Mystery Bolt on front crossmember

[Buurin]

Here is a picture of the front suspension crossmember of my Corolla, a gen 8:



The two red circled bolts are not mentioned anywhere in the factory manual, nor are they in Haynes manual either. Right now there's a grade 8 bolt in there. The bolt circled in blue right now is a grade 11 bolt, same as the other crossmember bolts known to be torqued to 167 ft-lbs per factory manual, but it's only spec'd for 109.

But this bolt also bolts to the body, and from the look of it it won't withstand 167 ft-lbs of torque required of other crossmember to body bolts.

I just came back from the local dealer and checked out a 97 Corolla on hoist. There is a similar layout and the back bolt in the red-circled spot is indeed a grade 8. The mechanic says that bolt is torqued to about 52 ft-lbs.

Can anyone confirm? Did I unknowingly switched the two bolts?

PS. Did I pick a good spot to place a jack stand in the pic?

[Flashmn]

They hold up the subframe.

Doesnt look like a good spot, very easy for it to slip. also those frame rails arent meant for jacking up, they crumple easily.

[meicalnissyen]

wow, glad my rolla has lived in hawaii and FL
the jack placement is fine, I have a 6 inch piece of 2x4 ripped in half and I spread the load a bit with that so my stand would be aft 3 inches from there with the wood in between the stand and boddy.

the red bolts can not be swapped, they a re short and go in direct to threads you could fuck up the blue ones if you worked at ti but again they are all slightly different lengths either markem or just pay attention to how much thread engagement you're getting when you go to put em back its really not to bad

DO use that silver antiseize (you'll be back there someday)
DO get good nutbuster juice on that cross bar nut. that is actually a long body bolt with a stud on the head for the brace

the center cross member has a sinole bolt that holds (f'in interferes) with the motor mount/cross member /frame it sux and there is no easy way to get it.
after the second time in threr I modified the ares a good bit and can now remove /replace my rear motor mount WITHOUT loosening the frame or crossmember

[tanoge]

did you find out all torque specs for the crossmember?
I going to attach one and i would like to make sure that i have the correct torque specs. my corolla is a 2002 model
Thanks

[rollatuner110]

I'll have to inspect the same on mine too. I have a rattling problem down there.

[Nad1370]

I think the red bolts are 10mm and the blue ones ar 12mm (thicker bolt). So the lower grade bolt might just take 52ft lbs.
They just have the same 19mm bolt head.