: Mon Feb 05, 2007 7:29 pm
by ppyvabw
nah, the remaining threads look fine, its just me being paranoid about my 250+ quid carburetor.
Posted: Tue Feb 06, 2007 3:21 pm
by noddy306
put some copper slip on the threads, that should stop the steel screw siezing in the ally threads