Skip the auto shop - Our mechanics make house calls

Q: The engine ticking on a '95 Lexus LS 400

asked by on

I've got a '95 Lexus LS 400, with 390,000 miles and recently I've started hearing a ticking sound from the engine and the ticking is faster if I put my foot on the gas. Any thoughts about what it could be?

The first thing you’d want to do is get someone to check the valve lash--it may need the valves adjusted. Those things have pretty bullet-proof engines but they do have the valve adjustments on them that are little, stainless steel shims.

The little stainless steel shims, when they wear out and it starts clicking, are a really tough job, because not only do you have to take a lot of the engine apart to get the shims out, but then you have to measure in first to see how much off they are and then take the shims out, measure them and buy shims that are so much bigger or larger so that it works.

That’s something you really should pay a professional mechanic to do. You can have a technician from YourMechanic adjust your valve so that you don’t have to do it for yourself. Let’s say that the valves were all adjusted correctly and it wasn’t that, they’ll check the things like the fuel injectors. Sometimes they wear and they click. They will have a little stethoscope to listen the fuel injectors and diagnose exactly what is causing the ticking noise.

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: Clicking noise after car has been started while idling

Hello, thank you for writing in. The ticking noise may be coming from the alternator itself, or from the drive belt that powers it. When the vehicle is cold it can be loud and need a moment to warm up....

Q: Trouble starting car after sitting for 2 hours

You may be having a problem with one of the battery cables or connections. A mechanic can do what is called is a voltage drop test on the starter and all the cables to see if one or more cables...

Q: Car stalls and P0401 insufficient egr flow

The P0401 code is for low EGR flow, but would not be the cause of the stalling if the flow was too low. You also state the problem is when the engine is cold and goes away after it is...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...