Head gasket
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From: Gilbert, Az
Head gasket
Well I noticed a puddle underneith my truck today. Checked it and sure enough it was coolant. Its leaking on the passenger side above the oil cooler. Checked the oil and its clean. Looks like its been leaking for a while and I never noticed it. Anyways I was wondering about the marine head gasket. I know its thicker and will possibly make for harder starts but that is no biggie for me. Would this be an alright combo with stock bolts for rigtht now then upgrade to studs? I am on a tight budget right now and I am going to take it easy on the truck for a while.
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From: Fort Worth,TX
Doing research on this now for me 
My 2cents; I have about the same engine setup..I'm looking into oring and ARP bolts..
Many say DON"T reuse the originial bolts..because they have streched..They have a gauge to compare to for this..but despite being on a budget too. I'm not taking the chance, and want this weakest link to be as tough as I can get it this ONE time so I don't get out in BFE where no one knows about this kinda stuff, can't get it and have to tow or live in some area waiting on parts...
Know that it is not good news, but its the safest news..still checking on the o ring stuff..hope it may help
My 2cents; I have about the same engine setup..I'm looking into oring and ARP bolts..
Many say DON"T reuse the originial bolts..because they have streched..They have a gauge to compare to for this..but despite being on a budget too. I'm not taking the chance, and want this weakest link to be as tough as I can get it this ONE time so I don't get out in BFE where no one knows about this kinda stuff, can't get it and have to tow or live in some area waiting on parts...
Know that it is not good news, but its the safest news..still checking on the o ring stuff..hope it may help
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Thumper 549 is right, but is not just Cummins. Most high strength bolts used in this sort of application are a single use only. To get enough stable and long term force to hold two objects together (like the heads on our engines to keep them from leaking) the bolts are permenantly deformed during the torque process.
If they get torqued more than a few times they become over stretched and won't hold the load. The bolt will break or stretch leading to the head gasket blowing. As to how many times you can torque the bolts is a big game of chance. Even measuring the bolts won't give you a good idea since you don't know what the original length of each bolt was before it was initially installed.
My old VW rabbit, had the same issue.
Scott
If they get torqued more than a few times they become over stretched and won't hold the load. The bolt will break or stretch leading to the head gasket blowing. As to how many times you can torque the bolts is a big game of chance. Even measuring the bolts won't give you a good idea since you don't know what the original length of each bolt was before it was initially installed.
My old VW rabbit, had the same issue.
Scott
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From: Gilbert, Az
Im thinking if it worse comes to worse, to just buy replacement headbolts for now. I am still wondering about gaskets I have searched around and came up with no real conclusion. Marine headgasket , stock or what.
Anny suggestions?
Anny suggestions?
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From: stupid ohio
I tried to limp by with new stock headbolts after oringing the head since ARP wasn't quite done with their studs yet. I suggest doing it right the first time. You're pushing a good amount of fuel for the 14.40 quarter mile times in your sig so I would recommend head studs from a reputable company- if you don't feel like replacing the bolts and head gasket again.
brandon.
brandon.
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From: Gilbert, Az
Is arp the only people that offer head studs? I may be able to get them at cost (whatever that is). Also, I might be able to o-ring the head for real cheap while getting it decked, should I go this route?
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From: stupid ohio
Originally posted by herb
was told by Cummins today that there is a service bullitin down on my engine changing head bolt torqe from 66 lbs to 77 lbs
was told by Cummins today that there is a service bullitin down on my engine changing head bolt torqe from 66 lbs to 77 lbs
"Cylinder Head—Bolts
Step 1 59 ft/lbs
Step 2 77 ft/lbs
Step 3 Verify 77 ft/lbs
Step 4 Rotate All Bolts 1/4 Turn"
The 1/4 turn is estimated to be around 125 ft/lbs.
I'm not sure what your Cummins shop meant when they said from 66 to 77?
brandon.
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From: Northwest, Minnesota USA
I've got photos of a NEW Cummins bolt that snapped on a 120 lb re-torque. Glad I ordered the studs.
FWIW
My brother had head gasket troubles on the 4 cyl turbo diesel on his snow blower. After a few replacements they (JD) finally told him of a service bulletin that increased the torque around 10%. No more blown gaskets.
FWIW
My brother had head gasket troubles on the 4 cyl turbo diesel on his snow blower. After a few replacements they (JD) finally told him of a service bulletin that increased the torque around 10%. No more blown gaskets.
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From: Battle Creek Michigan
Originally posted by joefarmer
From the Cummins Manual in the 2001 FSM:
"Cylinder Head—Bolts
Step 1 59 ft/lbs
Step 2 77 ft/lbs
Step 3 Verify 77 ft/lbs
Step 4 Rotate All Bolts 1/4 Turn"
The 1/4 turn is estimated to be around 125 ft/lbs.
I'm not sure what your Cummins shop meant when they said from 66 to 77?
brandon.
From the Cummins Manual in the 2001 FSM:
"Cylinder Head—Bolts
Step 1 59 ft/lbs
Step 2 77 ft/lbs
Step 3 Verify 77 ft/lbs
Step 4 Rotate All Bolts 1/4 Turn"
The 1/4 turn is estimated to be around 125 ft/lbs.
I'm not sure what your Cummins shop meant when they said from 66 to 77?
brandon.
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