![]() Sure to lubricate the bolts in clean engine oil before installing them into the head. Use TTY or Torque to Yield head bolts meaning they stretch during torqueing and cannot be used twice. ![]() Be sure to buy new head bolts as many manufacturers Installing the head bolts to make sure it doesn't move. The gasket and block, if needed have someone assist with this process as the head can be heavyĪnd you don't want to scratch anything or drop it! Once the head has been placed you will want to start With the gasket in place you can set the cylinder head onto Something I usually do is spray down the head gasket with some engine copper spray from permatex which you canįind here, this ensures that any gaps that could be present between the 2 surfaces gets filled with theĪlso helps to transfer heat between the 2 metals. Once everything is ready youĬan install the head gasket onto the engine block by aligning the alignment dowels. Locations, typically this means putting the #1 piston to TDC or Top Dead Center. Much the same you have to set the pistons to their correct To set the camshafts to their correct positions to prevent any valves from hitting pistons during installationĪnd torquing of the head bolts. The first thing you must do when installing cylinder heads is to ensure both the block and head surfaces areĬompletely clean from dust, oil, and any debris. To ensure all pistons move smoothly in and out of their cylinders and nothing binds.Įxplorer 3.5L DOHC Connecting Rod Torque Specs : 17 ft-lbs + 32 ft-lbs + 90° Rod bolts to 17 ft-lbs then 32 ft-lbs and finally a 90 degree turn for each bolt while doing them in series. Once installed you can match the connecting rod caps with the correct rods and start to torque the connecting Or mark is facing the front of the engine and that you don't scratch the cylinder. The piston can now be lowered into the cylinder, make sure the dot Once the rings have been installed you can now fit the connecting rod bearings into the end capsĪnd lube them up with oil or lithium grease. Each ring manufacturer is different so be sure to check for your The instructions given with the new rings. Positions, this can be determined by looking at Make sure to put the correct rings in the correct Not to stretch the rings or break them during installation. ![]() To install the pistons and connecting rods you must first install the piston rings into each piston. We can install the main bearing cap support brace which is placed on top of the bearings and tightened down in sequence starting at 15 ft-lbs and thenĪn additional 180 degree turn or half a turn.Įxplorer 3.5L DOHC Main Cap Torque Specs : 44 ft-lbs + 90°Įxplorer 3.5L DOHC Main Bearing Side Bolt Torque Specs : 33 ft-lbs + 90°Įxplorer 3.5L DOHC Main Support Brace Torque Specs : 15 ft-lbs + 180° Once finished make sure to turn the crank over to ensure there is no binding and that it rotates smoothly. To 33 ft-lbs and then an additional 90 degree turn. These should be tightened down in a sequence starting from middle to the outside and torqued Which aid in holding down the main bearing caps. On this engine there is additional side bolts Then on the second pass you can go an additional 90 degrees in the same pattern as before. The first being 44 ft-lbs starting from the middle and going outwards. Once prepared you can place the caps onto the crankshaftĪnd begin tightening the bolts down in a multi stage process. The 3.5L engine block main bearing caps should be inspected for any defects or flaws before installation.īe sure to lubricate the bearing surfaces prior to installation.
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