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Toyota Avalon Engine Questions

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

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What is this discussion about? Toyota Avalon, Engine, Sedan

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#288 of 353 Re: Cam Timing 97 Avalon [ttyler2000] by ttyler2000 Sep 26, 2008 (6:34 pm)
Replying to: ttyler2000 (Sep 26, 2008 3:36 am) Terry I told you I would post back as soon as I got the car together and running. Since you already know the issue with the manuals vs. the actual job, here is what I did on my 02 Camry V6. I set both sets of cam gears to match up to the 1 dot marks which made my timing gears all line up with the corresponding marks, put it all together and fired it up. It was right. I see yours is a 97 and mine is an 02 so in that 5 year span I am betting there is more that just 2 vehicles out there with the same issue. Hope this post helps others. The way I see it is bring the engine to TDC, use a compression gauge on the #1 cylinder to insure you are on the compression stroke. Intall your camshafts by matching up either the set of marks as long as they are the same ie; either 1 to 1 or 2 to 2 tighthen your caps and forget it at that point. When you are ready to install your timing gears if the cams are not in the correct position to install they gears with there coresponding marks then rotate it 180 degress so the marks are right on both heads then install your belt period. In the future I will always look at the gears before I pull the cams just to be sure. But I can honestly say the book is not right in this particular case.
#289 of 353 Avalon Engine Squeaks Loudly at Start-Up by dcbishop Feb 08, 2009 (8:33 am)
I have a 2000 Avalon XLS, 6 cyl. Just recently it started squeaking very loudly after starting up, The squeaking gets louder and louder until for about 25-30 seconds, after which the rpms or the general stability of the engine makes the squeaking go away. The squeaking usually happened while in reverse and does not go away until I push the rpms above 2k consistently.   What can I do to fix this. I leave the house at 5:45am and my wife can hear the squeaking very prominently in our bedroom. I can only imagine what my next door neighbors are thinking... Replies to this message: mashoud (Feb 08, 2009 4:55 pm)
#290 of 353 Re: Avalon Engine Squeaks Loudly at Start-Up [dcbishop] by mashoud Feb 08, 2009 (4:55 pm)
Replying to: dcbishop (Feb 08, 2009 8:33 am) By the feel of it, it sounds like the fan belt is either loose or worn out and is slipping.   Also possible that the bearings on the alternator are shot.   Check both of these items.   Just one little trick...before starting the car, drop a few drops of plain dishwashing detergent on the belt and the drive pulley and see if it makes a difference. If it does, your fan belt is worn out and pretty shiney looking on the sides. Just my penny's worth. Good luck!!
#291 of 353 Avalon Oil Leak-VVT Oil Line Issue-TSB by luckykrc Feb 28, 2009 (7:01 pm)
I have a 2006 Avalon Touring Sedan with 27k miles. Last weekend, the red oil light came on. I opened the hood, and oil had sprayed all around the engine compartment. Most of the remaining oil drained while I was waiting for a tow truck. The Toyota dealer indicated that this was a recurring problem with the VVT (variable valve timing) line, and they already had 3 other Avalons in the service department with the same problem--and repair parts were backordered. Through an internet search, I discovered that a Technical Service Bulletin has been published on this for the 05 and 06 Avalons. Fortunately I am covered by warranty and a service loaner is being provided. Has anyone else on this forum experienced this problem? Replies to this message: aveprobs (May 14, 2009 9:02 pm)
#292 of 353 2000 Avalon check engine light by selffixer Apr 20, 2009 (7:51 am)
I had the check engine light come on recently, and thanks to this and other forums was able to diagonse and fix the problem.  I wanted to share it with others in the event you have the same problem.   Problem:  check engine and VSC warning lights came on right after I had the car alignment checked and tires balanced at about 88,000 miles.   I had the check enginer code read by Pep Boys (for free) and it was code P0171, "system too lean bank 1".  That was the only code.  I had read on a forum that the code means the Mass Air Flow sensor (mounted just after the air cleaner) needed cleaning.  I disconnected the electrical connector cable for the sensor, removed the sensor, and sprayed CRC QD electronic parts cleaner (Pep Boys, $5.99) onto the little wires inside the Mass Air Flow sensor without touching the sensor (the sensor wires are very small and sensitive and should not be touched).  I then let the sensor dry (about 10 minutes) and reinstalled the MAF sensor and reconnected it.  I also removed the 15 amp EFI fuse in the fuse box (under the hood, next to the air cleaner) to reset the check engine light.  After a week and several driving trips the check engine light remains off and the car runs as good as new.    I had read on other forums that the reason the VSC warning lights came on is that when the tires were removed some error code was generated that said rear tires were spinning relative to the front--but these codes were in the background and the warning lights did not come on until the check engine light came on.   When I fixed the check engine light as described above the VSC warning lights went out and stayed off. Some of the other forums showed pictures of the location of the MAF sensor, what it looks like dirty and after cleaning, and other detailed steps if you need more information.    I hope this helps someone since I was able to do this myself for $6 instead of having the dealer replace the sensor for about $350-400. Replies to this message: mcclearyfl (Apr 20, 2009 2:41 pm)
#293 of 353 Re: 2000 Avalon check engine light [selffixer] by mcclearyfl Apr 20, 2009 (2:41 pm)
Replying to: selffixer (Apr 20, 2009 7:51 am) I had exactly the same problem, but after I drove home and parked the vehicle overnight, everything was OK.   At 88,000 miles I am surprised that you haven't yet run into a problem with the Idle Air Control. Unlike the conveniently positioned MAF, the IAC is on the underside of the intake plumbing and involves quite a bit of work to extract it and clean it. If you ever need to do this job, I have a step-by-step on this site.
#294 of 353 Catalytic converter problems? by bobgwtw Apr 20, 2009 (4:31 pm)
I Have an error code on my 06 avalon - 137,000 miles - that says the left bank catalytic converter is bad. Yet, after I drive the car for a day or so, usually quite a few miles, the check engine light goes out & I can drive a week or so with the light off; then it comes on again. No real pattern to the time or miles between events.   I've had it coded 3 times & the code is always the same. Seems to me that this problem would not be occurring intermittently if the convertor was truly bad. Would like to avoid the $1100. expense of a new convertor if possible, as I'm ready to sell or trade the car this summer.   Any ideas? Replies to this message: fin (Apr 21, 2009 7:30 pm) bobgwtw (Apr 22, 2009 7:53 pm)
#295 of 353 Re: Catalytic converter problems? [bobgwtw] by fin Apr 21, 2009 (7:30 pm)
Replying to: bobgwtw (Apr 20, 2009 4:31 pm) More than likely the code is one of the O2 sensors reading a malfunction. Before replacing the converter try replacing all the O2 sensors. They do fail in time and yours are well past the point of possible failure at 137k miles.   Before doing anything, however, try this: Load the car, fill with premium gas, get some friends, find some hills and drive the car at highway speed for at least an hour. Make the engine work. It is possible to burn off certain converter residue in this manner. This residue inside the converter can cause a failure code in the O2 sensors. If this works, good. If not, try the sensor replacement. If that fails, it is probably the converter..   This all assumes the car is otherwise properly tuned and maintained. Hope this helps. Replies to this message: bobgwtw (Apr 22, 2009 7:53 pm)
#296 of 353 Re: Catalytic converter problems? [fin] by bobgwtw Apr 22, 2009 (7:53 pm)
Replying to: fin (Apr 21, 2009 7:30 pm) Thanks for the suggestions. The car lives on the road 8-900 miles a week & probably 80% of that at 65-75 MPH; so the converter residue makes a lot of sense, especially since there is no code for the O2 sensors. I'll follow your suggestions & let you know the results.
#297 of 353 Re: Avalon Oil Leak-VVT Oil Line Issue-TSB [luckykrc] by aveprobs May 14, 2009 (9:02 pm)
Replying to: luckykrc (Feb 28, 2009 7:01 pm) I have a 2005 avalon or should i say had!! With no indication what so ever my engine threw a rod driving down the interstate (april 21st 2009). All my engine oil poured out of my vech. within one day. Never had i saw a drop of oil! I assume it was the vvti line. my vech has 65k and is NOT under warrenty. Toyota refuses to help after numberous corp. complaints. 8k for a used eng. or 14k new! THis is absolutely ridiculous.. There are thousands of us out there! right now there are 4 avalons in beck toyota service. serveral of which for the same problem. unfortunately I had no indication this would happen. I think its crazy that service bullitin was published and no recall was done!! Toyota service did multiple inspections on my vech and never upgraded my vvti line like the bullitin mentions.. I've been driving a rental for 3 weeks $165 a week!! plus my 475 car pmt! Any suggestions?? google vvti line on toy avalon and there are thousands of complaints.   Please help me someone!! toyota never again!

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