This web page has technical "how-to" information with photos regarding the procedures required to replace valve stem seals on a General Motors small block V8 with the.![]() Nobody wants engine problems such as oil consumption, a compression leak, valvetrain noise or an outright valve failure. So every effort should be made to make sure. Massey Harris MH33 Yesterday's Tractors for sale at discount prices. Same-day shipping and easy returns. Compare our prices! We have the right parts for your old. Valve Overhaul Kit, Less Guides - Cylinder head overhaul Kit With Inner and Outer Valve Springs. For tractor models 238, 2424, 2444, 354, 364, 384, 424, 434, 444. Valve stem seals are small relative to other gaskets and seals in an engine, but play an important role in lubrication. What makes valve stem seals different than. Technical Help . It sounds the same as a faulty U- jointwithout the ringing. The clunk occurs from too much freeplay in the differential pinions and wheels, or spidergears, which allow the axles to turn at different speeds(cornering). This type of clunk is particular to the. Tubed- type axle, as the banjo differentials often travel. To test for free play, jack up the rear end ofthe MGB and support it at the front of the leaf springswith stands. Have an associate depress the brake pedal,freezing movement of the rear drums and wheels. With thegearbox in neutral, grasp the drive shaft and rotate itthrough its free play. A movement in excess of 1/4. The rear plate is removed, twopins driven out, and the gears literally fall out of thecarrier. The washers behind the gears are renewed. ![]() Itrequires several hours for the home mechanic. REPAIR TECHNIQUE1) Loosen the left axle nut ( 1 5/1. Keep the car in gear and theright rear wheel on the ground. Remove the left rearwheel, remove the split pin, have an associate depress thebrakes o keep the hub from turning, and bread the nutloose. Do not remove the nut yet. Wire Wheels - - Remove the left rear spinneror octagon nut. Drive the socket onto the nut, over thesplit pin. Have an associate depress the brakes to keepthe hub from turning, and break the nut loose (by about. Do not remove the nut yet. Remove thesocket to allow the shorn split pin ends to fall away. Jack up the rear of the car. Place jack standsat the front of the rear leaf springs, chock the frontwheels and drop the jack away. The rear axle will fall toits lowest limit. Rock the MG to ensure it is steady. Ifthe petrol tank leaks from the top, it will be necessaryto drain the tank, or preferably, reassemble and drive thecar until the tank is low on fuel. Leaking gasolene mustbe avoided. It is DANGEROUS!! Drain the oil from the differential. MGBs haveno drain plug, and the filler plug is a 1/2. Disconnecthandbrake cotter pin by removing the split pin, thenturning out with vise grips. A hammer or heat issometimes necessary to free a stubborn pin. Remove brake drum fasteners. Wire Wheels - - have an associatedepress the brakes to keep the hub from turning and removethe four 3/4. Do not round out the phillips screws!! If theywill not come free, strike the screwdriver even harder!! Back off the brake adjuster (1/4. The drum sometimes needsprying or rapping to free it. Remove the hub nut (1. It should pop free. Rarely isa hub puller needed. Remove the brake backing plate. Either. 1) Remove the straps holding the brakeline to the rear axle casing so that the plate can bepulled outwards over the end of the half shaft; or. Removing the line is more complicated,necessitating bleeding, at least. Sometimes the brakeline twists and fatigues or breaks. If the backing plateis separated from the brake line, keep the brake pedaldepressed with a stick so that the master cylinderreservoir does not empty. Remove the four 3/8 bolts holding thebacking plate to the rear axle housing (9/1. Then, rap the back side of the hub with ahammer to drive the half shaft and bearing from itshousing. Turn the hub continuously while rapping! Remove the spider gearsa) Remove the rear plate. Be careful not totwist off the brake line held at the top of the unit. Plate the handbrake cable over the top of the diff, orwire it away so it does not interfere with the internalwork. Rotate the carrier by turning the driveshaft so that the 3/1. Drive this pin out using a 5/3. IT MUST NOT BE REUSED!! Again rotate the carrier so that the rollpin end of the pinion pin is angled forwards. Use a largepunch (3/8. Grasp the end of thepin with vise- grips TIGHTLY!, then twist and withdraw. The pinion pin is hardened and the vise- grips should notdamage the surface. Remove the four gears and four washers. Often, the differential wheel washers have disappearedaltogether. Prepare and Clean the Parts. Hold the new roll pin (3/1. If a bench vise is not available, hold the pinvertically in vise grips and frill downwards onto a blockof wood. Clean the old gasket from the differentialand rear plate. A hand held propane torch will warm theplate sufficiently to allow the gasket to easily peelaway. Replace the hub seal into its housing, if anew seal is fitted. Use a liberal amount of grease on theinside of the housing and the outside of the seal tofacilitate installation. Tap the new seal into placeusing a wide faced hammer, or using a block of wood tokeep the seal parallel with the housing base. Replace the spider gears. Liberally grease the new washers and gears,and place the differential wheels into the carrier. Place the differential pinions onto thedifferential wheels, directly opposed, washers on thegears, and rotate the gears/washers so that the holes inthe pinions line up with the pinion pin holes in thecarrier. Replace the pinion pin, ensuring that theroll pin holes are aligned. Drive the roll pin through the carrier andpinion pin. Use the large punch. Fit the 7/6. 4 x 2. This extra thicknessdramatically increases the shear strength of the roll pinand prevents the pinion pin from rotating and breakingloose. THIS STEP IS IMPORTANT!! Refit the back plate and gasket, usingsilicone RTV sealant - - but use a thin film only. Refit the half shaft and brakes. Drive the half shaft and bearing into thedifferential housing. Position the castle hub nut on thehalf shaft so the hammer damages neither the shaft nor thenut. Plate a thin coat of RTV silicone sealanton the backside of the hub cap, use the 3/8. Reconnectthe brake lines and refit the brake line straps. Refit the hub, cone washer, and nut. Fit the brake drum and tighten screws (discwheel) or nuts (wire wheel) and adjust brakes. Bleed the brakes if necessary. Have an associate depress the brake pedaland tighten the drum nuts or screws. Reconnect the handbrake cable (cableadjustment may be necessary. Refill the differential. Fill only until the oilis felt on the finger. The MGB should be level whenfilling, so leave the filler plug out until the car againsits on the lever. Refit the left wheel and drop the MGBto the ground. Allow the excess oil to drain from thefiller hole. It is better to be a bit too low than a bittoo high when refilling the differential. Jack up the left rear, leaving right rear on theground, and depress the brakes. Remove the disc wheel orwire wheel spinner or nut, and tighten the hub nut TIGHTso that the split pin holes align with the castle nut. Fit and splay the split pin. Fit the differential fillerplug. Refit the left rear wheel and set again on theground. Test the brakes and drive away WITHOUT theclunk!!! ANTI- CLUNK TOOL KITJACKJACK STANDS (PAIR)LUG WRENCH or WHEEL NUT SPANNER3/4.
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