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lexpert, Lexus Master tech
Category: Lexus
Satisfied Customers: 9974
Experience:  Master Certified with lexus, 8 years experience with Lexus
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Lexus gs300 oil leak problem

Customer Question

oil leak problem. have isolated source of leak. coming from larger of two plugs on oil filter bracket. is it ok to remove plug and what size hex tool do i need to remove plug?
Submitted: 4 years ago.
Category: Lexus
Expert:  lexpert replied 4 years ago.
Hello and thank you for using just answer!
Do you know the repair history on the car????? Was anything done to the car before this issue and are you sure that this is the actual source of the leak and that this is not dripping down from the valve cover gaskets??? Because if the source is coming from the oil filter bracket on the block then you probably have an issue with a split block or a bolt that was installed that was too long and a block split.
Customer: replied 4 years ago.
i am the 2nd owner. know the original owner personally and all work was performed at lexus dealer. other than a new ECM in 2000 only scheduled PM work done. I replaced the timing belt about 15 mo. ago. leak started small about 2 years ago (noticed when removng filter at oil change) but is getting worse. have cleaned engine and oil origin seems to be from threads of larger of the 2 plugs near the oil filter mounting surface. have washed area again and will take a better look at this. what is this plug and can i remove and put some thread tape on it? do not think it is a drip but will test this theory also.
Customer: replied 4 years ago.
OK, i covered the bracket and plug (larger of two hex head plugs) on side of filter bracket. The oil is definttely coming from around the threads of larger plug. It seems as there is some type of factory installed thread sealer. What is this plug for? Can i try tightening or remove and try thread dope? For what they are worth, i do have the factory shop manuals. Thanks
Customer: replied 4 years ago.
Relist: Other.
need help, have isolated oil leak to a plug on oil filter assy. is there a simple fix? can i remove the plug and reseal the threads?
Customer: replied 4 years ago.
Relist: Other.
relist because i have not heard from anyone for almost 24 hours. oil leak, source is large plug in oil filter housing bracket. hoe do i fix>

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