Running Ox Posted April 7, 2009 Share Posted April 7, 2009 Who did that before, Is that a routine work? I feel my 2004 RX330 a little bit powerless, so want to adjust the valve clearance. But I heard the modern car doesn't need to do that. Any other opinions? Quote Link to comment Share on other sites More sharing options...
1990LS400 Posted April 7, 2009 Share Posted April 7, 2009 Yes, it is true. Toyota and Lexus engines almost never need a valve adjustment. You just gotta love modern technology. Quote Link to comment Share on other sites More sharing options...
pauljcl Posted April 7, 2009 Share Posted April 7, 2009 Yes, it is true. Toyota and Lexus engines almost never need a valve adjustment. You just gotta love modern technology. I didn't know they EVER needed adjustment, except if broken. I assumed that they were hydraulically adjusted (vs. (e.g.) shims) automatically, like most if not all modern engines for the public? Quote Link to comment Share on other sites More sharing options...
artbuc Posted April 7, 2009 Share Posted April 7, 2009 Yes, it is true. Toyota and Lexus engines almost never need a valve adjustment. You just gotta love modern technology. I didn't know they EVER needed adjustment, except if broken. I assumed that they were hydraulically adjusted (vs. (e.g.) shims) automatically, like most if not all modern engines for the public? No, they have shims. Quote Link to comment Share on other sites More sharing options...
pauljcl Posted April 7, 2009 Share Posted April 7, 2009 Yes, it is true. Toyota and Lexus engines almost never need a valve adjustment. You just gotta love modern technology. I didn't know they EVER needed adjustment, except if broken. I assumed that they were hydraulically adjusted (vs. (e.g.) shims) automatically, like most if not all modern engines for the public? No, they have shims. OK - Thanks! Quote Link to comment Share on other sites More sharing options...
lenore Posted April 7, 2009 Share Posted April 7, 2009 by the way I have 162k miles, never adjusted the valves and the engine is just fine. my next door neighbor with the sludged engine which we rebuilt did adjust 2 valves with the shims....They were loose, I told him loose is OK, tight is when there is a problem, but bless him he did it right. Here is a picture of shim on the 1mze engine.... Quote Link to comment Share on other sites More sharing options...
code58 Posted April 8, 2009 Share Posted April 8, 2009 by the way I have 162k miles, never adjusted the valves and the engine is just fine. my next door neighbor with the sludged engine which we rebuilt did adjust 2 valves with the shims....They were loose, I told him loose is OK, tight is when there is a problem, but bless him he did it right. Here is a picture of shim on the 1mze engine.... Lenore, For the life of me, I may be as blind as a bat but I have looked and looked and can't see where the shim is in that picture. Clue me in. Thanks! Quote Link to comment Share on other sites More sharing options...
lenore Posted April 8, 2009 Share Posted April 8, 2009 by the way I have 162k miles, never adjusted the valves and the engine is just fine. my next door neighbor with the sludged engine which we rebuilt did adjust 2 valves with the shims....They were loose, I told him loose is OK, tight is when there is a problem, but bless him he did it right. Here is a picture of shim on the 1mze engine.... Lenore, For the life of me, I may be as blind as a bat but I have looked and looked and can't see where the shim is in that picture. Clue me in. Thanks! the is a cup on top of the valve lifter that accepts the disk. There is a special tool that pushes that valve lifter down so that different size shims can be inserted. what you are seeing is the cam lobe with the lifter below it which retains the shims with a very small lip on top. Quote Link to comment Share on other sites More sharing options...
code58 Posted April 8, 2009 Share Posted April 8, 2009 by the way I have 162k miles, never adjusted the valves and the engine is just fine. my next door neighbor with the sludged engine which we rebuilt did adjust 2 valves with the shims....They were loose, I told him loose is OK, tight is when there is a problem, but bless him he did it right. Here is a picture of shim on the 1mze engine.... Lenore, For the life of me, I may be as blind as a bat but I have looked and looked and can't see where the shim is in that picture. Clue me in. Thanks! the is a cup on top of the valve lifter that accepts the disk. There is a special tool that pushes that valve lifter down so that different size shims can be inserted. what you are seeing is the cam lobe with the lifter below it which retains the shims with a very small lip on top. Now I understand Lenore. I understand why I couldn't see it. Quote Link to comment Share on other sites More sharing options...
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