2G Suspension bolt thread size

[RJ_IS_BATMAN]

Hey everyone,

Im currently rebuilding my suspension and need to get 2 replacement bolts but I need the thread size to order the right bolts.

I have the part numbers according to another thread but it doesn’t state the thread size.

I need the following bolts

40388C - M12x60 bolt
40388D - M12x35 bolt
These bolts connect the lower rearward control arm to the frame of the car.

any help would be appreciated

 

[luv2rallye]

I assume you're talking about the compression lower arm assembly (curved arm) on the front suspension. BTW those numbers are the PNC number, not the part number. The real Mitsu part number is the MFxxxxxx:

MF101320 (40388C): M12 x 1.25 x 60
MF101314 (40388D): M12 x 1.25 x 35

And the thread pitch is 1.25, not 1.5. Be very careful when you put them in as they can easily get cross threaded. You'll have to put a floor jack (with wheels to be able to swing left/right slightly) under the arm to take part of the car weight to get them to line up properly or you'll end up cross threading the bolts (and have a very difficult time starting the bolt going straight in). Also make sure you get at least grade 8.8.

 

[FIBA M - EC17PSE]

I assume you're talking about the compression lower arm assembly (curved arm) on the front suspension. BTW those numbers are the PNC number, not the part number. The real Mitsu part number is the MFxxxxxx:

MF101320 (40388C): M12 x 1.25 x 60
MF101314 (40388D): M12 x 1.25 x 35

And the thread pitch is 1.25, not 1.5. Be very careful when you put them in as they can easily get cross threaded. You'll have to put a jack under the arm to take part of the car weight to get them to line up properly or you'll end up cross threading the bolts (and have a very difficult time starting the bolt going straight in). Also make sure you get at least grade 8.8.

My bad i had another thread pitch stuck in my head from a car at work and i was looking at the car while typing this and i think i went into auto mode. Deleting my comment now

 

[javier347]

I assume you're talking about the compression lower arm assembly (curved arm) on the front suspension. BTW those numbers are the PNC number, not the part number. The real Mitsu part number is the MFxxxxxx:

MF101320 (40388C): M12 x 1.25 x 60
MF101314 (40388D): M12 x 1.25 x 35

And the thread pitch is 1.25, not 1.5. Be very careful when you put them in as they can easily get cross threaded. You'll have to put a floor jack (with wheels to be able to swing left/right slightly) under the arm to take part of the car weight to get them to line up properly or you'll end up cross threading the bolts (and have a very difficult time starting the bolt going straight in). Also make sure you get at least grade 8.8.

I made the mistake of cross threading this, what would be the best way to get this fixed?

 

[BLACK'98DSM]

I made the mistake of cross threading this, what would be the best way to get this fixed?

Did it damage the subframe or the bolt? Or both?

 

[javier347]

Did it damage the subframe or the bolt? Or both?

It damaged both, I bought a HELICOIL kit but on the edge to do that underneath the car.

 

[Justin DuBois]

It damaged both, I bought a HELICOIL kit but on the edge to do that underneath the car.

First thing - locate a tap, and see if you can clean up the existing threads in chassis. Any idea how deep you crossed it up? Do you have a picture of the offending bolt?

 

[chrysler kid]

Buy a GOOD metric thread tap and dye set. I’ve saved completely butchered turbocharger exhaust housing threads with an $80 tap set. Spending good money for good tools is worth it