Parts Master motor mount nut size issue

[Stormwalker]

I am having a slight issue with the motor mounts I chose to go with. Now since I somewhat know what this forum is like, I will have to throw in the disclaimer that I was in a rush to drop the short block in, so I only had time to go get replacement motor mounts from Champion Auto, and not wait 3-7 days on an order of polyurethane bling bling >3eleventy motor mounts.

I cannot seem to find the correct size nuts for these motor mounts. The nuts that came off the old motor mounts do not fit the new ones. I also went to the hardware store and got a fistful of nuts to try, but none of those work either, which leads me to believe that they are an unusual thread pitch or something. I figured I would post this here to see if anyone else has installed "Parts Master" motor mounts in their car, and know anything about what I would need for a nut. Thanks.

 

[mikesmith66]

I am having a slight issue with the motor mounts I chose to go with. Now since I somewhat know what this forum is like, I will have to throw in the disclaimer that I was in a rush to drop the short block in, so I only had time to go get replacement motor mounts from Champion Auto, and not wait 3-7 days on an order of polyurethane bling bling >3eleventy motor mounts.

I cannot seem to find the correct size nuts for these motor mounts. The nuts that came off the old motor mounts do not fit the new ones. I also went to the hardware store and got a fistful of nuts to try, but none of those work either, which leads me to believe that they are an unusual thread pitch or something. I figured I would post this here to see if anyone else has installed "Parts Master" motor mounts in their car, and know anything about what I would need for a nut. Thanks.

I had something like this happen a long time ago on a car I was putting a motor in. He ordered NAPA mounts, and the factory nuts wouldn't fit. The problem was one of 2 things, I just can't recall. Either the thread was different (one was metric thread, the other standard) or the paint NAPA put on the mounts covered the threads so much we had to run a die over the stud to clean the threads off.

Mike

 

[jrichker]

This isn't going to be much help, but I know what you are fighting.

Some of the motor mount nuts are metric and some are US thread. The only way to tell is to either find a nut that fits or use a thread pitch gauge to determine the number of threads per inch.