The first step is to 53 in-lbs and then the second is to 12 ft-lbs. With all of them hand tighten you can begin to torque them starting from the inside and going out.
#01 ford explorer fuel pump replacement install
Once lubed place the camshaft into placeĪnd install the camshaft caps and hand tighten. Now that the heads are installed you can place in the oiled up rockers and lube up the camshaft journals. With both timing systems in place you can move to installing the cylinder heads and then return here to finish the timing chains. You can then move to the other side of the engine and install this set of timing chain and sprockets the same way as the other and tighten down the retaining bolt. The guides for this chain can be torqued down to 15 ft-lbs. That installed you can now put in place the jackshaft sprocket and chain. There is a retaining bolt that can be tightened to hold the assembly into place. For installation though you start by installing the rear timingĬhain and sprockets into the engine block. Much more difficult as you need to access the rear of the engine. In other words each heads timing chain is located at a different side of the engine. That runs through the middle of the engine and controls a timing chain in the front and in the back of the engine.
The timing system on the Ford 4.0 SOHC is different from many other engines. You can now move to intalling the timing.įord Explorer Cylinder Head Torque Specs : 25 ft-lbs + 90° + 90° After torquing the heads are completely installed and Then you must again torque them toģ0 ft-lbs and add 90 degrees then an additional 90 degrees for a total of 180 degrees after theģ0 ft-lbs but by going through each bolt with each step.
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Then an additional 90 degrees then requires you to back them off a full turn. Head bolts have a multi-step process for torqueing. Once all the head bolts have been installed and finger tightened you can start the torqueing process, almost all 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.įord Explorer Connecting Rod Torque Specs : 15 ft-lbs + 90° Rod bolts to 15 ft-lbs and then an additional 90 degrees. 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.
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