New to me unknown maintenance history 120k The valvetrain is noisy especially cold. Is this just a noisy engine? Changed oil to PP 5w20 cause it was on hand noticed no difference spec is 5w30. Thoughts?
2011 Sentra 2.0 SL 120k noisy valvetrain ?
- Thread starter cknight49090
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Vehicle, engine, miles?
I believe the valves are adjustable but was waiting for someone to chime in?
I just did a quick search, but one source mentioned that the MR20DE engine has mechanical valve lash. I have no idea if lash adjustment is done by replacing cam lifter bucket(s) with the correct the OAL, like a Toyota 2AZ-FE, or if it uses shim under bucket adjustment. Either way involves pulling camshafts if a prior proper clearance check shows the need. There's always the chance it could also be a noisy VVT solenoid. At 120k, either item could be needed.
I added a little T6 5w40 and it didn't change much. I am just going to try something different next oil change.
This car model year should have a MR20DE. Simple inverted bucket DOHC, They are noisy cold.
Also has a likey a worn VVT actuator which can rattle.
I had a QR25 DE design before the 0w20 mods. Std DOHC direct acting with inverted buckets.
VERY noisy cold even when new.
Installing wrong oil grade doesn't help - but shouldn't kill it of the bearing aren't worn excessively.
These are filter sensitive also. I Had a few defective Genuine NISSAN parts filters that I had to pull off early.
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Does it quiet down when warm? Like described in this thread? Sounds like a sewing machine?
forums.nicoclub.com
Mine has been doing that since new. Hasn’t changed over 12 years and 100k miles.
Valve lifter noise - Nissan Forum | Nissan Forums
forums.nicoclub.com
Mine has been doing that since new. Hasn’t changed over 12 years and 100k miles.
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5w40 for vqs was a popular mod, cant hurt to try on your engine.
no brotella, pick up some proper euro oil
no brotella, pick up some proper euro oil
I have some 0w40 m1 probably try that.
Does Nissan still use those noisy fuel injectors? 
In FL and on that engine, try 10w-30 or even 10w-40 oil.
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