I can't get the Spray Nozzle out of an NH. Can any one help? If I use heat, how much is needed? Red hot? Thanks!
Hello after I get it hot I always pour some Motor oil down The hole and then wait till it cools down usually turns right out
Thanks again Bill
Thanks Bill, I'll try heat with KrolOil. The grooves for the screwdriver are still OK. Our Club is working on assembling a Touring to be raffled with proceeds going to The Society For The Blind. I'm hoping to get the engine running like it should.
heat...and then dump in KrolOil...
Yes heat then put in oil
Really no need for oil. Heat casting HOT and quench in water
Or just let it "air" cool down. Burning out the old gasket is what I think does the trick. Quenching could cause it to crack. I just heat them, let them cool, and then use a screw driver that is a perfect fit to the slot in the nozzle. You may have to custom grind one, but it is worth the extra effort.
I've done lots of carbs and yet to have one crack
There isn't a need to quench (but it likely won't hurt anything either). What happens Hal is when you heat the carb body and the offending brass piece red is this. The brass tries to expand but isn't able as the cast iron being more dimensionally stable prevents it from growing. Now, we all know things shrink as they cool and since brass has a different rate of expansion it also will contract at a different rate. The offending item will shrink and pull away from the cast iron breaking the bond. I never fool with taking a carb apart without going straight for heat. The clubs book on carbs that states to use WD40 is just a cruel joke played on many. WD40 is ok as a cleaner and for displacing water, nothing else.
Heat then water. Immediate results. No waiting.
Don't get it red hot, just glowing or even just good and hot. If you get too hot can melt the brass.
This is not a huge problem. First mount it upside down in a vice. Heat the stalk with a propane torch. I've never had to get it anywhere near glowing at all. My "trick" if you will is get it hot then drip a few drops of water straight down the hole onto the brass nozzle and screw it out. The shock/shrink of the water works wonders. Your biggest must is a tool (ground screwdriver, flat stock, whatever) that fits the slot in the nozzle EXACTLY.
Thanks for the help!!! I bought a new screwdriver that just fits. I'll give it a shot tomorrow. That expansion/ contraction theory sounds good.