After all the machining is performed, the engine can be reassembled in the reverse order that it was torn down.
Of course, I encourage you to follow traditional engine building practices. Clean all sealing surfaces before assembly and installation of any gaskets or sealant, and remember to lubricate all the engine’s internal moving parts and bearings during reassembly.
This Tech Tip is From the Full Book, HOW TO REBUILD FORD POWER STROKE DIESEL ENGINES 1994-2007. For a comprehensive guide on this entire subject you can visit this link:
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Step-1: Paint the Block
After machining and cleaning the block, mask off all of the internals of the block and paint the block. VHT Paints (a division of Duplicolor) offers a wide range of colors for a variety of applications. The paint is very durable and stands up to the high heat of Diesel components.
Step-2: Reinstall Galley Plugs
One of the critical things to do at this time is to make sure all of the galley plugs that were removed to clean the block passages are reinstalled.
Step-3: Install Cam Bearings
At this time, new cam bearings can be installed. When tearing down a Diesel you may notice that all the cam bearings look worn down to the copper layer of the bearing. This is normal and a lot of re-builders choose not to replace the cam bearings unless the engine was exposed to other detrimental issues.
Step-4: Prepare Oil Cooler Assembly
Take apart, clean, and re-seal the oil cooler. Take the time to paint the oil cooler with VHT paint also.
Step-1: Check Bearing Clearances
In order to perform the proper rebuild, check the bearing clearances. Main bearing clearance should be somewhere between .002 to .0035 inch.
Step-2: Choose Engine Bearings (Torque Fasteners)
ACL bearings have provided quality bearings for the OEMs for more than 50 years. For the Power Stroke engine, ACL offers a Duraglide series, which is manufactured of copper, lead, and tin for heavy-duty service and wear.
Step-3: Install Piston Oilers
Before installing the crankshaft, make sure to install the piston oilers in the main webbing of the block. Apply Loctite 271 to the threads of the bolts to properly secure them.
Step-4: Install Crankshaft
Install the crankshaft and properly torque the main bearing bolts.
These examples give you an idea of how much material on each end of the connecting rod was removed in order for the assembly to be balanced.
Step-1: Install Pistons on Rods
Lubricate the wrist pins with oil and assemble the pistons to the rods. Make sure to place the piston bowl toward the cam side for the 7.3.
Mahle pistons are provided with Perfect Circle rings. Perfect Circle has been manufacturing rings for heavyduty applications for more than 30 years. The top ring is barrel-faced for better seal and quicker breakin, the second ring is a reverse twist for better oil control, and the oil ring is chemically polished for better oil drainback and has a 20-degree gear angle to ensure side seal. All rings are packaged for their correct location on the piston.
Step-2: Inspect Ring Gap
Before installing the rings onto the pistons, take the time to make sure the rings are properly gapped for the application. Rings are packaged with information regarding the acceptable clearance.
Step-3: Verify Bearing Clearance
A cheap way to ensure the proper bearing clearance is to use an inside micrometer. This can be used to measure for proper bearing clearance.
Step-4: Install Pistons
Install the piston rings onto the piston and lightly oil them. Place the rings in the proper position on the piston and install the pistons in the bore with a piston ring squeezer.
Camshaft and Lifters
Step-1: Install Camshaft
Install the camshaft into the block and line up the marks on the camshaft with the crankshaft.
Step-2: Install Lifters and Hold-Downs
After the camshaft is installed and aligned with the crankshaft, the lifters and the lifter hold-downs can be installed in the block. Use Loctite 271 on the threads of the lifter hold-down bolts.
Step-1: Reassemble Valvesprings
Luricate the valve stems with oil and insert the valves into the heads. Install new seals and reassemble the valvesprings.
Step-2: Select Head Bolts (Save Money)
A head bolt for the Power Stroke engine is called a “torque-to-yield” bolt. Once removed, factory bolts can no longer be reused. Over a period of time, these “torque-toyield” bolts fatigue and cause the head gasket to fail, especially on the 6.0. Instead of purchasing replacement head bolts and to ensure the maximum clamping load to the head gasket, I recommend the use of ARP head studs. ARP also manufactures bolts from the same quality of steel that is used in its studs for a wide variety of applications.
Step-3: Install Cylinder Heads and Pushrods
Install the cylinder heads and torque the studs to ARP recommendations. The studs do not torque the same as the factory head bolts. Once the heads are installed and properly torqued, install the pushrods.
Step-4: Install Rocker Arm Stand
Install the rocker arm stands onto the cylinder heads. Make sure to lubricate the rocker arm ball and pushrod with oil.
Step-5: Install Glow Plugs
Install the glow plugs into the cylinder heads making sure to coat the threads with Loctite (PN 77164) highnickel anti-seize lubricant.
Step-6: Install Plugs into Galley (Torque Fasteners)
At this time, install new plugs into the galley of the front and rear of the cylinder heads for the highpressure oil passages. These plugs need to be ordered from Ford (PN 4C3Z-6026-CA). Apply Loctite 271 to the threads and torque the plugs to 60 ft-lbs.
High-Pressure Oil Pump (HPOP)
Step-1: Install Gaskets
When installing the new gaskets onto the front cover, you will notice that there is a trough in the front cover that needs to be filled with a small amount of gasket sealer. After applying the sealer, install the front cover onto the front of the engine. The front cover of the engine was previously cleaned and then painted using VHT aluminum spray paint.
Step-2: Insert HPOP Gear
Insert the gear for the HPOP into the top of the front cover.
Step-3: Install HPOP
Install the HPOP in the back of the front cover while positioning the gear over the shaft of the pump.
Step-4: Install Drive Gear Bolt (Torque Fasteners)
Install the HPOP drive gear bolt through the front cover and thread into the HPOP. Torque the bolt t 90 ft-lbs.
Step-5: Install Reservoir
Insert a new gasket into the base of the HPOP reservoir and install the reservoir onto the top of the front cover.
Step-1: Install Oil Cooler
After the exhaust manifolds were blasted, they were painted with high-heat cast-iron paint from VHT and secured to the block with new ARP stainless-steel bolts. The oil cooler can be installed at this time also.
Step-2: Install Oil Pump Gear
When installing a brand new oil pump from Ford, make sure that the word “OUT” is not facing the inside of the front cover as this picture represents. The word “OUT” on the pump needs to face the inside of the oil pump or damage to the front cover occurs.
Step-3: Install Galley Plug
Make sure the galley plug is installed in the rear of the block beside the camshaft before installing the rear cover.
Step-4: Clean Rear Cover
Clean the rear cover and apply sealer around the edges of the cover along the bolt holes. This is the only way to seal the rear cover; there is no gasket.
Step-5: Install Rear Seal (Special Tool)
The rear seal needs to be installed. This requires a special tool in order to install it with a wear sleeve. The tool can probably be leased from your nearest parts store. If you choose to purchase the tool from OTC, the price is around $700.
Step-6: Install Oil Pump Pick-Up Tube
The oil pump pickup tube can now be installed to the front cover.
Step-7: Install Oil Pump
Sealed Power makes a replacement oil pump for the 7.3 (PN 224- 43626).
Step-8: Install Gaskets
Gaskets for the 6.0 are notched in relation to were they go. This makes it easy to begin placing the gasket into the component.
Step-9: Install Oil Pan
Before installing the oil pan, there is a plug on the side of the oil pan that is used to insert the oil indicator tube. Remove the plug and install a new gasket, which consists of an O-ring. This needs to be purchased from Ford (PN 3C3Z-6753-AA). Next, the oil pan can be installed using RTV sealer. This is the only way to seal the pan on the 7.3. An oil pan gasket is only offered for the 6.0 engine.
Written by Bob McDonald and Republished with Permission of CarTech Inc