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rafael are you sure about mi specs on my c-12 cat engine…

Customer Question
Mr. cat man i am...
Mr. cat man i am rafael are you sure about mi specs on my c-12 cat engine? ser# XXXXX hp 306.o max 415 hp 11.9 L
Submitted: 10 years ago.Category: Heavy Equipment
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Answered in 5 minutes by:
2/20/2012
Technician: Cat Man, Caterpillar Engine Expert replied 10 years ago
Cat Man
Cat Man, Caterpillar Engine Expert
Category: Heavy Equipment
Satisfied Customers: 10,344
Experience: 23 Years Caterpillar Engine experience.
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Hi. Thanks for using JA! I will try and help you out.

Yes. Why do you ask? Is there one that concerns you?
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Customer reply replied 10 years ago
I think the foot lbs are low for this c-12 on cilinder had-rods-main-injectors housing and rocker assembly.
Technician: Cat Man, Caterpillar Engine Expert replied 10 years ago
They are correct. I am positive. The head, rods, and mains use a torque then turn.

For example, the head torques to 120 foot pounds. Then you turn the head bolts an additional 90 degrees or 1/4 turn.


Are you finiliar with the torque turn method?
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Customer reply replied 10 years ago
yes. I am. can i please get the specs again. thank you!
Technician: Cat Man, Caterpillar Engine Expert replied 10 years ago

Sure. Here they are.

 

 

The rods torque to 95 foot pounds plus a 60 degree turn.

The mains torque to 70 foot pounds plus 90 degree turn.

The head torques to 120 foot pounds plus a 90 degree turn.

 

The small head bolts torque to 20 foot pounds.

The injector torques to 22 foot pounds.

The rocker arms torque to 75 foot pounds.

The jake nuts torque to 60 foot pounds.

The jake bolts torque to 41 foot pounds.

The firing order is 153624.

Cat Man
Cat Man, Caterpillar Engine Expert
Category: Heavy Equipment
Satisfied Customers: 10,344
Experience: 23 Years Caterpillar Engine experience.
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