engine knock
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Joined: Sep 2006
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From: tx
engine knock
Need help with my rx 300 year 2000 120.000 miles i was told that one of my valve lifter is making that noise . The knock does not go away even after the engine warms up.i do cahnge my oil every 3000 miles im using penzoil platinum syn. Oil.so what do i do with the knocking noise?
Lexus Test Driver
Joined: Apr 2008
Posts: 1,058
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From: Illinois
No miracle oil will solve your knocking problem.
It could be a worn out lifter and hopefully it did not damaged the head.
You need to figure out which lifter it is. Maybe you get lucky and it's in Bank 2 ( radiator side)
If it's a broken valve spring. It's still doable w/out taking the head off.
Worse case scenario is a broken valve.
It could be a worn out lifter and hopefully it did not damaged the head.
You need to figure out which lifter it is. Maybe you get lucky and it's in Bank 2 ( radiator side)
If it's a broken valve spring. It's still doable w/out taking the head off.
Worse case scenario is a broken valve.
CL Community Team
Joined: Apr 2001
Posts: 16,559
Likes: 1,385
From: Austin, TX
Need help with my rx 300 year 2000 120.000 miles i was told that one of my valve lifter is making that noise . The knock does not go away even after the engine warms up.i do cahnge my oil every 3000 miles im using penzoil platinum syn. Oil.so what do i do with the knocking noise?
Salim
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CL Community Team
Joined: Apr 2001
Posts: 16,559
Likes: 1,385
From: Austin, TX
I was under the impression that they are hydraulic lifters which take some time to fill up and the chatter goes away. Now need to come up with another explanation for the cold morning chatter with wider wider range engine oil (W weight).
Salim
Salim
Lexus Test Driver
Joined: Apr 2008
Posts: 1,058
Likes: 126
From: Illinois
Artbuc , code58 and carguy are right.
These are solid lifters that are shimmable if the clearance is too big.
I think the "GR" motor in the 350 are hydraulic though.
The OP stated it was a "knock".
Which leads me to believe something is broken or severely worn.
Hopefully it's a "tick" or a "tapping" noise instead.
These are solid lifters that are shimmable if the clearance is too big.
I think the "GR" motor in the 350 are hydraulic though.
The OP stated it was a "knock".
Which leads me to believe something is broken or severely worn.
Hopefully it's a "tick" or a "tapping" noise instead.
CL Community Team
Joined: Apr 2001
Posts: 16,559
Likes: 1,385
From: Austin, TX
I have had chatter in the winter months. I have recently replaced the knock sensors and the weather has warmed up. [My cel kept coming back during Dec and Jan]. I will monitor and report back.
Salim
Salim
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