Thread: Transmission to Engine bolt sizes?

I am looking for the sizes of all the bolts that mount the transmission to the engine on a b13/b14 please and thank you.

Contact Andreas miko, I just brought all of the bolts for a great price & fast shipping

The FSM only gives the length... Four different bolt sizes.

Along the top and front from the transmission side, bolts are 55mm in length. From the engine side where the lower motor mount bolts up to the crossmember, that bolt is the same diameter, but is 65mm long. These two are both the 17mm socket heads.

At the bottom, two bolts, both 14mm socket heads, one is 35mm long (goes in front), the other 45mm long (goes in back), both from the engine side going into the transmission.

If you need the actual diameter and thread pitch, I can get those for you tonight, I still have those bolts out. It isn't clear if you're needing to replace yours or just can't figure out which one is which.


These are only the bolts that mount the trans to the engine, as you asked for. There are a few others that are for that rear crossmember mount that aren't shown in the manual.

Yeah I need sizing because they are being replaced with ARP. In theory I could pull them all out and measure but I am asking to save a step lol. Looking for the ones you just gave length on also looking for the ones that hold the transmission mount bracket to the trans/engine

Ashton has a thread for this I think....

found it. Looks like the trans. bolts are not on that list?

http://www.sr20-forum.com/information-library/69949-sr20de-ve-det-engine-bolt-size-length-thread-pitch-quantity-list.html

why would you replace them with arp? you will never ever snap an oem trans bolt

Never say never, I'm sure someone has. I want to change them because of galvanic corrosion. Have some low grade stainless ones in there now and after only 6 months they are starting to degrade

The housing will let go before the oem bolts will. I will say never because I've never ever seen a documented case of this occurring. Plenty of broken cases and grenaded internals, never the bolts.

Even when flywheels explode the bolts will never break. The material around the bolts will give way first.

I'm sorry, I didn't have a chance to check the specs for those other bolts. I had a few other things get in the way this weekend and I'm going to be out of town for almost 2 weeks starting later today. Maybe someone else can get the measurements if you're still needing them. Sounds though that you definitely have the wrong set of bolts in yours, I've never seen the OEM bolts do anything like that.