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Timing Belt Marks and TDC...

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Old Nov 28, 2009 | 12:14 AM
  #1  
RetchedOne's Avatar
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From: Federal Way, WA
Timing Belt Marks and TDC...

So I'm installing a new long block 3VZE into my 90 4Runner right now...

The FSM, and all the postings I've searched/read say TDC is when you align the mark on the timing belt gear on the crank straight up with the oil pump mark... Correct?

Like this --->


Then I align both cam marks with their marks on the metal backing, all the slack is at the tensioner.

I rotated the motor several dozen times (no joke) and the marks all seem to stay lined up... after 20+ times around, the cam gears always stop on their marks together and the crank is "straight up" when the cam marks are "straight up"

Those damn marks on the timing belt threw me off... I was putting the belt on, and lineing them up... rotate the motor over a few turns... and they were off...

So i came to the (conclusion after reading here) that those marks are just to get you started, and not to be followed past that.

Did i do it right? I really dont want to take it all apart again...


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Old Nov 28, 2009 | 12:57 AM
  #2  
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From: Calgary, AB
Yeah, the marks on the belt themselves won't be correct after a rotation. They're only there as a starting point when first installing the belt.
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Old Nov 28, 2009 | 08:11 AM
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From: Federal Way, WA
great thanks,

And if the timing marks are all lined up with the marks on the motor, I can install the distributor so it's pointing at #1 on the cap correct?
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Old Nov 28, 2009 | 09:55 AM
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From: Anchorage
Line up the crank and cam marks and you will be at TDC of the compression stroke, which is necessary before distributor installation. The FSM has a good description of the installation process in the IG section. Here is a picture of the rotor when the distributor is installed properly: https://www.yotatech.com/forums/f116.../#post51273447
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Old Nov 29, 2009 | 05:33 AM
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From: GA
this may help you with your replacement.I did my timing belt replacement over the summer, and took lots of pics with step by step instructions of how I did min., you can scroll down to where you see the timing belt install part......GL
https://www.yotatech.com/forums/f116...s-pics-183911/
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Old Nov 29, 2009 | 10:38 AM
  #6  
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From: Federal Way, WA
Originally Posted by buckz6319
this may help you with your replacement.I did my timing belt replacement over the summer, and took lots of pics with step by step instructions of how I did min., you can scroll down to where you see the timing belt install part......GL
https://www.yotatech.com/forums/f116...s-pics-183911/

I think i looked at this post 20 times... LOL
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Old Nov 29, 2009 | 10:59 AM
  #7  
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From: GA
Originally Posted by RetchedOne
I think i looked at this post 20 times... LOL
cool.........
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Old Nov 29, 2009 | 09:39 PM
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From: prince rupert
re/re timing belt...

i did my timing belt at 120000 kms, I am now at 185000 ...I have the directions for it ....I also replace the water pump...cause while it's open I replaced it cause idon't wanna open it up again the 2nd time......give me your fax # and i'll fax it to you k
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Old Nov 29, 2009 | 09:40 PM
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From: prince rupert
re/re timing belt...

i did my timing belt at 120000 kms, I am now at 185000 ...I have the directions for it ....I also replace the water pump...cause while it's open I replaced it cause idon't wanna open it up again the 2nd time......give me your fax # and i'll fax it to you k
by the way I have a 2000 4runner ltd
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