Car Problem Reports

Honda Odyssey Porous Engine Block Casting May Cause Engine Oil Leaks

Honda Odyssey Problem
16 Reports
Me Too

Model Years Affected: 1999, 2000, 2001, 2002, 2003

Engine Affected: 3.5L V6

Average Mileage: 160,625 mi (103,000 mi - 223,000 mi)


The engine may develop and oil leak due to a porous engine block casting. The repair procedure is dependent on where the leak is located. Honda has released a service bulletin covering model years 1999-2003. Honda may offer assistance with repairs, determined on a case by case basis.


  • Visitor, , 3.5L V6, 175,000 mi

    I have a oddsy honda2003 van and i see a leak near the main seal what can i do

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  • Visitor, , 3.5L V6, 223,000 mi

    Not fixed yet... Had routine maintenance (timing belt etc...)... Prior to maintenance, only a slight occassional drip from oil pan seal... After maintenance, now leaking 2-3 or more drops per day... Dealer said engine block was porus near Idler Pulley. Dealer wanted to charge another $700 to tear down and patch with no guarantee. Dealer's Service Mgr was also rude and not dedicated to any customer service. Additionally, called Honda America - they wouldn't give me the time of day due to age and mileage. Van in great shape until they "Fixed" it... In my opinion a dealer should've known about this problem and suspected/checked for it before doing a bunch of expensive repairs on an old van. I hold the Dealer and Honda responsible for this issue... Anyone with suggestions...

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  •  Rookie

    I noticed oil on the drive way, I checked the oil filter, no leak. I took i took the car in to get checked out andthey said their was oil comeing from the engine block and running out the bottom of the engin. what can be done tro fix this problem

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  • Visitor, , 3.5L V6, 149,000 mi

    Oil on garage floor. after looking at engine removed rear main seal cover and found oil leaking

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  • Visitor, , 3.5L V6, 190,000 mi

    Rear engine main seal leak

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  • Visitor, , 3.5L V6, 163,000 mi

    spent couple thousand of dollars try to fix this leak, returns after a few days from shop. Incompetent Honda dealer. I gave up and just put something under the car as to not soil the driveway. Car still runs good and check oil frequently. Oil has never been low.

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  • Felixfam, , 3.5L V6, 103,000 mi

    Oil leaking from engine block. The oil gets on manifold and car smokes. We are having a local garage pull the engine to epoxy the block. Hoping the problem is found in a good spot. Does Honda cover this concern?

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