Cat 3116

JEM Y CIA LTDA

ENGINE CAT 3116
Head Installation

The head gasket I used here is thicker because the block deck was machined. The piston potrusion must be between .020 and .035 in. Using a depth guage I had a reading of .038 in. so the thicker gasket was required.

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JEM Y CIA LTDA When Installing the cylinder head on our 3116 Diesel Engine we must make sure to perform the propertorque sequence. The normal sequence is an alternating pattern starting at the center of the head. This is a universal pattern no matter what engine model you are working on. The large bolts are torqued first at 45 ft. lbs. then 320 ft. lbs. Check again at 320 ft. lbs. {there is a + or - 15 ft. lbs.} I stick to 320.

Torquing up to 320 ft. lbs. requires a 3/4 drive torque wrench. The smaller boltsare torqued to 45 ft. lbs. once the main head bolts have been torqued. The threads and underside of the head bolt shoulders have to be lightly lubricated with engine oil before installation.

CAT 3116 – CRANKSAFT INSTALLATION AND MAIN BEARING. Cat 3116 Diesel Engine Rebuild: Today we started assembling the Cat 3116 engine that failed back in June. It was put off until now for various reasons sowhen time permits and nothing else major happens the assembly process will continue. The block has been machined and new sleeves pressed in the bores. The Cam Bushings were installed by the machine shop as well. The first thing to do is install the piston cooling nozzles {as seen above} which get Main gallery oil pressure. They are held in by M8 fasteners and the torque is 18 ft lbs. + or - 2 ft.lbs.

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JEM Y CIA LTDA

Installing The Main Bearings: The tang on each bearing makes it impossible to put them in wrong. The # 5 Main Bearing acts as the thrust bearing. The other half of each bearing set must be matched up with the corresponding bearing cap. Coat each bearing with a generous amount of Lubriplate grease {my favourite} or any other recommended engine assembly lube. Assemblygrease is a good idea if the engine will be out of service for awhile.

Install Crankshaft: Very carefully lay crankshaft into block. Give the Crankshaft a slight rotation so you know it's seated properly in the upper main bearings.

Prepare Crankshaft Main Bearing Caps: Make sure the main bearing caps are clean and install the bearings aligning reference tangs with notches in caps.

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Install and Torque Main Bearing Caps: Carefully install bearing caps, they fit snugly in block and don't need to be forced. Lubricate threads and between bolt head and flat washer of each main bearing capscrew. Torque the cap bolt on the TANG side of the bearings first and then the other side to 45 ft. lbs. {Tang is the bent out portion of each bearing used as a reference wheninstalling in the block or the cap} Recheck torque and then turn each bolt 90 degrees starting at the non- tang side of each Main Bearing then move to the tang side. Above you can see we are using a Torque Angle Guage from Snap-On tools. Finally finish off by checking the end play of the Crankshaft with a magnetic base dial indicator which should read between .003 and .009 in.

Cat 3116 DieselEngine Piston Installation

The piston rings have been installed using a ring expander tool. The ring gaps must be positioned 120 degres apart. Lubricate piston and rings with clean engine oil and tighten ring compressor tool around piston. Lube rod bearings with assembly grease [I am using "Clevite 77" engine assembly grease for bearings/Lubriplate 105 grease is OK as well]

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JEM Y CIA LTDASlide hose over both connecting rod cap bolts to protect crankshaft journals during installation. Rotate crankshaft so rod journals for pistons to be installed is at bottom dead center. Coat cylinder with engine oil or lubriplate 105 and gently tap piston into cylinder until upper connecting rod bearing seats on crankshaft journal.

Note: Install piston with scribed cylinder number on rod and...