Timing belt half a notch off? - Toyota Nation Forum : Toyota Car and Truck Forums
3rd & 4th Generation (19921996 & 19972001) Toyota Camry Discussion for years: 1992-1996 & 1997-2001 Topics of discussion range from fuel economy, safety, modifications, performance all involving America's favorite family car, the Toyota Camry.

 
LinkBack Thread Tools Display Modes
#1 Old 07-16-2013, 11:15 AM
New TN User
 
Join Date: May 2011
Location: Lee, NH
Posts: 13
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
iTrader Score: 0 reviews
(Thread Starter)
Timing belt half a notch off?

Hey folks, I'm still working on finishing up the project dz63 outlined here

It seems like I have to put the timing belt on 1/2 notch off perfect. When I've got 0 TDC lined up on the crankshaft and the camshaft, I can't get the belt on with the top (Camshaft to the water pump) in tension. If I put the belt on with the marks perfectly lined up, then I have slack up there that makes me worry the water pump will slip.

I moved the crankshaft 1/2 notch clockwise and put it on with the proper tension. The engine started and I ran it up to 3k rpm, and it seems alright.

I'm going to move forward, but I wanted to bounce it off you guys and see if I had cause for concern- If I'm off half a notch, will the motor still perform under load? How should I straighten it out if it is off by half a notch?

Thanks!
Torgmada is offline  
Sponsored Links
Advertisement
 
#2 Old 07-16-2013, 11:19 AM
New TN User
 
Join Date: May 2011
Location: Lee, NH
Posts: 13
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
iTrader Score: 0 reviews
(Thread Starter)
d
Torgmada is offline  
#3 Old 07-16-2013, 11:26 AM
Official TN Member
 
Join Date: Sep 2011
Location: PDX
Posts: 732
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 90 Times in 83 Posts
iTrader Score: 0 reviews
half notch? thats impossible! Dropping one notch off is common on TB change when tensioning up, I had to set two notches up so it dropped to correct position when I tensioned it.Definitely bring up to correct tension unless you like drama... at least you won't nuke engine like Hondas
tedmich is offline  
#4 Old 07-16-2013, 12:23 PM
Senior TN Member
 
Join Date: Jul 2012
Location: Canada
Posts: 1,500
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 32
Thanked 315 Times in 289 Posts
iTrader Score: 0 reviews
Install belt with timing marks aligned as best you can.

release tensioner so it can tighten belt

Rotate crank TWO times clockwise until it is back at TDC again, check Cam mark.

Rotating takes out the slack in the oil pump side

Should be dead on, or off by a full tooth if you missed it, re-adjust for that and repeat

Timing mark for Cam is at 12:00 on the cam bearing cap, it is a "V" notch, not a stamp mark, or circle.
RonR is offline  
#5 Old 07-16-2013, 03:57 PM
Official TN Member
 
Join Date: Apr 2013
Location: annapolis md
Posts: 181
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 13
Thanked 12 Times in 12 Posts
iTrader Score: 0 reviews
I did exactly what you did; slightly advanced cam to get the timing to line up during rotation. I now have a little too much slack from the cam to the water pump. With the cover on, you cannot hear it, but when the cover is off it makes a little floppy sound. I have read that one solution to this problem is to have an assistant push down on the belt to tension when installing. I'm not sure if you would advance the cam a tooth in that case. I have heard anecdotal evidence that improperly tensioned belts wear faster than regular belts. Aftermarket nitrile belts will probably be much less affected by the variable tension due to its increased strength and less flex. As far as whether it retards ignition timing, it probably depends. If the belt stretches, i.e. oem belt, then it probably would a little at first and more over time until its premature failure. But, if it doesn't stretch, i.e. aftermarket nitrile, then it should not affect your ignition timing at all and probably would last. At least that's the theory, of course nothing beats a timing light and a properly tensioned quality aftermarket nitrile belt.
cblinnen is offline  
#6 Old 07-16-2013, 04:09 PM
Official TN Member
 
Join Date: Jul 2008
Location: NC
Posts: 75
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 3 Times in 3 Posts
iTrader Score: 0 reviews
I had the same problem. I put my cam on the mark, put the crank on "0". I put the belt om the crank first, cam second and it was very tight pulling it over the teeth. then I pulled the slack with the tensioner, checked the the crank and cam marks. The first time they were off and I did it again. Then I tightened the tensioner and turned the crank 4 full turns, checked the marks and tension. Everything was good.
firstforme is offline  
#7 Old 07-16-2013, 04:27 PM
Senior TN Member
 
Join Date: Jun 2009
Location: NE Arkansas
Posts: 1,022
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 34
Thanked 111 Times in 104 Posts
iTrader Score: 0 reviews
They almost always end up a tooth or two off for me, hondas, toyota, ect. I line 'em up but after releasing the tensioner, they are off.

What I've been doing is, release the tensioner again, then hold the crank with one ratchet, and turn the cam with another, with the belt still on. since the belt is loose, it can and will skip a tooth when you do this.

And then it's dead on.

1995 Chevrolet 1/2ton ext cab 4x4 6.5l Turbo Diesel
1998 Toyota Camry 5SFE Auto
2002 Chevrolet Impala
1997 Nissan Pathfinder 4x4
bolink654 is offline  
#8 Old 07-19-2013, 07:22 PM
New TN User
 
Join Date: May 2011
Location: Lee, NH
Posts: 13
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
iTrader Score: 0 reviews
(Thread Starter)
Thanks guys! Great info!

I went ahead and put the car back together pretty much how I initially described.

It's been running fine but I do have a check engine light on- I'm tired of working on the car so I'm going to let it slide for now (I can check the code, I'm just sick of working on it.)

I have till october- next state inspection- to fix that check engine light. If it's because the timing is just a hair off, I'll definitely use your advice to straighten it out.

Cblinnen, it sounds like our belts are set up exactly the same now. Bolink, I'm going to use your trick if I have to go back in there.
Torgmada is offline  
#9 Old 07-19-2013, 07:46 PM
Senior TN Member
 
Join Date: Jun 2009
Location: NE Arkansas
Posts: 1,022
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 34
Thanked 111 Times in 104 Posts
iTrader Score: 0 reviews
I ran mine 2-3 tanks of gas with it 2 teeth off. Check engine light never came on.

1995 Chevrolet 1/2ton ext cab 4x4 6.5l Turbo Diesel
1998 Toyota Camry 5SFE Auto
2002 Chevrolet Impala
1997 Nissan Pathfinder 4x4
bolink654 is offline  
#10 Old 07-19-2013, 11:08 PM
Senior TN Member
 
Join Date: Jul 2012
Location: Canada
Posts: 1,500
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 32
Thanked 315 Times in 289 Posts
iTrader Score: 0 reviews
Check the CPS(cam position sensor) wires, its on the back side of the engine near the Cam gear, it is often overlooked when connecting things back up.
engine will run ok, just better if it's hooked up and CEL will turn off if reset.

Reset CEL by unhooking battery's Negative cable for 5 minutes.
RonR is offline  
Sponsored Links
Advertisement
 
Reply

  Toyota Nation Forum : Toyota Car and Truck Forums > Toyota Passenger and Sports Car Forums > Camry and Solara Forum > 3rd & 4th Generation (19921996 & 19972001)

Bookmarks

User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not 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