Helpful tips

What would cause a bent pushrod?

What would cause a bent pushrod?

Several factors can attribute to a bent pushrod. Sticking hydraulic lifters with a distinct gap in-between the rod and lifter can cause a bent pushrod. Other causes include loosening valve guide thimbles (in small engines), stud or rocker ball wear.

Can a bent pushrod be fixed?

Yes, you repair them by going to your favorite auto parts store and ordering a new set. You also need to figure out why they are bent. Way back when, I asked my high school autoshop teacher about the “slightly” bent pushrods in the engine I was rebuilding.

How much does it cost to fix a bent pushrod?

It might take 7 hours (very rough) to replace the one head that has the broken valve, so 7 hours of labor is roughly $630. So, adding in a little for the incidentals, at minimum, it’d cost at least $1,000 if you just replaced the head to solve the problem but that assumes that no other damage is found.

How do you straighten a pushrod?


  1. Take one of the plugs out.
  2. Stick end of pushrod in hole.
  3. Pull up on pushrod till straight.
  4. Repeat till all pushrods are straight.
  5. Replace sparkplug, finger tight.

How do you replace a bent pushrod?

Remove the valve cover on the affected bank of the engine. Wiggle all of the pushrods to determine which rod or rods are bent and mark the rod with a yellow wax marker. Remove the rocker arm by removing the rocker arm nut over the bent pushrod — if the vehicle is equipped with individual rocker arms.

What would cause a bent valve?

Bent valves occur when there is a serious problem with the timing of the engine. This is most commonly caused by a broken timing chain or timing belt. It can also occur if the timing belt slips and causes a misalignment of the camshafts and the valves.

Can you replace just 1 push rod?

Yes, you can replace a single pushrod.

How long can you drive with bad lifters?

How long can you drive with bad lifters? If your lifters are bad or collapsed, you shouldn’t drive more than 100 miles and you should use those miles to drive your vehicle to the repair shop.

Can a bent valve cause misfire?

Bent or burnt valves can also cause your engine to misfire. This means the engine may jerk, stall, or hesitate when your car is in motion. Your vehicle’s fuel consumption could also increase if it is misfiring due to a bad valve. These are some of the many symptoms of a bad exhaust valve or intake valve.

What are signs of a bent valve?

The symptoms of bent valves include an engine that won’t start, an erratic engine when idling, lack of engine power, a knocking noise from the engine and excessive exhaust fumes. Engine valves are responsible for controlling the fuel delivery and gas removal in your engine.

Can I drive with bent valves?

A bent valve could start a fatigue crack in the stem and if it breaks you drop the valve in the cylinder. if the valves are not bent that much, then it can still run with most likely not much problems. …

Is there a problem with pushrods on a Harley Davidson?

You have a common problem with adjustables, a lot of engines I’ve worked on do have a small amount of run out with there pushrods, don’t forget you have a high performance engine with some pretty heavey valve springs them rods are pushing.

How can I tell if my push rod is bent?

When I allow the push-rod’s chrome cover to lay against the push-rod. Actually using a finger to keep it against the rod and as I turn or spin the push-rod. The chrome piece would move back and forth. Maybe 3/32nds. Besides holding the chrome piece against the push-rod and just turning it. I can see that the rod is actually bent.

When did the Harley Davidson Evolution engine come out?

And in 1984, they did just that with the release of the Harley Evolution engine. The Evolution, also known as the Evo or Blockhead engine, was a complete revamp of the Big Twin.

When did the Harley Davidson shovelhead engine come out?

The Shovelhead was a decent engine for the time, but the quality was not always there and at the end of its life, it was struggling to compete with the foreign imports. To save the company once again, Harley-Davidson needed to evolve. And in 1984, they did just that with the release of the Harley Evolution engine.