This article is intended to bequeath a adequate procedure for the rebuilding of a Ford 5.0 or 302 cubic inch engine. Ensue these procedures in their entirety and the finished product Testament be as favorable, whether not exceptional, then the early. The price Testament be speedy to 1/3 of a modern or already rebuilt engine and latest 200,000 miles plus. You Testament be appreciative of the character you keep produced.
Instructions
1. Tear the engine down to the naked block. Fabricate sure that you convert the rod caps on the alike rod that they came from. Practise a box, or more useful still, prompt a milk carton and speck it for the relation to the cylinders. You yearning the rockers to pep on the corresponding spot they came off of by reason of they include developed a wear figure.
2. Receipts the short block, the heads, Eccentric person, and the pistons to the appliance shop. This is what you demand to acquaint them to engage in:
A] Fevered vat the short block. This Testament Disinfected gone the oldness of sludge and rust buildup in the engine and Disinfected gone all the oil passages that are not accessible so that you restore the oil energy to recent.
B] Magnuflux the block for cracks, Muzzle it 30 thousandths over, install the cam bearings and brass freeze plugs. The brass plugs are pennies another however Testament not rust away compatible steel.
Wipe off any excess.4. Turn the block upside down and install the main bearings. Coat them with STP oil treatment on the surface side prior to installation of the crank.
Provided the machinist says that they occasion to be decrease, petition how yet needs to be chop. Whether he says anything over ten thousandths, then you thirst for a just out Eccentric person. Cranks come with a durable manage on the diary surfaces to brew them insolvable and arduous to scratch. Once the machinist cuts over ten thousandths off, he has removed the toughride. The Eccentric person Testament scratch and groove even easier when the oil is soil and lower the entity of the bearings by at least 30 to 40 percent.
E] Install 9.5:1 Apartment lodgings top hypereutectic pistons on the rods and immensity them to the Eccentric person. Over bit, the rods swell elsewhere at the studs, causing the rods' magazine caps to be out-of-round and exert uneven vigour on the bearing.
F] Arouse the leading and rod bearings that the machinist has mean business for your Eccentric person very as the rings for the pistons.
3. Wash the block with dishwashing soap to receive all the fillings and residue from the drab process out. Blow it off with an air gun and then spray WD40 silicone on the block's interior surfaces to prevent rust.C] Achieve a valve labour to the heads to contain modern valve springs, knurl or modify the valve guides, reseat the valves, install contemporary bronze valve seats for the unleaded fuel onliest whether needed, surface the heads, research them for cracks before the business is done and, Last of all, you wish Ford Parasol seals for the valves instead of o-rings. The Parasol seals are a metal cover-like a thimble with the rubber inside. They persist longer than o-rings.D] Probation the Eccentric person for cracks and beam whether the journals demand to be reduce for smoothness.
5. Install the crank gently so as not to gouge the bearings. Install the bearing caps in their proper order by the numbers on the caps. Torque them down in two progressions starting with 40 foot pounds and then to the recommended torque. Always start at the middle cap and work outward in both directions. Once installed, check for end play due to a bad or undersized bearing by using a screw driver and force it back and forth. There should be barely any play. Now, install the rear main seal with a little engine oil on the lip of the seal. Turn the crank to insure it rotates smoothly.
6. Submerge all of the lifters in oil for at least two hours to receive all the air out, and charge them with oil prior to their installation.
7. Turn the engine upright for the installation of the camshaft. Install the cam pulley on the cam and coat all the lobes with STP. Very carefully install the cam so that you do not damage any of the cam bearings.
8. Install the timing chain after dipping it in oil and wiping it off. Make sure that the timing marks are aligned. Install the timing cover with the use of a light coat of RTV on both sides of the gasket.
9. Install the rings on the pistons using a ring installer for the two top compression rings. It is very important to install the rings in this manner: the ring gaps must be opposite of each other and away from the side of the piston's pin. Starting at the bottom ring's groove, install the first of three oil rings. The first oil ring is solid, and the gap should be ideally 30 degrees away from the piston pin. Now, place the spring spacer ring with the groove opposite the first ring. Install the third solid ring with the gap 30 degrees off the pin opposite of the bottom ring. This entire procedure is to eliminate any possibility of blowby. Install the second ring (with the dot up) with the ring installer keeping the gap in the middle of the piston away from the pin and opposite the top of the last oil ring. The last ring is installed in the same manner but opposite the last rings installed.
10. Coat the cylinder wall with STP. Install the rod bearings on the rods one at a time and put a piece of hose on the rod bolts so you don't scratch the cylinder walls. Put STP on the bearings. Install the ring compressor on the piston so that the bottom of the installer is just lower than the ring. Pour oil on the rings before installing the ring compressor. Stare at the piston top and make sure that it is in the correct position---it should face forward to the front of the engine. There is usually a mark on top of the piston toward the front. Also, make sure the piston is on the right side by the orientation of the rod to journal. They will only fit one way or the rods will be to tight. Each piston rod must face the side of the journal with broad side toward the journal. Install the pistons, making sure the rings don't come out of the compressor while you install them. Put STP on the bottom bearing and make sure the cap goes on right by being sure the crimped edges of the bearings are on the same side. Torque the rod caps to the correct torque.
11. Replace the accessories in the reverse order they came off.
