B.Ikard Posted May 28, 2006 Posted May 28, 2006 Gents, This followed me home yesterday.....Magnetron ignition, semi-new carb w/ no water damage, ring gear starter. This was from a welder w/ tapered crankshaft. I noticed a little rear bearing play....unusual but fixable. Engine appeared to have a blown head gasket. Fresh .020 overbore....somebody spent a little $$ on this one not too long ago. And I see my headgasket problem, the result of using too short headbolts-what a shame :(!. Lucky this was the only one- A not so clear pic of the broken flange and cast iron fragement. Can anyone offer any suggestions to the best repair for this block?? Any advice or suggestions would be appreciated, Brent
Marty-MN Posted May 28, 2006 Posted May 28, 2006 I've never had to, but I looks like you could bolt the head on to help keep centerthe drill, set it in the drill press and bore the hole a bit deeeper with a tap size drill and tap the hole deeper with a bottoming tap and use a longer bolt
maxtorman1234 Posted May 28, 2006 Posted May 28, 2006 It dosent look like much of the thread is missing, I think you best fix would be to mix up some jb weld and smooth out the surface, so when you torque it it dosent try to bend the head. Also about the rear bearing play, you should see my other post "interesting briggs problem'
jlasater Posted May 28, 2006 Posted May 28, 2006 I don't know if they use nirod or something, but someone welded up one of the exhaust port flange ears on the 390 in my Ford truck. Might be able to do something similar. Might have even been some sort of heavy duty brazing rod.
Al Posted May 28, 2006 Posted May 28, 2006 Hi, I would take it to a welding specialty shop and have them build it up and then have someone bolt it down in a milling machine and true it up. metal around the exhaust valve will be about .003 high from the heat. Run the piston down and put duct tape around the cylinder and seal it off. (After all the welding, machining and tapping remove the tape and clean the cyl with lacquer thinner or equiv. then oil the cyl) After the repair I would drill the hole out and put a genuine "heli-coil" in it. Should last as good as new. Al Eden
B.Ikard Posted May 29, 2006 Author Posted May 29, 2006 Thanks for the replies ! At this point, I think I will try either a longer bolt or stud. If this engine keeps blowing headgaskets in the future I think I will go with Al's suggestion. Brent
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