1989 7.3 diesel head-bolt torque specs - Diesel Forum - TheDieselStop.com
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7.3L IDI Diesels (Not Power Strokes) Technical discussion of topics related to vehicles powered by the 7.3 Liter In-Direct Injection Navistar engines.

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Old 03-16-2006, 08:18 AM   #1 (permalink)
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1989 7.3 diesel head-bolt torque specs

First timer here helping a buddy of mine change out the head gaskets on his '89, does anyone know torque on the head bolts, or direct me somewhere to find out?
I do not know if I heard this right, but someone said the intake manifold does not have to be taken off to change the heads out, is this right or just wishful thinking? Thanks for any help gentlemen.

Kirk Allen Jorden
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Old 03-16-2006, 11:48 AM   #2 (permalink)
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Re: 1989 7.3 diesel head-bolt torque specs

Torque the head bolts in three steps. First is 65 ft/lb, then 90 ft/lb and finish with 110 ft/lb. I don't think the intake will levitate, so you will need to remove it first. Sorry, Tim
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Old 03-16-2006, 09:38 PM   #3 (permalink)
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Re: 1989 7.3 diesel head-bolt torque specs

Don't you do the first two in a step sequence,and the last step in a line sequence? I did mine this way 40) step 70(step (80) step and 80 line. That was for a 6.9 though...you def need to torque to 110 ft-lbs(bigger bolts) also buy at least the Haynes or Chilton's manual and get teh sequence unless someone has an online version they'd be willing to share. Flying by the seat of your pants here is something you do not wnat to do.
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Old 03-17-2006, 04:03 AM   #4 (permalink)
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Re: 1989 7.3 diesel head-bolt torque specs

Sent you an email with some info.............
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Old 03-17-2006, 06:09 PM   #5 (permalink)
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Re: 1989 7.3 diesel head-bolt torque specs

You are correct J.D. The first two steps are torqued in a way that starts from the center and works outward. Then, the third step is done in the line sequence, then repeated. I didn't mean to cause any confusion. Tim
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Old 03-17-2006, 11:36 PM   #6 (permalink)
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Re: 1989 7.3 diesel head-bolt torque specs

You didn't say anything incorrect, just wanted it to be clear for the newbie. I must have checked, double checked, triple checked my manual and with the guys here plus borrowed a decent torque wrench to make sure I got this part right when I did my heads. Pulling those heads without untorquing them right and not torquing them back just right is a great way to be buying new heads!
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