Is the timing belt supposed to be a bit loose in between the camshaft pulleys? - Lexus IS Forum
User Tag List

 
LinkBack Thread Tools
post #1 of 3 (permalink) Old 12-01-2013, 12:43 AM Thread Starter
Fiend
 
Join Date: Nov 2009
Posts: 308
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
           
Is the timing belt supposed to be a bit loose in between the camshaft pulleys?

hey guys, like the title says, i was checking my belts because it was making a weird noise like the belt is broken or worn or something, i took the t belt cover off and in between the 2 cam shaft pulleys, the belt is pretty loose, i could poke it lightly and it will show looseness in the belts.. is this normal?? timing belt was replaced 10k kms ago and still looks brand new
phucmang is offline  
Sponsored Links
Advertisement
 
post #2 of 3 (permalink) Old 12-01-2013, 10:22 AM
Immortal
 
Join Date: Aug 2009
Location: Pittsbugh PA
Posts: 19,387
Mentioned: 2 Post(s)
Tagged: 1 Thread(s)
Quoted: 27 Post(s)
           
I replaced mine a couple years ago. You may have almost a " in deflection between both gears, but with moderate force applied using your thumb. Here is me pushing up on it using a pretty good amount of force with just my thumb, as you can see I could NOT get enough slack to where the TB could lift as high as the back plate lip and touch it. I'm sorry if this isn't an accurate answer but I would think if you can lift the belt up high enough to meet the back plate, then I think there's a tension problem. I forget if there is an indicator on the hydraulic tensioner like there is on the spring loaded serp belt tensioner. Otherwise i think you're ok.

'02 IS300 MSM LSD

Last edited by jasonm4; 12-01-2013 at 11:44 AM.
jasonm4 is offline  
post #3 of 3 (permalink) Old 12-03-2013, 01:46 PM
Guru
 
Join Date: Dec 2000
Location: Cleveland, OH Forum Mod: Mobiletronics
Posts: 8,725
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 9 Post(s)
           
Looseness between cams will be normal as they do rotate and are not fixed to each other. And the VVTI gear is also not fixed to the intake cam, as it will adjust valve timing by changing its relation to the cam gear.

SOLD: '03 GGP Manual IS300 97K Miles
- SRT HFI, B&M Shifter, Colgan Mask, Alpine F340 Amp, Infinity Kappa Speakers, 2-Din MP3 Player
- CompuStar 2W900FM-AS Alarm/Remote Start, Optima Red Top battery, White LED Interior
- Koni Yellow Adjustable, Eibach Pro Springs

'13 NGP RX450h
'15 WRX STI Limited
vlad_a is offline  
Sponsored Links
Advertisement
 
Reply

  Lexus IS Forum > Lexus IS > Basic Help & Repair

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Lexus IS Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself. If your address is invalid, you will likely lose access to the site.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Current users viewing this Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome