Shimmy1
Senior Member
Not looking to start a war, but if I caught someone hammering my head bolts in with an impact, let's just say there would be a problem.
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Cummins ISX 13Liter sounds bad
- Thread starter walkerv
- Start date
walkerv
Senior Member
Yes barely at times . I used my baby multiplier a couple of times .
walkerv
Senior Member
It is recommended way of doing it per cummins , the bolt does not care how it is turned 90 degrees.
walkerv
Senior Member
No war shimmy , it is very awkward to use a multiplier on a head bolt, it took 8 foot of leverage to break those buggers free when I took apart just so I could get them out with an impact . Torque to yield fasteners are not fully understood by many , after initial torque is set , why would that bolt care how it is turned , it does the same thing either by hand or with an impact. It is probably the sight and principle of it when someone is seen turning torque with an impact. I quit telling anyone what I was doing when asked . If it is more then 60 degrees and I can get air on it controllably , I will be putting air on it . Heads mains rods any torque to yield fastener . Old guys at dealer I worked at torqued the 600 lbs ft cat mains with an impact and called it a day , that I did not agree with there was plenty of young ones around that could have help pull the torque wrench.
JPV
Senior Member
A friend of mine has been a Cummins mechanic for many years. He was torquing a head with an impact gun years ago when the supervisor caught him and chewed him out. He asked why it was wrong and supervisor couldn't answer, it then showed up in service manual as the way to do it. I love torquing by degrees, impact gun is so much easier than rowing the boat with the torque wrench!
Truck Shop
Senior Member
Sh!t the bed------------------I've been using a impact on Cat, Cummins for years and years, On a inframe cranking down a Cat main bolt with multiplier or just a 600 lb torquer-- I'm too damn old
for that Horse Sh!t----------Snap On 1300 3/4 drive, mark the socket and hit the trigger. I don't know how many I've done--and never ever had a issue.
Years ago rolling bearings in a Big Cam III in a Pete cab over/ There is a aluminum belly strap at the back of the pan to remove and two solid aluminum stubs left hanging from frame.
Last bolt to torque, the barrel ratchet gave/popped just before brake over 305 lbs, My left hand went straight into the hanging stub on right side, my middle finger and index took it
head on-Exploded the ends of both fingers--bone hanging out. Fortunately there was a visiting er doc from Harbor View at the local hospital that day-he saved my two fingers.
Want a rant---------------------Fu@k those torque wrenches when I can gun'em !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
for that Horse Sh!t----------Snap On 1300 3/4 drive, mark the socket and hit the trigger. I don't know how many I've done--and never ever had a issue.
Years ago rolling bearings in a Big Cam III in a Pete cab over/ There is a aluminum belly strap at the back of the pan to remove and two solid aluminum stubs left hanging from frame.
Last bolt to torque, the barrel ratchet gave/popped just before brake over 305 lbs, My left hand went straight into the hanging stub on right side, my middle finger and index took it
head on-Exploded the ends of both fingers--bone hanging out. Fortunately there was a visiting er doc from Harbor View at the local hospital that day-he saved my two fingers.
Want a rant---------------------Fu@k those torque wrenches when I can gun'em !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Birken Vogt
Charter Member
Whenever there is an easier procedure there is always someone who comes along and says that that the easier procedure is not valid, and we should keep doing it the hard way, without giving very good reasons....
Not directing this at Shimmy, you must have heard it from someone somewhere at sometime as well, but they were wrong. There are any number of people in every arena that just like to make things up.
Not directing this at Shimmy, you must have heard it from someone somewhere at sometime as well, but they were wrong. There are any number of people in every arena that just like to make things up.
Truck Shop
Senior Member
I use Detroit peanut butter on the threads and cover the head bolts and washers with moly engine assembly lube, mains and rod bolts/nuts moly engine lube. Bolts/nuts spin
right down. Cat requires covering the head bolts completely with moly.
Keep using those torque wrenches and rowing the crap out of your selves--When you get old you
will be visiting the doctor who replaces shoulder parts and rotator cups not to mention neck problems.
right down. Cat requires covering the head bolts completely with moly.
Keep using those torque wrenches and rowing the crap out of your selves--When you get old you
will be visiting the doctor who replaces shoulder parts and rotator cups not to mention neck problems.
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DB2
Senior Member
There will always be a difference of opinions on the matter but here is my take. An impact wrench in the hands of someone skilled is a great asset. Someone unskilled though and the results could be disastrous. Picturing some noob hammering up tire lugs on his pickup with a strong 3/4 inch gun.
Truck Shop
Senior Member
That's why you take your work to a reputable mechanic or ask a bunch of questions.
walkerv
Senior Member
The 300ftlbs was bad enough by hand , I would have probably hurt myself doing the 90Degree by hand . It doesn't sound like much until people realize it was a 3/4 inch impact with good size air line struggling with no extension just a socket.
Nige
Senior Member
All this talk of torque makes me glad we have Hytorcs..........
If you jib at 300 ft lbs what would you be like with 3000 on a 789 front suspension.?
If you jib at 300 ft lbs what would you be like with 3000 on a 789 front suspension.?
walkerv
Senior Member
I do those mack u bolts at 1500 with a 4-1 multiplier . If I worked with mining equipment im sure we would have plenty of nice toys to play with.
You're describing virtually every tire shop here. Run the nuts on with a big impact, then go with the torque wrench and every single one clicks instantly because they are way over torqued.
Then the odd guy like me who watches tells them to take them off and do it properly, then they bitch and complain.
walkerv
Senior Member
Ok so engine has been assembled for a couple weeks at least fixing all the previous shoddy repairs I think took longer then the overhual .having to stop and work on other trucks slows down stuff also . I managed to light it off for the first time today , and immediately found 2 problems . 1 as soon as oil got to the top end the Jake's started working so I have a stuck solenoid or bad o rings letting oil get to the Jake rockers , 2 it doesn't shut down rite away when the key is turned off . I will sort those problems out Monday afternoon hopefully .
walkerv
Senior Member
Ok all my problems are stemming from 6 exchange injectors I got from fuel shop in Tennessee. Number 5 and 6 cylinder I can hold my hand on manifold 1-4 i have to check with heat gun but one of them is bad fuel knocking and misfiring and apparently leaking fuel once engine runs for a little bit it runs of the flooded cylinder it seems till fuel is gone . I am not pleased , and await a phone call . I will probably remove all 6 and send back for them to make right . So for now the mail box stays on the truck she is a garage queen at the moment lol.
walkerv
Senior Member
I will add i dont have cummins computer so cant check crap with it and truck was previously modified by previous owners, boss does not want to make compliant so I have to watch who works on truck if it ever goes out for repair .
crane operator
Senior Member
That stinks. Good luck- and I've been enjoying the progress.
walkerv
Senior Member
Thanks , I kind of become at peace with this model of engine it really wasn't a bad overhual to do I was just unfamiliar with it . Grey engine mack I can dismantle truck and engine and throw all bolts in same bucket and still put bolts where they go , I had to be more careful with this one . And actually lay stuff out as I disassemble... more to come it seems .