LS - 1st and 2nd Gen (1990-2000) Discussion topics related to the 1990 - 2000 Lexus LS400

ticking sound bent or stuck valve?

Old 11-17-16, 07:41 AM
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Question ticking sound bent or stuck valve?

I have P0308 code.
I have changed spark plug,plug wires,both coil pack, both coil pack connectors,fuel injector is perfect.
My problem is constant tapping noise from exhaust on the passenger side.
Checked with scope no tapping noise from bottom or valve cover.
Engine will misfire only on cylinder #8. The noise i here almost sounds like its under the car on passenger side. No i have not done a compression test yet. Dont yell at me LOL! I am thinking this might be a bent valve or maybe a stuck valve. I did read some post i should try and clean it with carb cleaner. Any help i am lost and i just had timing belt water pump serviced 7 months ago. Car was running flawlessly.
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Old 11-22-16, 06:22 AM
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Last edited by plexus914; 11-23-16 at 12:38 PM.
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Old 11-23-16, 12:18 AM
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Sounds like valve lash to me.
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