Ohwheelhorse 121 #1 Posted June 11, 2016 Picked up a 854 with a 8 hp Kohler. I got it home and bumped in the muffler and it fell off. Someone had JB welded it to the block. The threads were shot. Is there any fix to this besides a new block? I don't want to put money into this motor If it's not fixable. Share this post Link to post Share on other sites
Ed Kennell 35,146 #2 Posted June 11, 2016 Can you borrow a tap from your plumber and rethread the hole a little deeper? 1 Share this post Link to post Share on other sites
N3PUY 1,031 #3 Posted June 11, 2016 The threads are usually just full of carbon. Share this post Link to post Share on other sites
Ohwheelhorse 121 #4 Posted June 11, 2016 It looks like someone has already unsuccessfully tapped it Share this post Link to post Share on other sites
squonk 38,569 #5 Posted June 11, 2016 If the block is un-threadable a good experienced welder should be able to weld in a pipe nipple. Not the best way to do it but better than throwing an otherwise good block away. 5 Share this post Link to post Share on other sites
953 nut 51,019 #6 Posted June 11, 2016 Another option would be to clean the port up, silver solder (aka hard solder) the threaded area and then tap it. An AC service person or a welder could do this if you are unfamiliar with it, not much different than brazing but a bunch stronger. 3 Share this post Link to post Share on other sites
ACman 7,423 #7 Posted June 11, 2016 48 minutes ago, 953 nut said: Another option would be to clean the port up, silver solder (aka hard solder) the threaded area and then tap it. An AC service person or a welder could do this if you are unfamiliar with it, not much different than brazing but a bunch stronger. !!! Thanks for the idea. Before my accident,I was the one they called on when weren't going right . One guy blew a dime size hole on the line set , right at the valve on the outside unit. It's all about controlling your heat , and knowing when to add the solder . Doing all this while tucked up with you head stuck to the ground . Pinned between the house and AC unit. ( fellow HVAC installers you know what I'm talking about ) . Maybe there is hope for one of my K91's . 4 Share this post Link to post Share on other sites