Question about 2001 Toyota Sienna

6 Answers

I have a 1999 Toyota sienna with about 180,000 miles on it. My wife accelerated from a stop light, heard a pop from the front and the car now has a very loud vibration when the transmission is in drive and you are at a stop. When you accelerate it quiets down. It does not vibrate in neutral or park. If you accelerate hard it will pop loudly. I suspect a motor/tranny mount but how many are there and how do you know which one is bad?

Posted by on

  • 5 more comments 
  • mcollum63 Jul 05, 2010

    This is a 1999 Toyota Sienna. How many motor mounts are there and where are they located?

  • mcollum63 Jul 05, 2010

    There are 3 mounts that I have heard about: A "dog bone" that i can see top left (passenger side), there is one at the front of the engine that is a large rubber mount. I see nothing like the mount shown in the parts house link just provided. There must be a front and rear mount. Which one is which? Is there a Toyota expert on the line?

  • mcollum63 Jul 05, 2010

    This is a 3.0 six cylinder engine. Not a 4 cylinder. Please respond only if you are a Toyota expert and have actually worked on a Sienna and have actually seen these mounts. Thanks

  • mcollum63 Jul 05, 2010

    Too many different answers. Is there one in the front and one in the back? Two in the front and one in the back? What is the "dog bone" support that is in the top left,(passenger side) of the engine compartment? I need a Toyota pro!

  • mcollum63 Jul 06, 2010

    I give up. I don't happen to have a cherry picker and have never had to use one on rear wheel drive cars when replacing mounts. I am asking specifically about Siennas. It's evidently not too hard to become a resource on this site.

  • mcollum63 Jul 06, 2010

    Saailer new the set-up for the Sienna and was very specific in trying to help. Don't talk in generalities, front wheel and rear wheel drive are very different animals

  • mcollum63 Jul 06, 2010

    Thanks, Saailer. I'll give it another shot at higher revs and let ya know.

×

6 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Toyota Expert
  • 1,868 Answers

Hello! solution on the way....guru...........saailer

Posted on Jul 06, 2010

  • 1 more comment 
  • David Burbee
    David Burbee Jul 06, 2010

    Hello! There is a; Front engine mount...A rear engine mount...An engine absorber mount...And a transmission mount (left side only)...The front engine mount is most suspect,,,It uses color coded bolts...Green and Silver...Start the engine...Place in drive with foot down hard on the brake...While someone watches the front mount....Press down on the gas...The engine/trans-axle assembly will rise up and then drop when gas is released...Indicating a broken mount...watch closely as this process is repeated...You will hear and see the abnormal movement...Which will identify the bad mount (if not the front)...Below are torque specs,

    Green bolt...48 # ft.....Silver 32# ft. 2 bolts engine absorber mount...35# ft....Rear motor mount 4 nuts... 2 grommets...45# ft. Left transmission mount...4 nuts...2 grommets...59# ft.


    Guru...............Saailer


  • mcollum63 Jul 06, 2010

    Thanks, Saailer. You are finally talking in specifics. Everyone else was talking in generalities. These front wheel vehicle mounts are very different than rear wheel drive. When I am looking into the engine bay there is also a support near the back left fire-wall up high that some refer to as a "Dog-Bone" because of its shape. What are the chances that it is the problem? I'm thinking it's not likely but I don't want to buy un-needed parts and spend the time installing them to no avail. I hate to guess!



    I have tried to take the pressure off of the mounts by placing a wood block and jacking up the motor but I cannot find any play in the mounts. The engine does have some movement at the front mount when placed in to drive with the brake on but I can't replicate the metal to metal POP that happens when in real driving conditions from a stoplight to accelerate scenario.



    The transmission mount on the driver side has some rubber to metal separation but no "play".



    Thanks,



    Max

  • David Burbee
    David Burbee Jul 06, 2010

    Hello! Guessing cost to much! Let's try the same test only while holding hard on the brake bring rev's up high and release quickly...Quickly bring rev's high again and release quickly...Repeat this rapidly several times while looking and listening...The "dog bone" is the Torque Strut Mount...If broken it would account for the hard metal sound...www.rockauto.com has them for $50 + shipping (best price)...The front mount isn't to difficult to replace but the rear mount is a royal pain...Attempting the re-test with a little more "smack" may show the bad component...I have always performed this test hard and quick...

    However the more I look at this the more I suspect the Torque Strut Mount...

    Send a comment.........saailer


×

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 2,272 Answers

Motor mount Supports made of hard rubber for the engine and transmission to be secured to the vehicle's frame. The engine and the transmission are mounted to the frame with vulcanized rubber and steel mounts. Engine mounts, commonly called motor mounts, can fail due to unusual stress and strain or because they have been contaminated by leaking oil. On some classic cars, when mounts fail the throttle linkage can bind up causing an unsafe condition. Later model motor mounts have a built-in limiter made of metal that prevents excessive movement of the engine when a mount fails. Newer cars also use throttle cables instead of linkage.
A loose or broken motor mount can cause vibration during acceleration. This is especially true during engagement of the clutch on a vehicle with a manually shifted transmission.
To test for broken motor mounts, two people are needed.

  • First, set the emergency brake firmly and double-check to see that it holds the vehicle against the torque of the engine.
  • While a helper puts the car in gear with the engine running, observe the mount on one side of the engine to see if the engine lifts off it.
WARNINGBe sure that you are at one side of the vehicle, and not in front of it.
  • Then, have the helper shift the transmission into reverse and check the mount on the other side of the engine.
  • To Replace:--
    • To replace motor mounts, they are unbolted and the engine is raised off them. you can use a mobile crane (cherry picker) to lift the engine. the mount is replaced with a new one.
    • Install the engine mount bolts loosely on the block. Leave them loose during engine installation so that the mounts can be more easily aligned with the frame mount brackets.
    • A rolling head pry bar is handy when aligning mounts. use the pointed end to line up the mount bolt holes before installing the mount bolts.
    • A rolling head pry-bar is helpful when aligning motor mounts.
      • Do not use the engine mount bolts to pull a V-type engine into place. Use shims if necessary to fill any gaps between the mount and block. The Automotive Engine Re-builders Association reports numerous cases of block distortion resulting in scuffed pistons in cylinders, near mount that were forced tight.
      • I have a 1999 Toyota - e5533c2.gif
      Thanks. Keep updated for any more query. You can rate this solution and show your appreciation.

Posted on Jul 05, 2010

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Toyota Master
  • 11,800 Answers

Yes, it's one of the mounds from the engine - 2 of them, one on each side - the rubber bushing is gone so now there's metal to metal contact. You hear it loudest at idle when in D or during the acceleration because then the transmission acts like a torque ***** for the engine tying it to the body so the vibrations of the engine are the greatest. The only way to know for sure which is to look at them while pushing on the engine  - the movement on the bad one will be clearly visible. 

Posted on Jul 05, 2010

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 524 Answers

That is exactly what i was thinking as a read your question but you already know that a mount is most likely the suspect. There is usually 2 mounts on a 4 cylinder engine. And usually one more under the transmission. I think most likely this is going to be a tranny mount before an engine mount but i could be mistaken. A bad mount is easy to locate as the rubber will be torn or pulled out and the engine will move freely inside the mount.

Here is an example of a bad motor mount from a toyota engine similar to yours. Hope this all helpsI have a 1999 Toyota - 293f679.jpg

Posted on Jul 05, 2010

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 8,197 Answers

There are 2 motor mounts on your car. They are located about center on the motor and attach to the chaise. As to see what one is bad you will not see the rubber bushing.

On the link below you can see what they look like.

http://www.autopartswarehouse.com/shop_parts/engine_mount/toyota/sienna.html

Good luck

Posted on Jul 05, 2010

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 10,319 Answers

Use a crow bar and examine each mount. If they move they need replacing. It is 11 years old now and I am sure one or more are bad by now. Pertaing to the date built you can have 3 to four mounts on yours which includes the engine. The torque is on the left side which will be toward the front of the car. Those mounts are probably shot and will move upon testing

Posted on Jul 05, 2010

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

VSC TAC light and Engine Check light on


http://www.toyota-global.com/innovation/safety_technology/safety_technology/technology_file/active/vsc.html

Jul 21, 2014 | Toyota Sienna Cars & Trucks

1 Answer

My 2007 Toyota Sienna shakes


ignition fault check replace spark plugs leads test it then coil packs

Feb 11, 2013 | Cars & Trucks

1 Answer

1999 toyota sienna, i cant find the instrumental panel can somebody tell me where isit located


The instrument panel (refered to as the "IP") is the panel of guages and warning lights that contains the speedometer and tachometer and gauges (if so equipped), it is located in front of the driver and is mounted into the dash.

Mar 15, 2011 | 1999 Toyota Sienna

1 Answer

My Toyota Sienna stays at 1000 rpms after completely coming to a stop at a stoplight and will move forward when i take my foot off the brake (on level surfaces). Also drives 15 - 25 miles per hour for 1/2...


If you have a CHECK ENGINE light on it is a bad sensor if there is no light check your floormat?? Sounds crazy but seen it before!!

Good luck hope this puts a stop to your problem!

Oct 23, 2009 | 2006 Toyota Sienna

2 Answers

When should you replace timing belt on Toyota Sienna van? It's a 1999 model with 210,000 kms on it and I need a new water pump. Should I replace the timing belt at the same time?


Somewhere between 90,000 mil;es and 120,000 miles you should do your timing belt. But first make sure you do not have a timg chain. If you have a timing chain, you never have to change it at all.

Sep 08, 2009 | 1999 Toyota Sienna

1 Answer

Toyota Sienna Power door - SAME THING


Here is a fix on a 1999 Sienna power door cable

Jun 27, 2009 | 2004 Toyota Sienna

Not finding what you are looking for?
2001 Toyota Sienna Logo

Related Topics:

2,095 people viewed this question

Ask a Question

Usually answered in minutes!

Top Toyota Experts

yadayada
yadayada

Level 3 Expert

75822 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8215 Answers

Are you a Toyota Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...