vidlev

My car (98 LS400) has been experiencing vibration throughout the low RPM range, especially while at idle (about 350-400rpm). After much research, my best guess is that the motor mounts need to be replaced. Before I order the mounts, I want to be sure I have the correct ones - see the link below:

http://toyolexparts.com/index.php/ge...1990-2000.html

Are both the engine mounts the exact same part, hence this "engine mount set" will be all I need to do the job? Or do I need to find the front and rear mounts separately?

Yamae

According to my parts data for a JDM, both R and L use the same parts.
UCF20/21 11/97～08/00 P/N 12361-50140

for a older UCF20/21 model, as follows.
UCF20/21 10/94～11/97 P/N 12361-50100

As far as I was informed, 12361-50140 is a redesigned one for a VVT engine.

For early models
UCF10/11 11/89～ 02/94 P/N 12361-50021

qha_vn

you may want to replace the rear mount (as known as transmission mount) at the same time for best result. I just replaced them all, back to "lexus ride" now

vidlev

Yamae - are you sure on that part number for the VVT engine? A google search for "12361-50140 ls400" doesn't net me much. While the other part number "12361-50100 LS400" generates a ton of hits.

Good to know that the two engine mounts are identical parts, and there is no difference for R and L.

My transmission mount was replaced just last year so I'll be passing on that for now

timmy0tool

iTrader: (7)

correct, the transmission mount is cheaper and much easier to replace, and accounts for roughly 70-80% of the vibrations!

Yamae

See the page below and you will know that a VVT engine needs two 12361-50140. It's the Russian language partly though.
http://toyota.epcdata.ru/celsior/ucf...ne/1107/12361/

Yamae

There are different engine mounts for UCF20/21. 12361-50021, 12361-50100, 12361-50101, 12361-50140, 12361-50141.

A 12361-50140 or 12361-50141 is an improved one to match for a VVT engine.
Mechanically you can use 12361-50100 or 12361-50101 for your car but it may show some difference of performance. A different part number sure means some difference of the part.

The final figure 0 / 1 means the difference of the manufacturer, I was informed.

vidlev

wow, thanks for the info - this board never ceases to impress me with the knowledge of its members.

Not sure where I'll be able to buy the 12361-50140 or 12361-50141, so I may just have to get the 12361-50100 as I can find purchase links for that part. Thanks again Yamae, you are my clublexus savior, for the second time now.

billydpowe

iTrader: (1)

just as a note, my 99 mounts were replaced about 4 years ago and were in two pieces (at about 130+k)

djamps

I suspect mine are in multiple pieces given 200k miles... but the trans mount solved 99% of the vibration issues so I stopped there .

billydpowe

iTrader: (1)

if your engine mounts are bad it wont be long before you need ANOTHER tranny mount... think it over

sha4000

iTrader: (1)

The 12361-50100 or 50101 is correct.
http://www.lexussouthatlantaparts.co...236150101.html

djamps

Yea, I know -- I even have new ones sitting on the bench LOL... waiting until I have more time/motivation to install them. Probably once the trans mount goes again :P

jaaa

Those look totally shot. What were the symptoms and ride quality of the car with the mounts broken like that?

billydpowe

iTrader: (1)

vibration at 70ish and a hard stop and loose shift lever, you could feel movement if your hand was on the shift ****