Thread: Bolt holding in antifreeze

2005 GTP. I was removing the back exhaust manifold, and I cam e across a screw that I thought was still holding the manifold on, but when I took the screw out antifreeze came a gushing out. It was close to spark plug 2. I'm sure someone here knows what that is??

I needed to flush the coolant system anyway.

An actual bolt ? The only one I can think of that would do that would be a couple of the SC idler pulley stand ones.. but they are on the front of the engine.

You say screw.. so that's a little odd. On the back.. let's go over the bolts back there. Bracket that holds the o2/plug wires and engine cover will not leak coolant. Exhaust bolts won't leak coolant. Bracket for engine lift won't leak coolant.

Can you get a picture of the area and offending bolt? I may have been out of the 3800 game for a while.....but I'm really at a loss for that bolt you are talking about....and not to be full of myself.... but I'd remember that bolt.

Not sure why I used screw. It's a bolt about 2.5 inches long and 14mm head. I was actually able to get the phone back there and took the picture upside down. You can see the bolt in the picture right next to spark plug 2 in back by the alternator.

damn, you pulled the head bolt out. no wonder coolant came out lol

I was feeling around back there wondering what was still holding the manifold on, and that puppy was right there. So out it came and a decent amount of antifreeze. You learn something new everyday. lol

those bolts are in there super tight. so i hope you made it good and tight. its a tty bolt so you cant really re tq it like it should be. lets hope you dont blow a head gasket from removing it. id think you should be safe tho.

Do I need to get a new stock bolt? I read that it should be torqued to 37ft pounds and then rotated 120*. So what does that come out to?

the 120 degrees is the bolt stretching. a set of new head bolts is like 20 bucks. i used a degree wheel when i did my head install. you will need a long breaker bar and some muscle lol

So is the 37ft lbs correct for the torque? Then rotate another 120*? Someone has to of calculated what the actual torque would be including turning another 120 degrees.

The ending torque could be different depending on the size of the bolt and the thread pitch but at a guess it's over 50ft lbs.

If you got a torque wrench do the 37 and 120º, or just make it really snug lol.

theres no tq rating for stretching a bolt. like i said your gonna be pulling pretty damn hard on the bolt to get to 120 degrees, feels like its gonna snap.

Bolt size and torque spec thread. this thread has the heads tq in it.

50? nahhh the 120 on a head bolts was 10 times more then tq at 116 for a hub nut.

According to the diagrams, it would be bolt 5 for me. I'm just going to do the 37 then 120* and call it a day. And of course get a new bolt.