ws721 Posted April 11, 2014 Share Posted April 11, 2014 Spring is here. Cracked the drain plug, no water, that's always a good sign. charge the batteries. Been sitting since Oct. Looking things over I notice 2 broken manifold bolts. Directly on top of the other. Don't remember that last fall. How much of pain is this going to be? its the left rear head if that makes any difference. Thanks Quote Remember if it's got a hood it's no good! Link to comment Share on other sites More sharing options...
MACKTRUCKS4 Posted April 11, 2014 Share Posted April 11, 2014 Are you sure they are broke? maybe they just came loose and fell out. That happened to me twice. Quote Live every day like it's your last, because one of these days, it will be. Link to comment Share on other sites More sharing options...
bbigrig Posted April 11, 2014 Share Posted April 11, 2014 Ugh...that can be an ugly and expensive job. Some can get away with just changing the troublesome bolts. Other jobs I've seen can be a nightmare with multiple breaks the further you get into the job. Some needing manifolds due to cracks and erosion of the bolt holes etc. Hope yours is nice and easy. Quote Link to comment Share on other sites More sharing options...
ws721 Posted April 11, 2014 Author Share Posted April 11, 2014 The heads of the bolts are gone. I can see the rest of bolts in the manifold. Ok, thanks for the reply. Guess its time to put my big boy pants on and tackle the nasty. Quote Remember if it's got a hood it's no good! Link to comment Share on other sites More sharing options...
BGarofalo Posted April 11, 2014 Share Posted April 11, 2014 Pull the 2 transmission mount bolts and jack up the trans a few inches and it will help give you access to the lower bolt on the manifold. If flat against the head leave the manifold on as a guide for a drill bit. If there is any stub left your better off welding a nut to it. Most of the time they are not actually seized in the head and they come out with some patience. Quote Link to comment Share on other sites More sharing options...
Mack Doctor Jr. Posted April 11, 2014 Share Posted April 11, 2014 I'd weld a nut to it and use map gas and wax. Best way to remove any frozen bolt. That Is if it froze in there 👍 Quote Link to comment Share on other sites More sharing options...
Dirtymilkman Posted April 11, 2014 Share Posted April 11, 2014 If you drill into the bolt, be sure to use left hand drill bits. Lots of times they'll come out with the bit. Quote Link to comment Share on other sites More sharing options...
ws721 Posted April 11, 2014 Author Share Posted April 11, 2014 Excellent suggestions! Thank you Quote Remember if it's got a hood it's no good! Link to comment Share on other sites More sharing options...
BAD DOG Posted April 11, 2014 Share Posted April 11, 2014 I've had good luck using a left hand drill bit on broken bolts, 90 % of the time they work loose while you're drilling and thread out. Plus they're easier to drill before you heat them and you can heat them after if they don't thread out with the drill. Quote Link to comment Share on other sites More sharing options...
phildirt Posted April 11, 2014 Share Posted April 11, 2014 These E-9 manifold bolts are really miseralbe. Probably time/ money ahead to pull the 2 heads, as one unit, separate the manifolds at the joint and set them up on a mill table. Be ready for a complete shock if you order the bolts Mack sells for this application- around $20 per bolt. Quote Link to comment Share on other sites More sharing options...
ws721 Posted April 12, 2014 Author Share Posted April 12, 2014 Yeah I have heard that head bolts cost more than used car. Guess I better plan ahead and not make this a weekend fix. Was suppose to start trucking out of Pa next week. Maybe I better use the MH until I get the Cruiseliner fixed right Quote Remember if it's got a hood it's no good! Link to comment Share on other sites More sharing options...
rw613 Posted April 12, 2014 Share Posted April 12, 2014 I have had to cut the manifolds off with the torch before because the bolts were froze in manifold Quote Link to comment Share on other sites More sharing options...
gearhead204 Posted April 12, 2014 Share Posted April 12, 2014 ridged makes some spline drive extractors that are quite handy for this problem, they also come with drill pilots to keep the bit centered in the stud. a right angle drill will also be handy, the slower the speed the better. 1 Quote Link to comment Share on other sites More sharing options...
ws721 Posted April 12, 2014 Author Share Posted April 12, 2014 That may be the way to go. Thanks for all your input Quote Remember if it's got a hood it's no good! Link to comment Share on other sites More sharing options...
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