I finally got the plugs to close off the exhaust port through the intake manifold today. I thought I was going to actually get somewhere with the car, putting it back together. I put the plugs in the holes, and got the intake gasket in place and sealed. Then I put the intake manifold in place and started all the bolts. Now it was time to start torque them down. The book said 55 lbs, so I started with 25 lbs. Got them all torqued. Then I went to 40 lbs. Started with the first bolt in the sequence, according to the book. The torque wrench wouldn't "click". Hmmmm, I went to the second bolt, it worked fine. OK, back to the first 1, 2 more pulls and the bolt broke:af: . I quickly got it out with an easy out. The bolts don't look too bad, don't look original. Is this just normal fatigue on the bolts? Should I just replace them before I go any farther? I did try to tighten a few more, but, some of them seemed like they would do the same thing. They don't actually get tight, but feel funny when I'm tightening them. o No: Just wondering if I would be farther ahead if I just replaced them all now before I have more problems. Dan:3gears:
I stopped at the local nut and bolt shop today and got a set of stainless steel bolts to put in the intake manifold. He told me I was breaking them because I was torquing them too mucho No: The book I have has the intake manifold bolts getting torqued to 55 lbs. Is that the right amounto No: Also, should I put never seize, lock tight or nothing at all on the boltso No: I put high heat never seize on the bolts I put in the exhaust manifolds and lock tight on the valve cover bolts. I'm not sure if I was right with either though. Thanks, Dan :3gears:
Dan, Did you install everything the way it came off? In other words all you did was remove the intake and installed the "plugs" then re-assembled? Did you re-use the stock intake gasket? Did you make sure the plugs didn't extent beyond the surface of the intake? Seems to me it has to be something binding,so that it isn't true"smooth level surfaces"? Re-Think everything you did,something is not squared"True".!:Smarty:
I removed the heads to drill out some broken bolts too. I did make sure that the plugs were flush with the heads. I even put the old bolts back in the original order they came out. When I first broke the first bolt, I quickly drill it out and replaced it with another bolt I had of the same size. That 1 went into the same hole, no problems. I really think the bolt are weak for some reason. I haven't broken any of the replacement bolts. All the bolts that broke were the original ones. The bolts screw in, until they contact the manifold itself, quite easy. I don't think there is anything binding, but I'll check it out. Thanks Dan:3gears:
