c3 corvette pitman arm torque
35, Differential Spring Bolts Clutch pack guide8. JavaScript seems to be disabled in your browser. Excessive steering effort was relatively negated during the first 10 years of Corvette production. (Van Steel uses a special fixture to press the spindle out of the bearing support.) Then balance the valve. The large block moves up and down the shaft as the steering wheel is turned. The steering linkage must be assembled to the pitman arm, idler arm, and to the steering arms using the correct fasteners and assembly torques. Great Prices. Pump Cover Run the steering wheel lock to lock several times to bleed out air. Torque specifications for 68-82 Corvettes FT/LBS (Unless specified) Front Suspension: Rear Axle: Front Wheel Bearings 12 Differential Cover Bolts 50 Upper Ball Joint Nut 70 Driveshaft to Pinion Flange 15 Lower Ball Joint Nut 90 Differential Front Mounting Bolt 65 Ball Joint Attachment Nut 28 Steering Arm to Spindle 70 Brake System: If you pull the pitman arm, it is sometimes possible to see the twist in the sector shaft splines. Turn the wheels (off ground) right and left, lightly contacting the wheel stops. Yellow or white dye (or marking compound) is usually found in a differential kit. Thermostat 70 Whether youre maintaining your Shark Corvette or completing a full restoration, our selection of C3 Corvette Power Steering parts is unsurpassed. THE RUGGED 40 SERIES TORQUE CONVERTER is composed of heavy gauge stamped steel to withstand the extreme rigors of rough applications. If it doesnt, adjust the nut until the opening is located. Note that a shim (.028 in this case) is below the inner bearing and the driveshaft yoke has been attached to the outer part of the pinion bearing. 150 80, Connecting Rod Cap . Once the bolt is attached with the nut and washer, slowly lower the jack. It has been said you can move the world with the power of hydraulics. Put the dial indicator on zero; rock the ring gear back and forth to determine how much play it has while the pinion gear remains stationary. The relay rod connects to tie rods on both ends, and those are attached to the steering knuckles. Pump Check belt tightness and check for a bent or loose pulley. These are fairly inexpensive and it is a good idea to install fresh bump stops when putting the front suspension together. Arm Cover These springs were installed on Corvettes built at the new Bowling Green assembly plant. Make sure that they are completely seated. Come join the discussion about restorations, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more! Rod Cap The specialty rebuilders that have seen [Click here to read more], Dash Carrier Assembly Removal Count on Zip Corvette for the best quality Corvette Parts available for your 1968-1982 Corvette. Repeat above procedure until oil level remains constant after running engine. You can now use the ball joint separator to separate the spindle from the lower control arm. Simply reverse the disassembly procedure discussed in Chapter 6. Plugs 30, Strut Rod Bracket to Differential 35 Note: C4 - FRONT Bushing Clamp Bolts. Aftermarket suppliers offer a wide range of C3 Corvette shock absorbers. 30 I call it a refresh. When you disassembled the frame, you paid particular attention to how many shims were installed before removing them. Start by installing the control valve onto the end of the drag link. Filter Install the washer. 2628 Views 4 Replies 2 Participants Last post by gtr1999, Dec 13 . 27: The power steering pump was badly leaking so we asked Zip to send us a brand new one. 30, Leaf Spring Anchor Plate Clamp Notice that these rotors have been matched to the spindle for trueness with White- Out. Driveshaft and Rear Axles, Lower Control Arm Shaft Bolts Secure the lower shock with two 1/2-inch bolts and torque to 35 ft-lbs. Supporting the center of the dash is critical so as to not crack or damage it [Click here to read more], General Motors, like all the other car manufacturers of the time, did not put much valuable information on the vehicle identification number (VIN) plate. New ball joints with rubber or polyurethane bushings are included in the rebuild process. 70, Rear When you move the steering wheel left or right you are moving a control valve bolted to the pitman arm that directs hydraulic pressure to one side of the power ram (also known as a slave cylinder) at the drag link to assist steering effort. These rubber bushing are strong enough to absorb the impact under most conditions. The 3/4-inch inner camber bolt was torqued to 70 ft-lbs. The rear transverse leaf spring and spring bolts have not been installed. Use a 13/16-inch socket on the top and a 7/8-inch wrench on the bottom to tighten the bolt. Push the inner seal onto the spindle assembly. The easiest way to prepare the differential for installation is to place it onto a floor jack. Get some friends to sit on the frame as you perform the next part. Move the gears back and forth to check for looseness and play from side to side. The old shaft protruded about 1/8" past the nut and the new one sticks out just a little past flush. A 9/16x18x2532-inch bolt secures the rear lower control arm to the frame. They start the process by disassembling the old parts. It is critical to catch any imperfections on the workbench and not on the car. 25, Shock Mount Bolt (Lower) New clutches usually cure this problem. Then press the second bushing into the arm or onto the shaft. Check theside plate end play again. The rods mount under the differential and connect to the trailing arms on the same bracket as the lower shock mount. Each bolt has a wedge near the head (arrow) that prevents it from moving once the suspension has been mounted. (The front trailing arm bushings have already been installed here.). The upper control arm rubber bushing bolts should remain loose until the project has been completed. The date code is irrelevant unless youre really trying to re-create [Click here to read more], If oil is the lifeblood of your engine, then the oil pump and lubrication system are indeed the heart and circulation system of your big-block Chevy. Water Posi case2. The frame has now been completed and rolled outside for a final inspection. The idler arm provides support to the steering system and is connected to the passenger side of the frame. Shot peen the rear trailing arm until all the paint and grime have been removed. Connecting These two methods are well described and documented in the service . You have a thread showing. Particularly problematic with C2/C3 power steering systems is control valve adjustment and leak issues. 29: Start the re-assembly by installing the lower control arms first, then install the upper control arms and shims and torque the mounting bolts and nuts to specs on both control arms. 25 Use a 1/2-inch-drive torque wrench with a 7/8-inch nut and torque it to 75 ft-lbs. This is how the steering knuckle looks when it is properly secured to the upper and lower control arms. The thickest shim in your clutch pack (.045 inch) is used to ensure that the bottom part of the seal does not bottom out, which causes leakage. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Original-equipment spring rates usually give the best ride if your only intent is cruising with your restored Corvette. When all of the pressure is off the spring, pull the control arm down as far as it will go and remove the coil spring. This is a good time to refurbish or replace the steel control arms. 40: The stabilizer bar end link kits can be assembled and installed. This cutaway of a C3 differential reveals the components to inspect when the rear case cover is removed. This will make the metal contract and make installation much easier. (This will allow you to drive the car without doing any real damage to the front tires and suspension.) Universal Once they are snug go one quarter of a turn more. 50 I just installed my new power steering box and pitman arm. These bump stops play a very important role in protecting the suspension in case you hit an unexpected bump too fast and the suspension bottoms out. 04:Loosen the power steering pump hoses from the control valve and let them drain into a container. Plug The suspension must have time to settle on the springs before these bolts are tightened. Torque the two front bolts to 70 ft-lbs with a 5/8-inch socket. Profile. Once they are snug, go one-quarter turn more with a wrench. That way when the linkage is installed, the front end alignment will be close enough for you to be able to drive to your local Corvette alignment shop without doing any damage to the front end or tires. Make sure the spring is properly seated in the control arm so it does not slip. Oil Tap it several times with a mallet or hammer to make sure it is seated properly on the pinion shaft. Steering knuckle to lower ball joint: 90 Ball joint to control arm fasteners: 25 Upper control arm cross-shaft end cap bolts: 35-40 Upper control arm cross-shaft to frame: Lower control arm cross-shaft end cap bolts: 45-55 Lower control arm rear cross-shaft to frame: Lower control arm front cross-shaft to frame: Idler arm to frame: Refurbished trailing arms include new bearings as part of the price. Tighten the nuts evenly on both sides and make sure the lock washers are crushed. in/lbs, Stabilizer Bar Link nuts Five of these discs have tabs. The control arms, spindles and springs should now be in place. Leave it alone. The suspension undergoes a lot of stress, and this is the perfect time to rebuild or refurbish these parts before they are reinstalled. $14.75 shipping. (If you are using steel shims, this is not a problem.) Remove the races and seals and clean the trailing arm in a parts washer to remove the grease and grit. 30, Mount Bolts You are on the upper end of the torque range with your 150# reading. Remember to do both the upper and lower control arm bushings. When draining the oil from the differential, check for a burning odor, which indicates overheating of the gears and case. Flywheel Torque them to 30 ft-lbs. Thanks guys. 13906-C Denton Drive. This bumper is designed to hit the lower frame rail if the suspension is fully compressed; this helps avoid damaging any suspension components if a bump is taken too hard. specifications for 68-82 Corvettes, Front Wheel Bearings It is much easier to do it this way. Rear Suspension Strut Rods and Shock Absorbers. Caliper This has to be done with the weight of the car on the suspension. This would once again be a good time to solicit the help of a buddy to aid in its removal. Add or remove shims to adjust the toe-in or toe-out of the rear suspension. performance and installation facility here, 63-82 Pitman Arm To Steering Box Nut w/Washer. Lonestar Caliper Company offers a complete line of power steering parts, components, and systems for C2 and C3 Corvettes, including pulleys, power steering pump caps, power steering brackets and steering shaft couplings. A small retainer at the front of the lower frame holds both front lower control arm bolts in place. Remove the parking brake hardware (reverse the procedure that starts in Step 3). 35 If your box has high mileage and exhibits free play, it should be exchanged for a refurbished unit with new gears and original equipment adjustments. The endplay on the side yoke should be .005 to .010 inch. The block is attached to the Pitman arm gear that turns the steering system when it moves back and forth. Specs. When the ball joint is aligned, continue to raise the jack while pushing the ball joint stud through. 26: Install the new ball joints into the arms and torque them to specs. 80 Mounting Bolts Pressure Plate Notice how the end of the coil spring rests in the lower control arm. Your completed front suspension should look like this unit, which is installed on a 1980 Corvette. 20 This can be corrected with proper adjustment at the control valve via an adjustment screw with the engine running and both front tires off the ground. Chevrolet added optional power steering to the Corvette's underpinnings beginning in 1963, encompassing an engine-driven pump, pitman arm control valve, pressure and return hoses, and a power ram to provide assistance in turns. Does the new picture look ok as far as the shaft sticking thru the nut far enough? If your Corvette was not equipped with power steering from the factory, you will have to change out or add to the crankshaft pulley to accommodate the power steering pump. The second way is to do it in the car but you must remove the pitman arm and take torque measurements by placing a torque wrench on the steering wheel hub and measuring steering gear torque through the steering column. Then, service the pump to "full" on the dipstick at operating temperature and you're good to go. You use shims to make it match the desired pattern. Is your Pitman arm on upside down by chance? The C3 AIM sheet for tie rod clamping indicates that when you tighten the adjuster tube Housing Bolts (rear) 40, Front Bolt Manifolds Once the spring is securely in both wells, slowly raise the jack to prevent the spring from popping out of the upper and lower spring wells. Original-spec shocks have a service life thats at the lower range of this estimate, while premium aftermarket shocks last at the upper range. Corvette engine front accessory drive packages were revised over time as vehicle design changed. Sometimes the pitman shaft can be twisted inside the gear box. When lines are backward to the ram you steer left and the ram applies pressure right snatching the steering wheel out of your hands violently. Raise the differential and cross frame with the floor jack until you can secure it to the frame with two 5/8-inch bolts. Housing The control valve screws onto the end of the draglink. 65, Sway Bar Link Brackets: We're working with technician Paul Taylor of Hot Rods by Dean in Phoenix, who is going to walk you through the C2/C3 power steering system. The lower shaft is installed in the same manner although you will have to make another longer control arm support. I don't think it's upside down. This new design can be found in all 19801982 Corvettes. 36: With the new steering linkage assembled, measure the length of one side of the old tie rod assembly. At the time, emissions standards were tightening and General Motors was hard-pressed to increase fuel economy across the board for their production vehicles. 23: Place the control arm in the press and install one bushing using a 1 5/16 socket to press the bushing into place. To check the gear pattern, hold the yoke with one hand and turn the ring gear back and forth with the other hand and a 9/16-inch wench on the ring gear bolt. Get the best deals on Pitman & Idler Arms for Chevrolet Corvette when you shop the largest online selection at eBay.com. 25, Lower Pinion lock screw and washer4. 15, Lower Ball Joint Nut Outlet 37: Mount the entire steering linkage assembly to the steering arms and Pitman arm. Much has happened since our kick-off of the Project. The front suspension is the perfect place to start reassembling the foundation of your C3. The C2/C3Corvette has two identical tie rod assemblies that connect the left and right steering arms to the steering relay rod. A new ball joint is installed and the steel shaft receives new rubber or poly bushings. Housing Cover Confirm the drag or load on the pinion by using an inch pound torque wrench. 30, Camber Cam Nut Pulley should not wobble with engine running. 13: With the jack securely in place under the lower control arm, slowly lower the lower control arm. The correct measurement is 26-3/8 inches. Manifold It is fine. in/lbs, Rear Spring to Carrier 50 Start engine and run only for about two seconds. 02: Jack the front of the Corvette up and let the front suspension hang. The most important change occurred in 1981 when the factory installed a composite rear leaf spring. The ram (shown) is attached to the relay rod. As a general rule, shock absorbers do not have a long life. Do this to both assemblies. If the hydraulic lines are not properly seated and tightened in the control valve and ram, they can leak. The differentials are basically all the same inside, but you find some minor changes during an overhaul. Use a 5/8-inch wrench to snug these bolts. If restoration is your goal, your choice is limited to locating the correct casting for your original engine. If your original differential is not making noise and does not show any evidence of abnormal wear, reinstall the old shims. Do not torque the end cap bolts on the shafts yet. Because the system is external, everything is easy to access. Apply silicone lubricant before installing the seal gear into the housing. Two 9/16-inch nuts secure the links. Cam Bolt These parts reduce the unsprung weight of your front suspension and are just as strong as the stamped-steel factory parts. We now have a rolling chassis ready . Tighten the nut when the rubber has been slightly compressed on the shock shaft. in/lbs, Lower 80 If you use the original ring-and-pinion gear that was removed the fit does not require much adjustment. 65, Spring Link Bolt to Torque Arm.- Torque to 25 lb. The transverse leaf spring bolts to the differential and is connected to the rear suspension trailing arms. Once the spring has been correctly installed, install the lower control arm bump stop. Service the pump with just enough fluid to submerge the pump inside the housing. Be careful to not over tighten them, as it damages the roller bearings. Required fields are marked *. (You can also use a large punch or another piece of solid metal.) Lift them and spread the shoes to mount them on the upper pivot bolt. Our inventory selection includes new pitman arms and slotted hex nuts, along with pitman . The 19681982 Corvette steering linkage was first used in the 1963 Stingray. The pitman arm bends away from the box as it goes down to the center link end. In the pitman arm thread several members talked about removing and rebuilding their steering gear. The spring should look like this when installed in its correct position. SAFETY NOTE: To minimize any danger, you may want to use a coil spring compressor tool available at any tool rental or auto parts store to help with the coil spring removal. Oil Bearing Cap This part takes a lot of stress and should be closely inspected to ensure that it is in excellent condition before installation. Also check the oil for any metal fragments, which tell you a gear tooth might be chipped or broken. They will be tightened and torqued when the completed car is sitting on its wheels and ready to drive around the block. Zip Corvette sales and customer service representatives are here to serve you during the following hours: Our showroom is open to the public Monday-Friday from 8:30am-5:30pm (EST). The measurement should be .006 to .008 inch. Use a locking adhesive on the threads and torque each one to 60 ft-lbs. Attach all of the power steering hoses. Read more about our performance and installation facility here. A torque converter system concept of driver, driven and belt member, the opposing halves or sides of each member being unequal in angle. Cars equipped with a big-block require a firmer spring as does the F-41 sports suspension option. Rocker Install the side pins with a spring cup and then install the upper spring. Remove the wood when this is complete. If you are not replacing the caliper, you can make a hook out of mechanical wire (or a coat hanger) and let the caliper and hose hang from the frame. A belt drives the power steering pump. This marks the gears with the dye and shows your gear pattern. This saves a lot of time during the reassembly process when trying to locate the next part to install onto the frame. Front Mounting Bolt 65, Ball Joint Attachment Nut The bump stop protects a severe bump or hole in the road. 35 Hand tighten until the bushings are slightly compressed. They spin it fifty times to the left and 50 times to the right. in/lbs, Front: Attach the frame crosspiece to the differential with two 7/16-18 x 118-inch bolts and 7/16-inch lock washers. You will notice that there are both right and left hand threads on the tie rods.
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