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Another blow for Toyota/Lexus ?

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Old Feb 8, 2007 | 09:27 PM
  #41 (permalink)  
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Originally Posted by Usuck!
^+1, take the motor out of the tacoma and put it in a car! makea real fucking sports car again!
it's in the avalon,IS,GS,ES,RX,camry,and rav-4.....about the whole sludge issue...it's not just the 2MZ-FE that toyota has problems with sludge....but my theory is there operating temerature of there motors...aluminium expands more then steel soo...the aluminium block expands larger than the bore was origanally designed for and thats where you get the sludge and oil consumption...just what i think though....
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Old Feb 8, 2007 | 09:28 PM
  #42 (permalink)  
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Originally Posted by gtmike
it's in the avalon,IS,GS,ES,RX,camry,and rav-4.....about the whole sludge issue...it's not just the 2MZ-FE that toyota has problems with sludge....but my theory is there operating temerature of there motors...aluminium expands more then steel soo...the aluminium block expands larger than the bore was origanally designed for and thats where you get the sludge and oil consumption...just what i think though....
I dunno, a lot of manufacturers use aluminum blocks/heads/etc and don't have that problem.
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Old Feb 8, 2007 | 09:30 PM
  #43 (permalink)  
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Originally Posted by gtmike
it's in the avalon,IS,GS,ES,RX,camry,and rav-4.....about the whole sludge issue...it's not just the 2MZ-FE that toyota has problems with sludge....but my theory is there operating temerature of there motors...aluminium expands more then steel soo...the aluminium block expands larger than the bore was origanally designed for and thats where you get the sludge and oil consumption...just what i think though....
the cylinder liners are still (at least) steel, often times with composites added to tighten ring seal even further. This is the case with many modern alum engines.

I'm not really sure what causes sludge to form, other than not changing your oil often enough.
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Old Feb 8, 2007 | 09:37 PM
  #44 (permalink)  
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toyota uses a really high normal operating temp though...the cylinder expands faster than the piston....
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