Crashed yesterday and my racerail finally pulled out the motor mount bolt.

Gonna heli-coil it today cuz it's snowing again and I wanna know if I try to double up the helicoil inserts to get a longer thread, will the inserts line up (will the bolt go in easy) or am I just gonna give myself a headache with non-aligned threads.

 

yea you would need to get a longer insert the thread more then likely would not line up

 

****... well knowing me i'm gonna try anyway. I think I have an idea that might work. I'll know in a few hours

 

if you get it perfect it will work but what are the odds ??

think of it like two nuts in a socket except the nuts in a socket can move up and down the helicoil cant

 

did you screy up the first one or what?

 

In some cases if you can its easier and better to just go up one bolt size and retap.....My buddy did that on his 954 when he pulled the threads out of the motor mount...steeped it up to M12 from M10, never had a problem since

 

I guess i answered my own question... I did it!

Here's the deal. I didn't wanna drop my motor so I drilled out the motor mount with the proper bit, then bored out the adjustable motor spacer to allow the helicoil tap to slide through to the motor. Next, tap it as per usual with a few wrenches (it tapped like butter). Next is the helicoil trick; you gotta take an extra motor bolt and shape the tip like a helicoil insert tool, then run your tool with a helicoil on it through the outer portion of the helicoil tool a few times to tighten up the insert around your tool... then carefully install the helicoil and keep a finger on the back of the motor mount so you can feel when the insert comes to the end... now the tricky part. carefully measure where the insert begins in the motor mount (use the slide stick on a vernier caliper) and thread in your second coil to around 2 threads away from the last coil. This leaves a tiny gap between the two. Now bust off the helicoil insert tabs and lightly taper the tip of the motormount bolt (if it's not already tapered). Now install the motor mount bolt. The gap betwen the inserts leaves enough room for the tapered end of the bolt to seemlessly move from one helicoil to the next... this rail is bolted down tighter than ever!

here are some random pics for the hell of it

 

sweet...

 

looking good

 

I just did this as well (sans creating my own tool) and it worked great (left about 1.5-2 threads in between the 2 inserts. Bolt threads in great!

 

Has anyone else tried this?