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Toyota Avalon Engine Questions

353 messages,  Last post on Nov 16, 2009 at 7:10 AM

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#2 of 353 Pipe melting onto the manifold by mazdamom1 Jun 10, 2002 (11:37 am)
My mom took her 2000 Avalon in for 40,000 mile checkup and was told a pipe had melted onto the manifold and could not be removed. The entire manifold had to be replaced in order to pass GA emission testing. Two different kinds of metal were used in the original construction of the car and when the car was heated, the melting occurred. My parents are expected to replace at their own cost. Any other reports of similar instances and if so, how was it handled? Seems like Toyota should be responsible, doesn't it?
#3 of 353 98 Avalon check engin light and intermittant quiting fan and temparature by muru1 Jul 09, 2002 (8:21 am)
I bought a 98 Avalon Resently and its engine light comes on, when I shut off the car for few minutes then I start every thing work ok and no engine light on.Also some times it quit the fan and outside temparature.I shut down then start every thing ok.I went to dealer for the engine light problem and they change the speed sensor but I these problems intermittant.Please help me in this matter. THANK YOU
#4 of 353 Engine Oil Test by jc217 Jul 22, 2002 (4:47 pm)
I have a 2002 Avalon with 22K miles. I have been running oil samples on this vehicle since the second oil change. Test results show 5 to 9 % fuel dilution in the motor oil as well as some dirt contamination. I have talked to my Toyota service manager. He has no clue as to why all the contamination. I asked about fuel mixture being too rich. He said it can't be changed since everything is electronic. I asked about some type of injection leak. He said it's not possible. I generally run vehicles to 150 - 200K, but am worried about the engine. Should I be worried?   Any suggestions or ideas?
#5 of 353 Questions on Engine Oil Test by highlander7 Jul 23, 2002 (11:48 am)
jc217 I have no idea of why the fuel dilution. Do you know what percent is an acceptical level?   Questions:   How often do you change the oil and filter?   Who changes your oil and filter, Dealer, Local Garage, Self...?   What type driving do you do? Short Runs, Highway, City, How Severe?   What viscosity and manufacturer of oil? 5/30? _________   Do you use a Toyota oil filter?   Where do you have your oil analyzed for contaminets? How large of a sample do you retain for analysis?   How does the data you have on this engine compare with other vehicles you have driven?   I understand that many short runs, mile or two, then the vehicle sits for hours before other short runs will cause condensation and other contamination in the oil.   The fuel percentage may be troublesome. If this is an easy item to check, I would like to do this on occasion. Thank you for your information, hope you get a good answer.
#6 of 353 Engine Oil Test by jc217 Jul 23, 2002 (7:08 pm)
Highlander   I change the oil and filter every 3 - 4,000 miles. All changes have been made at the local Toyota dealer. I assume Toyota filters. They do use Mobil 5w30 oil. Driving habits are primarily highway/rural road driving, minimum of 15 miles with about 75 to 100 miles per day. Less than 10 miles of city driving about three times per week.   I use the Oil Analysis Labs out of Spokane WA. www.oillab.com They provide a 1-2 oz. sample bottle. They provide test results on 27 factors such as the physical data of the oil, metal concentrations, additive and contaminant products. They can diagnose the fuel dilution to 0.5% I have no idea what the Toyota specs are. Apparently, my shop manager has no idea either. He photocopied my report to discuss with technician but I never heard back from them.   I also have a 95 Geo Prizm which has the 4 cyl Toyota engine in it. It has 141K miles and its sample tested at 0% fuel dilution. In fact, it tested cleaner than the 2002 Avalon in most of the categories.
#7 of 353 jc217 - Engine Oil Tests by highlander7 Jul 26, 2002 (2:44 pm)
Will Oil Analysis Labs comment on this level of fuel dilution?   Until you get an answer, I will begin changing the oil on my wifes 03 Avalon every 2000 miles and submit samples for analysis. Before your posting, I was considering changing oil and filter every 2K miles, now with your dilution data I will do so. She only drives 6-8K a year so this will be easy to do. I always change oil at the first 1000 miles, then every 3000 after that. 2000 miles may be excessive but I want the car to last!! Also, I will begin submitting my 4Runner oil for same analysis so I will have a comparison   If you left the oil in until 7500 miles, wonder if the fuel percentage would be greater? And what damage might this do?   Does anyone out there have an answer for jc217 posting #17?
#8 of 353 Mazdamom1 Pipe Melting? by footie Jul 28, 2002 (4:01 am)
Hi,   Did you ever get an answer to your question about the pipe melting on the manifold?   Did the 'check engine light' come on?   What 'pipe' actually melted? Can you see it melted? I may be presumtuous here, but it sounds a lot like a dealer trying to find a way to do big $$ work.   Did your Mom actually have any performance problems with her Avalon? If it was running ok, getting normal gas mileage...there's probably nothing under the hood that could melt that would impact emissions in GA or any other state.   I hope she shopped around for a 2nd opinion.   Regards
#9 of 353 Fuel Dilution of Oil by armtdm Aug 04, 2002 (7:22 am)
Was it .5% or was it 5%.. Anything under 5(five) percent for me is okay due to more short trips. However, I change the oil every 7500 with synthetic. The ppm of the dirt was not provided. If there is minimal wear metals then the silicon (dirt so to speak) is coming from seals and gaskets, not dirt. The fuel, usually too short trips or excessive idling but if not the case for you it is interesting. However, if under 5% don't worry about it, especially if wear metals are looking good.

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