D-19 diesel head

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   I have torqued the head on my d-19 diesel , do i need to re-torque it after it runs? If so do i re-torque when it is still hot or after it cools? Also how long is the exhaust stack supposed to be originally?

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c linn Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 20 Jan 2010 Points: 25	Post Options Post Reply Quote c linn Report Post Thanks(0) Quote Reply Topic: D-19 diesel head Posted: 07 Feb 2010 at 11:31am
	I have torqued the head on my d-19 diesel , do i need to re-torque it after it runs? If so do i re-torque when it is still hot or after it cools? Also how long is the exhaust stack supposed to be originally?

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firebrick43 Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 10 Dec 2009 Location: Warren County Points: 592	Post Options Post Reply Quote firebrick43 Report Post Thanks(0) Quote Reply Posted: 07 Feb 2010 at 12:36pm
	Did you torque them correctly the first time, according to the manual? If so you shouldn't need to do it the second time. Don't ever torque bolts on a hot engine, unless the manufacture tell you to. If you have head gasket problems, your head is not straight, your top deck is not straight, or maybe your bolts have been stretched beyond yield strength and need replaced, torquing bolts more won't solve any problems, just create more. Also many, many, many torque wrenches are out of spec(get it calibrated at least once a year if used frequently, dropped or abused), and you shouldn't use a torque wrench in the bottom or top 15 percent of its range Edited by firebrick43 - 07 Feb 2010 at 12:44pm

c linn Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 20 Jan 2010 Points: 25	Post Options Post Reply Quote c linn Report Post Thanks(0) Quote Reply Posted: 07 Feb 2010 at 1:11pm
	Yes we torqued them to allis specs. the allis manual says to re-torque after it reaches operating temp. i figured it was after it cooled just wanted to double check. What abouy the stack length?

ac_bowsers Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 12 Sep 2009 Location: Northern IL Points: 251	Post Options Post Reply Quote ac_bowsers Report Post Thanks(0) Quote Reply Posted: 07 Feb 2010 at 4:36pm
	My Allis Manual said the same thing about re-torque on the gas engine (D19) when we overhauled it. I checked them after we had it on the dyno. I would say 95% of the bolts were dead on, only a few moved a little to reach required torque. My theory, if a factory repair book gives you specific instructions go by them, then you will never second-guess yourself.