Q: Push rod keeps bending.

asked by on

I am having problems with the push rods bending or breaking on one of my cylinders. I bought a new push rod and installed it. The new one bent almost immediately. I need some help figuring out what is causing this problem and how to fix it.

A: A common issue would be a sticking hydrauli...

A common issue would be a sticking hydraulic lifter which can end up with enough of a gap between the top of the lifter and the push rod that the push rod can get sideways and end up bent. Another issue could be a valve sticking closed either from sinking into the seat causing excessive stress on the pushrod or not enough valve stem to guide clearance cause by dirt/sludge in the guide or a bent valve stem causing the valve to bind up in the valve guide. Lifter preload needs to be checked and compared to manufacturer specifications. The lifters can be removed and checked for consistent compression and springback. The head may need to be removed and disassembled to inspect the valves, seats, and guides. You may need to enlist the help of a mechanic and/or machine shop to diagnose the issue.

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: My front brakes are sticking but i cant tell if it is the caliper or the master cylinder

Most of the time, this is caused by the caliper sticking, or the slide pins freezing up. There is a return valve in the master cylinder that could be plugged partially, but that is not common. Is is also...

Q: My ac is making noise and not blowing out air...how much to replace compressor and flush system?

In order to fully diagnose your ac system, both the high and low side pressures will need to be looked at. It sounds like you have a leak in the system. If you used refrigerant with leak detector, you can...

Q: 2005 Chrysler 300C changed battery and alternator. Car started, ran, and then battery light came on. Shut car off and wouldn't start.

Hi. There is a couple of things that could be wrong here. The battery or alternator that was just installed could be defective. Theses parts need to be tested for proper operation. There also could be a fuse, fusible link,...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...