A DIY Guide in Replacing a Bent Pushrod
If you tend to drive fast or accelerate like a race car and then the speed of the depression on the pushrod is excessive, you'll most likely find yourself with a bent pushrod. If your car has a bent pushrod, you'll probably hear a ticking noise from your engine, fall flat at high revolutions per minute, and miss gears. A bent pushrod is usually caused by valve to piston contact. If not fixed straightaway, it can affect your engine's performance and cause serious damage to other automotive components. You can replace a bent pushrod yourself by following these simple steps:
Difficulty level: Moderate
Things you'll need:
- Ratchet wrench
- Socket set
- Replacement pushrod
- New valve cover gasket
- Yellow wax marker
Step 1: Take off the valve cover on the affected bank of your car's engine.
Step 2: To identify which pushrod or pushrods are bent, wiggle all the pushrods. Mark the bent pushrod or pushrods with a yellow wax marker.
Step 3: If your car has individual rocker arms, remove the rocker arm by taking out the rocker arm nut over the bent pushrod. Conversely, if your engine has a rocker shaft, loosen the bolts that are attaching the rocker shaft assembly to the head. Use a ratchet wrench and the proper size socket in removing nuts or bolts.
Step 4: To remove the bent pushrod, pull it up manually through the cylinder head and put it in a secure place. Inspect if all the other pushrods have deteriorated or cracked—do this if your engine is equipped with a rocker shaft assembly. If you see serious damage on one cylinder bank, inspect if the other bank has damage too.
Step 5: Examine if the rocker shaft, all the rocker arms, and springs on the shaft are damaged. If you see any damage on these parts, replace the worn or broken parts.
Step 6: Check the valve springs and see if there is breakage or damage. See if the visible part of the valve shaft is straight and not overly worn out.
Step 7: Install a new pushrod as replacement to the bent one. Reinstall the other pushrods by placing them manually through the cylinder head. Make sure that all these pushrods seat in valve lifter. Reinstall either the rocker arm or the rocker shaft assembly. Make sure that all the pushrods remain stationed in both the rocker arms or shaft and the valve lifters.
Step 8: Start your engine and adjust the valves if your car does not have a rocker shaft. To ensure that the rocker arms and pushrods are working properly, observe how they operate.
Step 9: Install a new valve cover and valve cover gasket. Then, clean up all oil in your engine compartment.
Step 10: Take your car for a test drive to guarantee that there are no more problems. Check if the valve covers has leaks.
While replacing the bent pushrod is important, it is not advisable for you to stop there. Bring your car to a technician to find out the cause of the bent pushrod.