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Avalon oil leak
I did a search on the 05-09 Avalon oil leaks and found many many posts about the VVT (variable valve timing) oil line hose rupture. It is not the drip problem which a TSB was issued about in 05. This involves the rubber portion of the line rupturing between the two steel oil lines and if it goes you get no alarms or anything to alert you other than oil smell or air conditioning belt slipping. Good chance of damaging engine from lack of oil and some have had to replace engines.
I have read that the 09 Avalon's now have a solid steel line which eliminates the rubber hose stuck between two steel lines. One posting said Toyota posted a Tech Tip 2310 Sept 08. Another listed a Toyota part #15772-31030 as an all steel line that is now used on the RAV 4 also. Another post said he had his 3 piece line replaced with the one piece line for $39.22 for parts and $126 for labor which seems cheap but it's much cheaper than a engine.
Toyota knows about the problem but has not issued a TSB.  Some posts say that it is covered under the 5yr/60K power train warranty if the hose fails. If the hose has not yet failed, most owners are paying to remove the hose and go with a solid line. I guess it's up to each dealer and how nice you can be with him to work with you on cost.
I have not verified any part numbers listed above for accuracy but will be headed to my dealer to talk it over on the options and cost. Stay tuned for further updates. My 05 is till within the 5/60 warranty for what it's worth.
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2008 Toyota Highlander Basic. 2WD, Salsa Red, Gray Pin Stripe, Scangage II, Gentech Mirror, Fog Lites, Vent Visors, XM Roady
2005 Toyota Avalon Limited, No Nav, XM Roady
1974 Chevy Corvette Sting Ray, 350 High Performance
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