Skip the auto shop - Our mechanics make house calls

Q: My engine has a ticking knocking type of sound. It runs fine not buring oil or losing coolent. Sounds like the valves taping

asked by on

My engine has a ticking knocking type of sound. It runs fine not buring oil or losing coolent. Sounds like the valves taping or rod bearings I can't tell where it's coming from. The sound goes and comes

its a 98 ranger with a 2.5l has 147000 miles.
My car has an automatic transmission.

A: On a 1998 engine with 147,000 miles, the no...

On a 1998 engine with 147,000 miles, the noise could come from anywhere. I typically check the engine oil level when cool to verify it is correct. Then, I run the engine for 5 minutes, shut it off, and check the engine oil level again.

If after running it for a short time and the engine oil level is lower, then it is likely you have a sludge build-up in your oil return passages preventing oil from draining back to the oil pan. If so, maybe an engine oil flush is in order. At the mileage, sometimes an oil flush may do harm to your piston rings or may help. You never really know.

If the oil level is correct after running the engine, you should have an oil pressure gauge connected to the engine to verify that it is within specifications to factory numbers to verify the oil pump is working properly.

An engine tapping noise could be anything from connecting rods on the crankshaft to an engine valve lifter. If the noise is a knock-knock in a repetitive motion at a slow speed, I would suspect lower engine problem, like a connecting rod (which requires a complete engine rebuild). If the noise is at a higher frequency, then I would think you have a valve issue which could be repaired at a much lower cost.

Based upon mileage, the feeling of how the engine runs, engine codes (if any), and an unknown level of maintenance, it is difficult to determine the exact issue. You may need an engine repair, a new engine, more oil, an oil pump, or just live with it. I’d have a certified mechanic take a look at it to diagnose and fix the sound that’s coming from your engine.

Was this answer helpful?

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・Fair and transparent pricing

Get a quote

What others are asking

Q: Its backfiring mostly while driving, loss of power, fuel consumption, motor doesnt idle smooth, P0300 code, no timing codes

Hi. Before I condemning the timing chain and or the fuel injectors let's look at some simpler parts that seem not to have been changed yet. The distributor cap and rotor botton if worn or broken can cause the truck...

Q: How do you use the Category menu on the SIRIUS Radio?

While you can manually cycle through all the different channels available from SIRIUS Radio, that can be time consuming. Use the Category menu to find the type of entertainment you want. Here’s how to get to the menu and use...

Q: Replace Canister Purge Valve.

Billing question was sent to CS for the cost of labor to install a canister purge valve in the fuel system on a 2010 Ford Fusion with a 4L-2.5L engine.

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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.