So here is my question. We are doing mains and rods in a cummins n14 celect+ with ESN 11964732. Cummins quick serve online has different torque values based on ESN. my concern is the torque values do not seem right. Here is what the website says for main bearing capscrews:
1.50ftlb
2.100ftlb
3.140ftlb
4.loosen completely
5.50ftlb
6.100ftlb
7.140ftlb
8.rotate 90degrees
This just seems way to low. The older block specs had it going all the way up to 255ftlb. Also under the crankshaft section of quick serve it has completely different values for mains than the ones I just gave. They go up to 305ftlb. Any help would be greatly appreciated. I went to cummins they wouldn't help and the tech number they gave me is on vacation.
Cummins n14 ESP+ Main Bearings
Discussion in 'Trucks [ Eighteen Wheelers ]' started by surfer24, Jul 17, 2013.
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Looking at my N14 manual its says theres two diff engine specs, here you go....
Lube capscrews with 15w40 engine oil
Engines built with 1" diameter capscrews
1. 111ft/lb
2.210 ft/lb
3.306ft/lb
Loosen Completely and repeat
Engines built with 3/4" diameter capscrews
1.89ft/lb
2.170ft/lb
3.254ft/lb
Loosen completely and repeat -
That would be the specs under the crankshaft section and I will throw another curve ball. The bolts are 1 1/8"
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That last 90 degrees will add alot of torque. I just did a cam bolt on a detroit and it has a 1 1/4 head. Specs are 55 ft lbs + 120 degrees, yet by the time you're done it's probably 700 ft lbs.
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I wouldn't be surprised if you're way over 300 ft lbs.
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1. 90
2. 170
3. 255
4. Loosen and repeat.
Rods are 95 then 205. -
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That last 90 degrees will add a huge amount of torque. Do not be scared by that. If you want to check, after your 90 degree turn, set your torque wrench to 200 and check the bolts, if it clicks with no movement try 225, then 250 and so on until the bolt starts to move a bit.
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