im replacing the exhaust on my 90 pickup 22re and was wondering if anyone knows what the size of the 3 bolts are that bolt the exhaust pipe to the exhaust manifold? also the bolts for the o2 sensor?

Any help is appreciated ive searched around but no one ever seems to mention the bolts (that i saw anyways.)
Thanks

 

12 or 13MM...unless someone swapped out the metric for SAE...best bet is to just crawl under there with your socket set and find one that fits....also might wanna squirt some penetrating oil and let it sit for a bit...they like to be stubborn

 

thanks for the reply, the head is a 17mm, what I was looking for though was what to replace them with, figured id ask before i attempted taking them out in case they did break, which is very likely!

oh and ive been letting wd-40 soak them for a few days now

 

Factory should be 14mm heads. I have successfully replaced them with bolts/nuts from Hope Depot/Lowes/etc with larger head sizes (17mm). I use
1.25 x 30mm bolts.
Oh and I believe the bolt width is 10mm.