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Old 03-22-2020, 08:57 PM   #1 (permalink)
ArchaicAeronaut
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Help with main bearing torque

I am just getting ready to put the oil pan back on 2004 motor. Since it is a used motor (new to me) my buddy suggested I retorque all main and rod bearings before reinstalling it. Unfortunately, I'm using a 1993 shop manual for this 2004 Humvee pull. All the inner bolts didn't budge, nor the front or rear main outers, however the outers on 2,3,4 turned significantly as I torqued them to 100 ft lbs. I knew something was wrong, and should have known better for these 13 MM bolt heads. What should I do release the torque and what torque should I use? Thanks, scared to death I screwed up bad!

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Old 03-22-2020, 09:35 PM   #2 (permalink)
Glagulator
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Engine assembly from 1999 manual, should be the same as your 2004.
You really should look up info or ask before guessing.
Those outer main bolts are particularly troublesome.


https://www.dieselplace.com/forum/at...mechanical.pdf

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Old 03-23-2020, 07:38 AM   #3 (permalink)
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To ease your mind try finding replacement bolts or use arp main studs.The arp studs really strengthen the lower end.The outer 10mm bolts don’t require a whole lot of torque unlike the inners.
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1993 Chevy K1500 Z71...with 97' 6.5 TD 506 block,82' 6.2 rocker arms,stanadyne injectors,stanadyne blue tag 4911,DSG girdle,reman 89’ 700R4,Banks boost/pyrometer gauges,acdelco TP1069/TP943 fuel filter setup,4” diamond eye exhaust/2 piece crossover

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Last edited by dieselolds; 03-23-2020 at 07:39 AM.
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Old 03-23-2020, 05:50 PM   #4 (permalink)
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Quote:
Originally Posted by Glagulator View Post
Engine assembly from 1999 manual, should be the same as your 2004.
You really should look up info or ask before guessing.
Those outer main bolts are particularly troublesome.


https://www.dieselplace.com/forum/at...mechanical.pdf
Unfortunately kind of off due to the Covid 19 concerns.I just never considered that the torques would be that much different, and with other things on my mind, I didn't think critically till I had already moved one of the bolts significantly. Yeah stupid me I didn't come back to reality till I had turned several and realized how far I was going and that the bolt heads didn't really look like they should be high torque. I went back in 20 min later and was able to relieve the torque on them.
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Old 03-23-2020, 07:44 PM   #5 (permalink)
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Quote:
Originally Posted by dieselolds View Post
To ease your mind try finding replacement bolts or use arp main studs.The arp studs really strengthen the lower end.The outer 10mm bolts don’t require a whole lot of torque unlike the inners.
Okay, a couple of questions. I didn't see anywhere, (and I don't have the specific year Humvee manual) if these out side bolts (6 or them)are TTY type bolts. The torques I found on google showed both wet and dry torques (not sure the diff) and whether the bolts were 10mm or 12 mm.
They did take a 13mm socket, and the head had a large skirt.

The large bolts didn't budge. Since I was able to loosen the bolts I tightened, I was going to just torque them to 48 foot lbs (48 for 10mm bolts and 55 for 12mm) and give them the 1/4 turn the torque sheet called for, unless someone gives me a better direction. My thinking is that since the inner bolts remain solid, I won't mess with them at all. I just wish I hadn't taken my buddy's advice.

I am listening and brain is engaged after this weekend, so if you have more words of wisdom I am listening. Thanks everyone.
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Old 03-23-2020, 08:10 PM   #6 (permalink)
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in the 99 manual, the 12mm (18mm head) inner bolts all end up at #55 + 90'. The outer 12mm (18mm head caps #1 and #5) then go to #48 + 90'.
The outer 10mm (13mm head) go to #30

There is a detail on torque sequence and setting the thrust bearing but since yours were never off you should not need to do that. Also all these torque specs are assuming oil as lube.

I had your same question about them being tty bolts and whether they need replacing being that they are being "reused" but good luck finding them. There were no horror stories I could find so I am just going to treat them like a normal bolt. If I had time and dough I would definitely get the stud kit. ESPECIALLY if the webbing on your block is crack free.

Anyhow, being that you did not put things under a ton of stress (ran the motor, heat cycles, etc) you will probably be ok with going back to proper spec. Maybe just get some brakekleen and inspect all the caps and block for cracks one more time around the small bolt locations.

Good luck!
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Old 03-24-2020, 07:14 AM   #7 (permalink)
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Quote:
Originally Posted by ArchaicAeronaut View Post
Okay, a couple of questions. I didn't see anywhere, (and I don't have the specific year Humvee manual) if these out side bolts (6 or them)are TTY type bolts. The torques I found on google showed both wet and dry torques (not sure the diff) and whether the bolts were 10mm or 12 mm.
They did take a 13mm socket, and the head had a large skirt.

The large bolts didn't budge. Since I was able to loosen the bolts I tightened, I was going to just torque them to 48 foot lbs (48 for 10mm bolts and 55 for 12mm) and give them the 1/4 turn the torque sheet called for, unless someone gives me a better direction. My thinking is that since the inner bolts remain solid, I won't mess with them at all. I just wish I hadn't taken my buddy's advice.

I am listening and brain is engaged after this weekend, so if you have more words of wisdom I am listening. Thanks everyone.
What you could do is buy the DSG main stud kit with two braces.They are in Saskatoon Canada under DSG services I think but a google search will tell you more.Its not overly expensive.It just contains 6 arp outer studs for the mains 2,3 and 4.Comes with nuts and hardened washers.I put a kit in my 97 506 engine but it had 12mm main bolts all throughout.They will have the 12mm and 10mm to choose from.I hope this helps.
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1996 Chevy K1500 Z71.....with '99 6.5 506 goodwrench van engine,88-93 6.2 diesel Napa y-pipe,'87 700R4,acdelco TP630F/Racor 20S fuel filter setup,Bosch non-turbo injectors,stanadyne blue tag 5088

1993 Chevy K1500 Z71...with 97' 6.5 TD 506 block,82' 6.2 rocker arms,stanadyne injectors,stanadyne blue tag 4911,DSG girdle,reman 89’ 700R4,Banks boost/pyrometer gauges,acdelco TP1069/TP943 fuel filter setup,4” diamond eye exhaust/2 piece crossover

2008 Mercedes Benz E320 3.0 V6 turbo diesel

2013 Volkswagen Passat 2.0 TDI

Last edited by dieselolds; 03-24-2020 at 07:15 AM.
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Old 03-24-2020, 04:10 PM   #8 (permalink)
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Quote:
Originally Posted by dieselolds View Post
What you could do is buy the DSG main stud kit with two braces.They are in Saskatoon Canada under DSG services I think but a google search will tell you more.Its not overly expensive.It just contains 6 arp outer studs for the mains 2,3 and 4.Comes with nuts and hardened washers.I put a kit in my 97 506 engine but it had 12mm main bolts all throughout.They will have the 12mm and 10mm to choose from.I hope this helps.
Hey Thanks Dieselolds, shouldn't be any need to mess with the inners, and if this kit only comes with the 6 outers that would be sweet. I'll check it out and let you know
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Old 03-24-2020, 05:50 PM   #9 (permalink)
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Kennedy Diesel has them... 185.00$



https://www.kennedydiesel.com/catego...ubCategory2=93
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Old 03-24-2020, 06:28 PM   #10 (permalink)
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Quote:
Originally Posted by ArchaicAeronaut View Post
Hey Thanks Dieselolds, shouldn't be any need to mess with the inners, and if this kit only comes with the 6 outers that would be sweet. I'll check it out and let you know
No problem.It’s only for the outer section for 2,3 and 4 so you’ll be in good shape when you put that kit in.Make sure you get the 10mm kit.

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1996 GMC Sierra ext.cab Z71....with new genuine GM 6.2 660 short block,4L80E/6.5TD cylinder heads,82' 6.2 rocker arms,acdelco TP1069/Racor 20S fuel filters,4" diamond eye exhaust,3.73 G80 locker,stanadyne injectors

1996 Chevy K1500 Z71.....with '99 6.5 506 goodwrench van engine,88-93 6.2 diesel Napa y-pipe,'87 700R4,acdelco TP630F/Racor 20S fuel filter setup,Bosch non-turbo injectors,stanadyne blue tag 5088

1993 Chevy K1500 Z71...with 97' 6.5 TD 506 block,82' 6.2 rocker arms,stanadyne injectors,stanadyne blue tag 4911,DSG girdle,reman 89’ 700R4,Banks boost/pyrometer gauges,acdelco TP1069/TP943 fuel filter setup,4” diamond eye exhaust/2 piece crossover

2008 Mercedes Benz E320 3.0 V6 turbo diesel

2013 Volkswagen Passat 2.0 TDI
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