{"id":411,"date":"2018-03-19T17:47:33","date_gmt":"2018-03-20T00:47:33","guid":{"rendered":"http:\/\/www.nickpisca.com\/diesel\/?p=411"},"modified":"2019-03-04T11:12:12","modified_gmt":"2019-03-04T19:12:12","slug":"7-3-idi-torque-specs-and-bolt-dimensions-with-images","status":"publish","type":"post","link":"https:\/\/www.nickpisca.com\/diesel\/engine\/7-3-idi-torque-specs-and-bolt-dimensions-with-images\/","title":{"rendered":"6.9 & 7.3 IDI Torque Specs and Bolt Dimensions, with Images"},"content":{"rendered":"

There are lots of information on the internet and in service manuals about the IDI torque specs.\u00a0 When I rebuilt my engine in 2018<\/a>, I thought of a more graphical way of representing the torque, bolt sizes, and bolt threads.\u00a0 This is good information if you lost a bolt, mixed up some, were looking for a replacement, or wanted to know some of the details about a part of the engine without scouring an esoteric service manual or grainy picture on the web.<\/p>\n

 <\/p>\n

Table of Contents:<\/strong> (click to jump to the section below)
\n1.)\u00a0 Standard Torque Chart<\/a>
\n2.)\u00a0 Thread Preparation<\/a>
\n3.)\u00a0 6.9 & 7.3 IDI Front (Cover) Plate and Water Pump Bolt Torque, Size, and Thread Identification<\/a>
\n4.)\u00a0 7.3 IDI Head\u00a0Bolt and Stud\u00a0Torque Sequencing<\/a>
\n5.)\u00a0 7.3 IDI Bottom of Engine Related Torque Specs<\/a>
\n6.) 7.3 IDI (and some 6.9) Top-of-Cylinder-Head Torques and Sequences<\/a>
\n7.) 6.9 & 7.3 IDI Intake & IP Gearhouse Torque Specs and Sequencing.<\/a>
\n8.)\u00a0 Various Driver Side Engine Torque Specs:<\/a>\u00a0(Oil Cooler, etc)
\n9.)\u00a0 Various Passenger Side Engine Torque Specs:<\/a>
\n10.)\u00a0 Miscellaneous Torques:<\/a>
\n11.)\u00a0 Oil Pump Bolt Information:<\/a>
\n12.)\u00a0 Oil Cooler Assembly Bolt Information:\u00a0 (Truck)<\/a>
\n13.)\u00a0 Oil Cooler Assembly Bolt Information:\u00a0 (Van)<\/a>
\n14.)\u00a0 Oddly-Named Torques:<\/a>
\n<\/a>
\nStandard Torque Explanation:<\/strong>
\nFirst off, if you don’t already know, there is a baseline torque convention called the “Standard Torque.”\u00a0 For a typical metal thread, there is a corresponding torque limitation.\u00a0 This applies for general steel bolts and nuts, but many other metals and grades of steel require a higher or lower torque spec<\/strong>.\u00a0 Never assume the torque is “standard.”\u00a0 Always verify before torquing down.\u00a0\u00a0To determine the thread size, use this kind of tool<\/a>.\u00a0 The Standard Torque Chart is:<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Thread Size<\/th>\nCorresponding Standard Torque<\/th>\n<\/tr>\n
1\/4″-20<\/td>\n7 ft-lbs<\/td>\n<\/tr>\n
5\/16″-18<\/td>\n14 ft-lbs<\/td>\n<\/tr>\n
3\/8″-16<\/td>\n24 ft-lbs<\/td>\n<\/tr>\n
7\/16″-14<\/td>\n38 ft-lbs<\/td>\n<\/tr>\n
1\/2″-13<\/td>\n60 ft-lbs<\/td>\n<\/tr>\n
9\/16″<\/td>\n80 ft-lbs<\/td>\n<\/tr>\n
5\/8″<\/td>\n115 ft-lbs<\/td>\n<\/tr>\n
3\/4″<\/td>\n200 ft-lbs<\/td>\n<\/tr>\n
7\/8″<\/td>\n320 ft-lbs<\/td>\n<\/tr>\n
1″<\/td>\n480 ft-lbs<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>
\n<\/strong><\/p>\n

Thread Preparation:<\/strong><\/p>\n

\"\"<\/a>Second, ALWAYS\u00a0CHASE your threads<\/a> prior to any engine reassembly.\u00a0 Do not use a short cut like a tap-and-die set.\u00a0 It could damage the block.\u00a0 Also, for major fasteners like crank main bolts and head studs, use ARP fastener lube to ensure precise torque measurement.
\n<\/a><\/p>\n

 <\/p>\n

6.9 & 7.3 IDI Front (Cover) Plate and Water Pump Bolt Torque, Size, and Thread Identification<\/strong>:
\nAll front (and rear) plate torques are standard torque for 5\/16″-18, which corresponds to 14 ft-lbs.<\/p>\n

\"\"<\/a>
\n<\/a><\/p>\n

 <\/p>\n

7.3 IDI Head\u00a0Bolt and Stud\u00a0Torque Sequencing.\u00a0\u00a0<\/strong><\/p>\n

The 6.9 head bolt\u00a0and stud has a 7\/16″ bolt diameter with 14 threads per inch.\u00a0 The 7.3 bolt\/stud\u00a0has 1\/2″-13 threads.<\/p>\n

\"\"<\/a><\/p>\n

(Note, I have torqued my 7.3 ARP studs down to 150<\/a> and 140<\/a> ft-lbs, from the advice of R&D IDI Performance.\u00a0 Read the links for more information.<\/em>)
\n<\/a><\/p>\n

 <\/p>\n

 <\/p>\n

7.3 IDI Bottom of Engine Related Torque Specs:<\/strong><\/p>\n

The following image explains all the oil-pan, oil-pump, crankshaft main, and rod cap bolt dimensions and torques.<\/p>\n

\"\"<\/a>
\n<\/a><\/p>\n

 <\/p>\n

7.3 IDI (and some 6.9) Top-of-Cylinder-Head Torques and Sequences:<\/strong><\/p>\n

For the most part, the image below works for 7.3 and 6.9, but some engines have a slightly different rocker arm (aka Valve Lever) retainer setup, but I think the torques for them are the same regardless.<\/p>\n

\"\"<\/a>
\n<\/a>
\n6.9 & 7.3 IDI Intake & IP Gearhouse Torque Specs and Sequencing.<\/strong><\/p>\n

\"\"<\/a><\/p>\n

 <\/p>\n

 <\/p>\n

<\/a><\/p>\n

 <\/p>\n

 <\/p>\n

Various Passenger Side Torque Specs:<\/strong><\/p>\n

\"\"<\/a>
\n<\/a>
\nVarious Driver Side Torque Specs:<\/strong><\/p>\n

\"\"<\/a>
\n<\/a><\/p>\n

 <\/p>\n

Miscellaneous torques:\u00a0\u00a0<\/strong>(Taken from the Official Ford “1988-1993 Engine Service Manual, Supplement 7.3 Liter Diesel Engine” and the Official Ford “1988 Truck Shop Manual, Vol. A, Bronco, Econoline, F150-350, Superduty.”)<\/em><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Type<\/th>\nMax Torque<\/th>\nBolt\/Nut\u00a0Size<\/th>\nQty<\/th>\n<\/tr>\n
Crankshaft Harmonic Balancer Retaining Bolt<\/td>\n90 ft-lbs<\/td>\n5\/8″-11<\/td>\n1<\/td>\n<\/tr>\n
Camshaft Screw<\/td>\n15 ft-lbs<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
Torque Converter Nuts (C6)<\/td>\n<\/td>\n3\/8″-16<\/td>\n4<\/td>\n<\/tr>\n
Air Cleaner Stud Adapter (loctite)<\/td>\n45 ft-lbs<\/td>\n<\/td>\n\u00a01<\/td>\n<\/tr>\n
Flywheel Mounting bolt (loctite)<\/td>\n47 ft-lbs<\/td>\n\u00a03\/8″-16 1-3\/4″<\/td>\n\u00a09<\/td>\n<\/tr>\n
Oil Pan Drain Plug<\/td>\n28 ft-lbs<\/td>\n<\/td>\n\u00a01<\/td>\n<\/tr>\n
T-stat Housing Bolts<\/td>\n20 ft-lbs<\/td>\n<\/td>\n\u00a02<\/td>\n<\/tr>\n
IP Gearhousing bolts (apply RTV)<\/td>\n14 ft-lbs<\/td>\n\u00a03\/8″-16, (2) 4″ & (2) 1-3\/4″<\/td>\n\u00a04<\/td>\n<\/tr>\n
IP Gear-to-IP-Shaft bolts (12-pt head)<\/td>\n25 ft-lbs<\/td>\n\u00a0(3) 12-pt 5\/16″-24, 3\/4″<\/td>\n\u00a03<\/td>\n<\/tr>\n
IP Pipe Nut<\/td>\n22 ft-lbs<\/td>\n\u00a09\/16″ hex 3\/8″-16<\/td>\n\u00a03<\/td>\n<\/tr>\n
VRV-to-IP Mounting Screws<\/td>\n75-90 in-lbs (8-10.5 N-m)<\/td>\n<\/td>\n\u00a02<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

<\/a>
\nOil Pump bolt information:\u00a0\u00a0<\/strong><\/p>\n\n\n\n\n\n
Type<\/th>\nMax Torque<\/th>\nThread Size<\/th>\nQty<\/th>\n<\/tr>\n
Pump mounting bolts (to block)<\/td>\n14 ft-lbs<\/td>\n5\/16″-18 x 1-1\/2″<\/td>\n3<\/td>\n<\/tr>\n
Pump pickup tube bolts<\/td>\n14 ft-lbs<\/td>\nUpper:\u00a0 5\/16″-18 x 2″
\nLower: 5\/16″-18 x 1 1\/2″<\/td>\n		2<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

<\/a>
\nOddly-Named Torques:<\/strong><\/p>\n