Help - Broken exhaust manifod studs have defeated me, I think I have to pull the heads.
#16
Best option is a cherry picker... But before I had one, I have been known to use a scrap of 2x8 (on edge) between a floor jack and oil pan flange. And once engine is to desired height, shove other stuff between the engine and cross members to catch it if it shifts. Even wood between oil pan and crossmember. May damage oil pan if things did go south, but the goal is to avoid crushing my body parts.
A bit precarious, yes. But it does a nice job of distributing the load and avoiding damage to oil pan. And the oil pan bolts dig into the wood and kinda lock it into place.
A bit precarious, yes. But it does a nice job of distributing the load and avoiding damage to oil pan. And the oil pan bolts dig into the wood and kinda lock it into place.
#20
Guys,
I made some good progress last night. I was able to remove 2 of the last 4 remaining bolts and now have the drivers side manifold off.
2 left on the pass. side.
One of the studs is broken off 1/4" below the surface of the head. I have the tools to remove this but am going to use PB blaster for a day or so while I work on the other side.
I made some good progress last night. I was able to remove 2 of the last 4 remaining bolts and now have the drivers side manifold off.
2 left on the pass. side.
One of the studs is broken off 1/4" below the surface of the head. I have the tools to remove this but am going to use PB blaster for a day or so while I work on the other side.
#21
Progress!
I really didn't see any evidence for me that pb blaster did anything for me. I had one broken off in the head that I drilled through and then sprayed bp blaster through the hole several times overnight, when I got it out there was no sign it had gotten into the threads.
Couple things...
I used a pick on an empty hole as a depth gauge, if you compare to a stud removed whole I found I had something like 1/4" of space behind the stud and the back of the hole. So when I took a drill to it I was able to check my progress in little steps, then feel the bit come out the back side into the space. If you go crooked and dont hit the space square on the gauge will tell you to stop. If you do this I'd make your own measurements just to be sure of course.
I had given up on a couple and was ready to either drill them out and tap to a bigger size or put in an insert. I started stepping up through left handed drill bits and in general that was what I had the best success with. That 2nd or 3rd bit would bind in the previous bits hole and turn it out. Got a couple with easy-outs also. Had one I welded everything I could find to and then promptly broke whatever i welded to off. Figured it was not coming out, couple left handed bit sizes later and it was in my hand.
Also I had to cut down a couple drill bits to fit the space with a cutoff wheel.
Also also, I took a grinding stone to some broken off proud of the head to make them nice and flat before I started drilling.
I got nice left handed bits and matching easy-outs from mcmaster carr, also the flange head bolts I used to replace the studs from them.
I really didn't see any evidence for me that pb blaster did anything for me. I had one broken off in the head that I drilled through and then sprayed bp blaster through the hole several times overnight, when I got it out there was no sign it had gotten into the threads.
Couple things...
I used a pick on an empty hole as a depth gauge, if you compare to a stud removed whole I found I had something like 1/4" of space behind the stud and the back of the hole. So when I took a drill to it I was able to check my progress in little steps, then feel the bit come out the back side into the space. If you go crooked and dont hit the space square on the gauge will tell you to stop. If you do this I'd make your own measurements just to be sure of course.
I had given up on a couple and was ready to either drill them out and tap to a bigger size or put in an insert. I started stepping up through left handed drill bits and in general that was what I had the best success with. That 2nd or 3rd bit would bind in the previous bits hole and turn it out. Got a couple with easy-outs also. Had one I welded everything I could find to and then promptly broke whatever i welded to off. Figured it was not coming out, couple left handed bit sizes later and it was in my hand.
Also I had to cut down a couple drill bits to fit the space with a cutoff wheel.
Also also, I took a grinding stone to some broken off proud of the head to make them nice and flat before I started drilling.
I got nice left handed bits and matching easy-outs from mcmaster carr, also the flange head bolts I used to replace the studs from them.
#22
#23
Success, yes success!!
All 20 of the studs are now removed.
Bolt-off (aka nut extractors) from Sears was the tool for the nuts, while stud extractors fininshed off the studs above the heads.
The left handed drill bit got deep enough for the easy out on the last broken stud a 1/4" below the head. It was really something to finally see it turn out.
A big thanks to everyone posting including Krewat and 3cv.
All these little tips helped a ton.
Raising the motor
Taking off the shocks and mounts
The right tools for the job!!
But most of all thanks again to the F.T.E. posters. I really don't think I could have got-r-done without all the help.
All 20 of the studs are now removed.
Bolt-off (aka nut extractors) from Sears was the tool for the nuts, while stud extractors fininshed off the studs above the heads.
The left handed drill bit got deep enough for the easy out on the last broken stud a 1/4" below the head. It was really something to finally see it turn out.
A big thanks to everyone posting including Krewat and 3cv.
All these little tips helped a ton.
Raising the motor
Taking off the shocks and mounts
The right tools for the job!!
But most of all thanks again to the F.T.E. posters. I really don't think I could have got-r-done without all the help.
#25
Exhaust bolt troubles
Well, I'm in the same boat as some of you guys, but I'm down to my last stud. Drilled a 1/8" hole all the way thru the remains that are left in the hole, stuck a #2 screw extractor in it and got a few swings on it, then the screw extractor broke clean off. I know these things are made of hardened steel or of a treated alloy. I've ruined plenty of drill bits trying to get another hole in it but to no avail. Anyone have a clue if a titanium coated bit will work? What's next?
I really dread having to pull the cylinder head just for one lousy stud but I'm running out of tricks. What has worked for some of you guys and how did you accomplish it?
P.S. I run this as a commercial truck and exhaust leaks can get me PARKED by DOT. Skipping this bolt is not an option.
I really dread having to pull the cylinder head just for one lousy stud but I'm running out of tricks. What has worked for some of you guys and how did you accomplish it?
P.S. I run this as a commercial truck and exhaust leaks can get me PARKED by DOT. Skipping this bolt is not an option.
#26
If you get the extractor out of it, I'd get a couple more left hand bits and make the hole bigger for a bigger extractor, and you stand a good chance of pulling it while drilling.
#27
#29
#30
Well, I'm in the same boat as some of you guys, but I'm down to my last stud. Drilled a 1/8" hole all the way thru the remains that are left in the hole, stuck a #2 screw extractor in it and got a few swings on it, then the screw extractor broke clean off. I know these things are made of hardened steel or of a treated alloy. I've ruined plenty of drill bits trying to get another hole in it but to no avail. Anyone have a clue if a titanium coated bit will work? What's next?
I really dread having to pull the cylinder head just for one lousy stud but I'm running out of tricks. What has worked for some of you guys and how did you accomplish it?
P.S. I run this as a commercial truck and exhaust leaks can get me PARKED by DOT. Skipping this bolt is not an option.
I really dread having to pull the cylinder head just for one lousy stud but I'm running out of tricks. What has worked for some of you guys and how did you accomplish it?
P.S. I run this as a commercial truck and exhaust leaks can get me PARKED by DOT. Skipping this bolt is not an option.