slammed98z
Well-Known Member
- Joined
- January 20, 2009
- Messages
- 175
- Reaction score
- 1
- City, State
- Branson West, Missouri 65737
- Year, Model & Trim Level
- 1996 Explorer 2DR
Finally got around to tearing into my 1996 4.0 OHV that has been having a fuming and dead miss.
Did the compression test last week and came up with
#1 95
#2 75
#3 0
#4 90
#5 95
#6 95
Decided to tear into the engine and see what is wrong. Here is a Complete tear down thread with as many pictures as i could take. THIS IS A VERY VAGUE WRITE UP OF THE TEAR DOWN PROCESS. FOR THE MECHANICALLY INCLINED PERSON WHO CAN FIGURE A FEW THINGS OUT ON THEIR OWN.
ENGINE IS GOING TO BE RE RINGED IN THE VEHICLE.
Step #1- Remove battery cable.
Step #2- Remove Hood by Removing 4 8mm Bolts.
Step #3- Remove the air intake system. Unplug MAF and IAT sensors.
Step #4- Drain Radiator and remove both radiator Hoses. Radiator is attached to the core support with 2 10mm bolts. I have a eletric fan, but most of you guys will need to remove the clutch fan before removing the radiator.
Step #5- Remove the accessory belt and the alternator bracket, alternator bracket is held to the head with 3 13mm bolts, Unplug the alternator and undo the 10 mm nut that holds the power wire to the back of the alternator. Then remove the 2 Heater core lines, one attaches to the intake and one to the water pump.
Step #6- Remove the A/C pump, there is 4 13mm bolts on top of the ac pump, remove the Pressure and return hoses from the power steering pump. The A/C and P/S pumps bracket is held to the head via 2 13mm nuts attached at the waterpump and 1 13mm bolt that goes into the head.
Step #7- Remove the coil pack by Unbolting the 1 13mm bolt from the head in between the middle and back exhaust ports, then remove the 2 10mm bolts from the intake.
Step #8 unplug the necessary sensors from the intake manifold which are as follows DPFE sensor and hoses, TPS sensor, Some solonid sensor, unhook the 2 vaccume lines from the rear of the drivers side of the manifold, Unhook the throttle cables and remove the throttle cable bracket. Unhook the Evap hose from the bottom of the throttle body.
This will be the aftermath of removing the intake.
Step #9 Remove all the vac plumbing as well as the engine harness which has a few plugs scattered all over the engine. Remove the fuel lines from the fuel rail.
Step #10 Remove both valve covers and rocker shafts. Be sure to loosen the rocker shafts evenly across the three bolts.
Step #11 Remove the 10mm bolts that hold the lower intake manifold to the heads.
Step #12 Remove the 2 Collector Bolts from each exhaust manifold, and then the 6 10mm bolts that hold the manifolds to the heads.
No pictures of this sorry.
Step #13 Loosen the 8 Head bolts with a T-55 torx socket. Discard the bolts, they are Stretch style. Gently pry the heads off with a flat screw driver.
MORE TO FOLLOW.
Did the compression test last week and came up with
#1 95
#2 75
#3 0
#4 90
#5 95
#6 95
Decided to tear into the engine and see what is wrong. Here is a Complete tear down thread with as many pictures as i could take. THIS IS A VERY VAGUE WRITE UP OF THE TEAR DOWN PROCESS. FOR THE MECHANICALLY INCLINED PERSON WHO CAN FIGURE A FEW THINGS OUT ON THEIR OWN.
ENGINE IS GOING TO BE RE RINGED IN THE VEHICLE.
Step #1- Remove battery cable.
Step #2- Remove Hood by Removing 4 8mm Bolts.
Step #3- Remove the air intake system. Unplug MAF and IAT sensors.
Step #4- Drain Radiator and remove both radiator Hoses. Radiator is attached to the core support with 2 10mm bolts. I have a eletric fan, but most of you guys will need to remove the clutch fan before removing the radiator.
Step #5- Remove the accessory belt and the alternator bracket, alternator bracket is held to the head with 3 13mm bolts, Unplug the alternator and undo the 10 mm nut that holds the power wire to the back of the alternator. Then remove the 2 Heater core lines, one attaches to the intake and one to the water pump.
Step #6- Remove the A/C pump, there is 4 13mm bolts on top of the ac pump, remove the Pressure and return hoses from the power steering pump. The A/C and P/S pumps bracket is held to the head via 2 13mm nuts attached at the waterpump and 1 13mm bolt that goes into the head.
Step #7- Remove the coil pack by Unbolting the 1 13mm bolt from the head in between the middle and back exhaust ports, then remove the 2 10mm bolts from the intake.
Step #8 unplug the necessary sensors from the intake manifold which are as follows DPFE sensor and hoses, TPS sensor, Some solonid sensor, unhook the 2 vaccume lines from the rear of the drivers side of the manifold, Unhook the throttle cables and remove the throttle cable bracket. Unhook the Evap hose from the bottom of the throttle body.
This will be the aftermath of removing the intake.
Step #9 Remove all the vac plumbing as well as the engine harness which has a few plugs scattered all over the engine. Remove the fuel lines from the fuel rail.
Step #10 Remove both valve covers and rocker shafts. Be sure to loosen the rocker shafts evenly across the three bolts.
Step #11 Remove the 10mm bolts that hold the lower intake manifold to the heads.
Step #12 Remove the 2 Collector Bolts from each exhaust manifold, and then the 6 10mm bolts that hold the manifolds to the heads.
No pictures of this sorry.
Step #13 Loosen the 8 Head bolts with a T-55 torx socket. Discard the bolts, they are Stretch style. Gently pry the heads off with a flat screw driver.
MORE TO FOLLOW.
