Lmackattack Posted June 8 Share Posted June 8 I'm trying to pull both heads off to do head gaskets. And one of the studs I think is carbon seized in the head. The heads came up off the block about 1/2" but to get that it needed lots of prying on the front head. The rear head is moving freely. it's just the front head and a middle stud that won't wiggle at all. I'm about to weld a nut to the stud just to see if I can remove the stud itself. Am I missing something here or is it likely what I'm thinking with a carbon build up siezed stud? Any tricks to try before I weld the nut to the stud? I did pull all hoses,the tip turbine bracket with 3 head studs under it. All studs are free or nuts came off the studs. It's just one stud that lookes like a tight fit and when I pry the head will not move up around it. Quote Link to comment https://www.bigmacktrucks.com/topic/74247-2v-maxidyne-issue-pulling-heads-off/ Share on other sites More sharing options...
Joey Mack Posted June 8 Share Posted June 8 can you double nut the stud and back it out? the studs are set hand tight then back a half turn, so i suspect rust in the head bore. I have extra nuts and studs if you damage them.. jojo 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74247-2v-maxidyne-issue-pulling-heads-off/#findComment-553305 Share on other sites More sharing options...
Lmackattack Posted June 8 Author Share Posted June 8 1 hour ago, Joey Mack said: can you double nut the stud and back it out? the studs are set hand tight then back a half turn, so i suspect rust in the head bore. I have extra nuts and studs if you damage them.. jojo I can't with the factory nuts as it has a deep shoulder below the hex and very little thread is exposed when tight I can probably double nut it if I force the head back down to expose more threads and then grind down a nut and thread it on first. I'm going to tinker with it some more tomorrow after the rain clears. I just wanted to make sure I'm not missing something as it's been 10 years since I last pulled a head on a 2v 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74247-2v-maxidyne-issue-pulling-heads-off/#findComment-553309 Share on other sites More sharing options...
Popular Post mrsmackpaul Posted June 9 Popular Post Share Posted June 9 Are you trying to pull both heads at once I'm only asking because the manifolds are still attached in the photos If so I'm not surprised the heads are binding on the studs And in the photo showing the gap the injector lines are still attached I dunno my ass from my elbow but when I have done these all this stuff comes off at disassembly and goes back AFTER THE HEADS ARE TORQUED DOWN so maybe pull all this stuff first and then pull the heads Paul 2 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74247-2v-maxidyne-issue-pulling-heads-off/#findComment-553328 Share on other sites More sharing options...
Joey Mack Posted June 9 Share Posted June 9 Good Eye mate,, 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74247-2v-maxidyne-issue-pulling-heads-off/#findComment-553329 Share on other sites More sharing options...
mrsmackpaul Posted June 9 Share Posted June 9 Note the intake and exhaust manifolds have flexible joints in them, two on the exhaust and one on the intake Your heads are most likely binding on the studs as the heads droop a bit Paul 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74247-2v-maxidyne-issue-pulling-heads-off/#findComment-553330 Share on other sites More sharing options...
fjh Posted June 9 Share Posted June 9 Just weld the nut on the suspect stud bud ! Just my opinion ! 2 Quote Link to comment https://www.bigmacktrucks.com/topic/74247-2v-maxidyne-issue-pulling-heads-off/#findComment-553333 Share on other sites More sharing options...
BOBWhite Posted June 10 Share Posted June 10 (edited) If you can get the head up a 1/2 Inch you may be able to stick something in between the head and the piston and force it up by barring over the motor. I've seen fokes stuff rags down spark plug (injector) holes and force heads off that way. Probably should be your last ditch effort as this could screw something up. You could also try and pulling the head up as far as it will go and clamping vice grips on the stud from the bottom to try and get it loose. That way you don't screw up the threads. Good Luck! Edited June 10 by BOBWhite Quote Link to comment https://www.bigmacktrucks.com/topic/74247-2v-maxidyne-issue-pulling-heads-off/#findComment-553394 Share on other sites More sharing options...
Joey Mack Posted June 10 Share Posted June 10 I have extra studs and nuts i can send them too you. The nuts are obsolete.. I got you... 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74247-2v-maxidyne-issue-pulling-heads-off/#findComment-553396 Share on other sites More sharing options...
JoeH Posted June 10 Share Posted June 10 Take those manifolds off first.... You're asking for trouble there... 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74247-2v-maxidyne-issue-pulling-heads-off/#findComment-553416 Share on other sites More sharing options...
JoeH Posted June 10 Share Posted June 10 Go buy jam nuts they're flatter. Should be able to double nut a couple jam nuts. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74247-2v-maxidyne-issue-pulling-heads-off/#findComment-553417 Share on other sites More sharing options...
JoeH Posted June 10 Share Posted June 10 Also, when you get those heads off, YOU CANNOT SET THEM DOWN RIGHT SIDE UP!! You will crush the injector nozzle tips!! 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74247-2v-maxidyne-issue-pulling-heads-off/#findComment-553418 Share on other sites More sharing options...
Lmackattack Posted June 10 Author Share Posted June 10 Thanks for the help everyone I was able to double nut the one stuck stud and wound it out. It was really gummed up. Had to wind the stud up and down with penetrant oil to get it pulled ot out all the others cam out with my fingers. With all the studs removed the Heads came off like butter as an assembly. I had all the studs removed but still sitting in their holes as I was trying to keep them in order as I'm doing this job outside and have limited work space. But That's another story. Yes i saw the tips, I sat the heads on a few boards as to not crush the injector tips. I'm just slapping a new head gasket on and going. Hopefully it's not a cracked liner and I'll be back up and running after I get the replacement head gaskets end of this week. 2 Quote Link to comment https://www.bigmacktrucks.com/topic/74247-2v-maxidyne-issue-pulling-heads-off/#findComment-553453 Share on other sites More sharing options...
fjh Posted June 11 Share Posted June 11 20 minutes ago, Lmackattack said: Thanks for the help everyone I was able to double nut the one stuck stud and wound it out. It was really gummed up. Had to wind the stud up and down with penetrant oil to get it pulled ot out all the others cam out with my fingers. With all the studs removed the Heads came off like butter as an assembly. I had all the studs removed but still sitting in their holes as I was trying to keep them in order as I'm doing this job outside and have limited work space. But That's another story. Yes i saw the tips, I sat the heads on a few boards as to not crush the injector tips. I'm just slapping a new head gasket on and going. Hopefully it's not a cracked liner and I'll be back up and running after I get the replacement head gaskets end of this week. Doubt it’s a cracked liner ! Make sure the fire ring grooves are clean and not too shuffled! 2 Quote Link to comment https://www.bigmacktrucks.com/topic/74247-2v-maxidyne-issue-pulling-heads-off/#findComment-553462 Share on other sites More sharing options...
mechohaulic Posted June 11 Share Posted June 11 only one gummed up stud !! you came out lucky. many times due to time constrains head gaskets are changed with heads still clamped together by manifolds. it will work BUT life span of the gaskets may be shortened. when heads are set/torqued individually torque per head is tad more accurate. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74247-2v-maxidyne-issue-pulling-heads-off/#findComment-553463 Share on other sites More sharing options...
mechohaulic Posted June 11 Share Posted June 11 toolbox always had a drawer with the plastic caps for things such as open ports on injection pump. any work activity such as the removal of heads put dirt/grit in those holes. at least a rag to cover. just sayin. looking at those excellent pictures has the brain cells going "remember when " the fun days. after assembly ; best part is sound engine makes on start up. 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74247-2v-maxidyne-issue-pulling-heads-off/#findComment-553465 Share on other sites More sharing options...
Joey Mack Posted June 11 Share Posted June 11 I made a lifting bar that lets me pull both heads at the same time. It is fine if the intake is a 2 peice the water manifold is anyway. Those typically had leaking exhaust gaskets, so it wasnt a big deal and it saves time. once on the bench, I will pull manifolds as needed and prep them, put intake and water manifold on with new gaskets and hoses, set the heads back on and do the line up with a straight edge then the exh manifolds.. ... 2 Quote Link to comment https://www.bigmacktrucks.com/topic/74247-2v-maxidyne-issue-pulling-heads-off/#findComment-553466 Share on other sites More sharing options...
mechohaulic Posted June 11 Share Posted June 11 might have to keep some pictures close by on reassembly. at least the picture showing location of the three odd ball studs used to clamp angle bracket for tip-turbine fan(intercooler) brace. 2 Quote Link to comment https://www.bigmacktrucks.com/topic/74247-2v-maxidyne-issue-pulling-heads-off/#findComment-553467 Share on other sites More sharing options...
fjh Posted June 11 Share Posted June 11 Yup he had pics I seen em 2 Quote Link to comment https://www.bigmacktrucks.com/topic/74247-2v-maxidyne-issue-pulling-heads-off/#findComment-553468 Share on other sites More sharing options...
fjh Posted June 11 Share Posted June 11 😅 Quote Link to comment https://www.bigmacktrucks.com/topic/74247-2v-maxidyne-issue-pulling-heads-off/#findComment-553469 Share on other sites More sharing options...
Joey Mack Posted June 11 Share Posted June 11 thats one that i have ZERO knowledge of. I know a tip turbin when I see one, but have never pulled one apart... maybe someday, who knows.. I did get a call today from a past customer.. he wants me to show him how to re-build an E-7 .. I just have to buy the cam bushing driver head, otherwise I have all the tools I need. I have built 5 engines for him and have one in my shop here that is his dad's, so I guess I have mre work in the future.. 2 Quote Link to comment https://www.bigmacktrucks.com/topic/74247-2v-maxidyne-issue-pulling-heads-off/#findComment-553470 Share on other sites More sharing options...
fjh Posted June 11 Share Posted June 11 Yup and so you should!👍 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74247-2v-maxidyne-issue-pulling-heads-off/#findComment-553471 Share on other sites More sharing options...
mechohaulic Posted June 11 Share Posted June 11 9 minutes ago, Joey Mack said: I made a lifting bar that lets me pull both heads at the same time. It is fine if the intake is a 2 peice the water manifold is anyway. Those typically had leaking exhaust gaskets, so it wasnt a big deal and it saves time. once on the bench, I will pull manifolds as needed and prep them, put intake and water manifold on with new gaskets and hoses, set the heads back on and do the line up with a straight edge then the exh manifolds.. ... pulling both as one unit -no problem . except when only lifting device is two hands and strong back. the reassembly done MANY times as one unit works. prefer reassembly as two separate units myself. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74247-2v-maxidyne-issue-pulling-heads-off/#findComment-553472 Share on other sites More sharing options...
fjh Posted June 11 Share Posted June 11 44 minutes ago, Lmackattack said: Thanks for the help everyone I was able to double nut the one stuck stud and wound it out. It was really gummed up. Had to wind the stud up and down with penetrant oil to get it pulled ot out all the others cam out with my fingers. With all the studs removed the Heads came off like butter as an assembly. I had all the studs removed but still sitting in their holes as I was trying to keep them in order as I'm doing this job outside and have limited work space. But That's another story. Yes i saw the tips, I sat the heads on a few boards as to not crush the injector tips. I'm just slapping a new head gasket on and going. Hopefully it's not a cracked liner and I'll be back up and running after I get the replacement head gaskets end of this week. Trent you sure that’s not a 315? 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74247-2v-maxidyne-issue-pulling-heads-off/#findComment-553473 Share on other sites More sharing options...
Lmackattack Posted June 11 Author Share Posted June 11 21 minutes ago, fjh said: Doubt it’s a cracked liner ! Make sure the fire ring grooves are clean and not too shuffled! Hope not. Liners were very smooth so she probably needs new rings and a cross hatch. At that point might as well inframe it. I'm not sure if it's ever been rebuilt. Pistons looked very clean for it's age. No carbon build up on them or heads. What is the 542c stamp on the piston telling us.? Quote Link to comment https://www.bigmacktrucks.com/topic/74247-2v-maxidyne-issue-pulling-heads-off/#findComment-553475 Share on other sites More sharing options...
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