HI. We have a 1986 Honda 1500, with a weber 36 dcd carb. The head was skimmed twice, but that are the only mods to the motor. When we changed the sparkplugs on Sunday we noticed that cyl #2 plug was stuck and couldn't be turned out. So with a little brute force and some wynn's rusted lubbe, we manage to loosen the plug only to discover that the first part of the the thread of the plug, closests to the elctrode was "messed up", but the other half was fine. So we took another plug, turned it in and out and the same part of the thread was missed threaded, so we turned the plug in again, this time a little bit easier, until it tightend as it normally would. SO do you think the plug will hold with half of its thread bad and the other half good? any help on what to do would be appreciated. so far the car runs fine, with no misses or hesitation. We don't boost the car.

Thanks.

 

I guess thats the reason they recommend using anti seize on aluminum heads. Not that very many people do anyways. I don't know if I would trust it myself. You didn't try a thread chaser or anything to clean it up? I would probably be inclined to take the head off and have someone fix it. Then again I am lazy, so I would just wait for the spark plug to shoot out before I fixed it and just hope that never happens.

 

Don't ever use anti seize on spark plugs for Hondas. The plugs have a crush washer, you're not suppose to use it. Applying anti seize means you'll have to increase the torque spec by 10%..