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

What could be causing such sludge?

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Old 07-28-18, 12:33 PM
  #16  
dicer
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Originally Posted by sayow
I would add the the 1UZ-FE engine while legendary for its reliability IS an interference engine, meaning that if your timing belt snaps you will likely bend valves or worse depending upon RPMs at the time the belt breaks (idling in driveway vs 85mph down the highway). If you have no idea when the timing belt was changed I would be a bit worried at that mileage.
So how do you know this to be true??? Sorry but your wrong. And you are also correct. The Gen 1's 1990 to 1994 are NOT INTERFERENCE. Anything after that IS INTERFERENCE. My brother inlaw and wife were on a long trip and had the timing belt snap on their 1990 years ago, belt was fixed and they were on their way.
Old 07-28-18, 12:38 PM
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http://www.proctorcars.com/engine-sl...res-explained/
Again sludge in terms of cars is this. Yeah I know the proper definition may work just fine but is misleading. And is the only reason I clicked on the post in the first place.
If the title would have been "Leaky oily dirty residue on the outside of the engine" I likely would not even be here.
Old 07-28-18, 01:41 PM
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Originally Posted by dicer
That is part of learning, using the proper nomenclature. If nomenclature is tossed out the door, imagine the discussions of the future. Its so funny in the computer world of programming and coding the syntax has to be perfect, if not the compiler will reject and complain. Yet in the car forum world nomenclature is thrown in the trash can.
The one I love the best is BRAKES. How many times is it written as Breaks ? The meaning of those 2 words are worlds apart. Just go to google and type in
DEFINE BRAKES etc etc. Since these forums are for learning lets help the learning process, even if it hurts some feelings sometimes.
Since we are in the learning mode, your and you're are two different words.
Old 07-28-18, 05:13 PM
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sayow
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Originally Posted by dicer
So how do you know this to be true??? Sorry but your wrong. And you are also correct. The Gen 1's 1990 to 1994 are NOT INTERFERENCE. Anything after that IS INTERFERENCE. My brother inlaw and wife were on a long trip and had the timing belt snap on their 1990 years ago, belt was fixed and they were on their way.
Well he said his was a 99 so... while technically you are correct and i could have been clearer, my response was directed at the OP who was asking about a high mileaged 99.
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Old 07-29-18, 01:36 PM
  #20  
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My engine looked just like that when I did my TB. It's more than likely your valve cover gaskets but could be your camshaft seals (Pray it's not those). I would Get lots of cans of brake cleaner for a back up or just get a big bottle of simple green and take it to a self serve car wash and power wash it like someone suggested already.
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