I have an exhaust leak on my 22re engine. Today I took off the insulator and noticed that one of my studs is missing. Anyways, what would be the best course of action to replacing that? Should I replace all the studs on the exhaust manifold? Should I also replace the gasket on the manifold? I'm also missing two studs on my exhaust insulator. I was looking on ToyoDIY for parts numbers and I'm not quite sure which studs I need for the exhaust manifold and insulator; what part number correctly corresponds to the exhaust manifold gasket? Lastly, how involved is the procedure of replacing all of the above? Do the studs need to be tightened down in any specific order? Thanks in advance for any help!

 

Mine were awful, had to have several helicoiled.

That heat shield isn't really necessary IMO.

 

The cheapest way of replacing the exhaust manifold studs is to order some M12x1.25 rod (I believe that is the size) and make some longer studs.
The holes for the studs are twice as deep as they need to be (i.e. the studs are short). If one of your studs fell out, it probably buggered the threads at the start of the hole. Make some longer studs to run all the way to the bottom.
That's probably the cheapest and easiest way of fixing that.

The pricey (and proper way) is to remove the head, plane the exhaust port flange, plane the exhaust manifold, helicoil any stripped hole, new gasket and new studs from the dealership. This is the sure-fire way of making sure that exhaust manifold doesn't leak.

 

remove it, new gasket, felpro is working fine for me. as stated, have helicoils on hand. its fun. the studs are probably available from the dealer, i know 22reperformance.com has em too

 

The exhaust studs and nuts are cheap at the Stealership. I paid less than 2 bucks a piece for a set. They even have the extended ones. Just get the gasket at napa or something, that was over priced.

 

and as far as tightening sequence, i get everything hand tight, and working from the center out, kinda go by feel. you dont want to put too much pressure on one stud at any time. if a half turn feels good on the first one, go half a turn, and turn all of them untill they feel about the same torque, then do it again. this time, it may only be a quarter turn. just keep tightenin each stud a little at a time till your wrench goes "click" on all of them. then double check.