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Old 12-26-2010, 07:44 PM   #1
arendsg
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Dizzy Replace timing belt on 03 Lw300

I know it must be somewhere on this fourm, but I would like to attempt replacing this belt. I have never done this before, but it looks like a lots of labour job, I would like to hear from people who have done this job? My car is a LW300 with a V6.

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Old 12-26-2010, 09:38 PM   #2
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Default Re: Replace timing belt on 03 Lw300

Keep looking. Its right here in past threads of members posting pics and tips.

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Old 12-27-2010, 12:41 PM   #3
ernesto rex
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Default Re: Replace timing belt on 03 Lw300

Morning arendsg,

Here is a post I published back in 2008 detailing my timing belt adventure.

http://www.saturnfans.com/forums/sho...ht=timing+belt

I have now moved on to the lag bolt method of holding the camshaft gears in place. I didn't like the slight movement I had with the number four cam gear when I took the old belt off. Lag bolts with a rubber washer held all gears solidly in place.

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Old 12-27-2010, 05:22 PM   #4
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Default Re: Replace timing belt on 03 Lw300

Hey ER maybe you could post an updated How-To with your new method. While I don't have a 3.0 I am sure there are some on this forum who would find this useful. Note - Charlie sometimes will relocate a good How-To to the Technical Help Forum, so people need to search those for a specific fix as well.

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Old 12-28-2010, 11:28 AM   #5
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Default Re: Replace timing belt on 03 Lw300

You can also read my thread about doing this job for the first time as a L81 newbie, and the success I had with the help of the veterans here!

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Old 12-28-2010, 12:16 PM   #6
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Default Re: Replace timing belt on 03 Lw300

I would highly recommend reading the thread posted by Mechanized titled "Water Pump question - L81 motor". Here is a link to it.


http://www.saturnfans.com/forums/sho...d.php?t=161098


Lots of great info on what to watch out for, and how to stick with the job in the face of adversity. Get-r-done at it's finest!

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Old 12-29-2010, 06:05 AM   #7
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Default Re: Replace timing belt on 03 Lw300

I purchased an AllDataDIY.com subscription for my 2000 L-Series wagon with the L81 engine. It costs about $20 but was well worth it for the timing belt job. I got my parts from RockAuto.com and was pleased with the quality of the belt (Gates), pulleys and tensioner assembly. I searched this site and found pix of the carriage bolt method to hold the cams in place. That worked swell for me. You will want to replace the water pump while you are in there. The only special tool I had to buy was the E20 (?) Torx for the crank bolt. I got it from NAPA. I have pix of the old and new belt with timing marks, but cannot post them until I have made 15 posts.

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Old 12-29-2010, 08:27 AM   #8
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Default Re: Replace timing belt on 03 Lw300

I found the E10 and E12 more important - and used a 6 point 5/8" socket for the crank. But to each his own.

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Old 12-29-2010, 10:57 AM   #9
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Default Re: Replace timing belt on 03 Lw300

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I found the E10 and E12 more important - and used a 6 point 5/8" socket for the crank. But to each his own.
Yes, you are right, you can't get anywhere with this engine (without making a mess) without the E10 and E12. I had a "regular" set of E-Torx that I didn't consider special tools, but, like everyone else's set, they only went up to E-18. I used a pair of CV boot pliers for the stock stainless clamps.

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Old 12-29-2010, 07:46 PM   #10
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Default Re: Replace timing belt on 03 Lw300

We rent the tool..so someone will claim we are biased. That said..

We got this email the other day. I bet he wishes he had used the kit-

"........I found your website looking for help. I am working on an L81 timing belt, with out the special tool.

I used zip ties to hold the cam gears and got the new belt on, but I am off a couple teeth, so I know thats not correct.
Before I rent your tool I need to know if I ruined this engine.

With the 'incorrect' belt placed on, I could turn the motor by hand clockwise. But the marks were off so I removed the belt again.
Now with the cam gear marks all over the place, I tried to turn each cam gear separately to line up with the upper mark, held the cams in place again, but now with the belt on the bottom end is hitting somewhere. I did not force it of course. I can just tell it is starting to hit........."

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Old 12-30-2010, 12:58 PM   #11
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Default Re: Replace timing belt on 03 Lw300

Having done two Saturn L81 engine timing belt changes, I'll be the first to admit you take some risks by not having all the factory tools at hand. But I think you can really reduce that risk by doing a few things.

First step is to not be in a hurry. Go into this project with the attitude that you will not have this car to drive for two days, even if it is a one day project.

Second is to take lots of high resolution digital pictures of how you find the engine markings when taking it apart. Concentrate on where the timing markings are positioned for the cam gears, crankshaft and timing belt tensioner before loosening or removing anything. Use a white laundry marker to refresh the old marks so they show up nice in a photo. The theory here is if the car ran for 100,000 miles with the markings aligned like that, then it will run fine if you put it back together the way you found it.

Third is to not be afraid of counting the teeth between the markings you freshened up on the old belt and to make sure your new belt counts the same way. I must have counted each belt three times. And, I even had to make my own markings on the new belt while doing the second L81. I'm not sure why it didn't come with markings already, but my laundry marker and tooth counts got me through it.

Even with all the photos and checks, I still request some divine oversight prior to starting the engine up for the first time.

Just being thorough.

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Old 01-06-2011, 11:03 PM   #12
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Default Re: Replace timing belt on 03 Lw300

I'm not sure if you completed this task but this might help if you have the time to wait for it,
sorry couldn't send the whole URL tooldiscounter.com/ItemDisplay.cfm?lookup=OTC6687&source=froogle&kw=O TC6687[/url]
This tool kit is worth every dollar, I found the most tedious part being cam aligment using the figure 8 tool it took a couple of hrs. I tried to attach the insturctions, if they did not attach you can find them at the OTC web site under OTC6687 search.

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Old 01-07-2011, 01:06 PM   #13
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Default Re: Replace timing belt on 03 Lw300

http://www.tooldiscounter.com/ItemDi...lookup=OTC6687.

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Old 01-25-2011, 12:46 AM   #14
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Default Re: Replace timing belt on 03 Lw300

Does anyone have a picture/link/explanation of the "lag bolt" method of holding the gears in place? What is the carrage bolt method?

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Old 01-25-2011, 09:13 AM   #15
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Default Re: Replace timing belt on 03 Lw300

Search past threads as members posted pictures.

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Old 01-26-2011, 05:19 PM   #16
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Default Re: Replace timing belt on 03 Lw300

Quote:
Originally Posted by fdryer View Post
Here is the link to the OTC tool instructions.
http://www2.otctools.com/otctools.co...cts/537764.pdf

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Old 01-27-2011, 12:32 AM   #17
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Default Re: Replace timing belt on 03 Lw300

Quote:
Originally Posted by TheMammster View Post
Does anyone have a picture/link/explanation of the "lag bolt" method of holding the gears in place? What is the carrage bolt method?
For each set of cams, the carriage bolt method involves slipping a carriage bolt up between the two cam sprockets as far as it will go with the head of the bolt towards the engine and the bolt threads extending out beyond the face of the cam sprockets. Be careful that the square shank under the head of the carriage bolt is fit up between the sprockets and does NOT bear against the inside faces of the sprockets. You want only the flat surface under the head of the bolt (seen in the image below with concentric grooves) to bear on the inside faces of the sprockets. I bought regular 5/16" flat washers, wide (1-5/8") flat fender washers, and 1-1/2" flat rubber washers. The bolts I used were 5/16" diameter, 2" in length. The fender washer distributes the load evenly on the rubber washer. The rubber washer bears against the face of the sprockets to provide "bite" and minimize the tendency to slip.

In the image below, you can see the marks left on the rubber washer by the cam sprockets when it was installed. You just loosely assemble the clamp, place it between the sprockets, and tighten the nut to immobilize the cam sprockets as needed during installation of the new belt. Don't use more force than needed to immobilize the sprockets.

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Old 01-28-2011, 12:00 AM   #18
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Default Re: Replace timing belt on 03 Lw300

[QUOTE=bill buttermore;1705935]For each set of cams, the carriage bolt method involves slipping a carriage bolt up between the two cam sprockets as far as it will go with the head of the bolt towards the engine and the bolt threads extending out beyond the face of the cam sprockets. Be careful that the square shank under the head of the carriage bolt is fit up between the sprockets and does NOT bear against the inside faces of the sprockets. You want only the flat surface under the head of the bolt (seen in the image below with concentric grooves) to bear on the inside faces of the sprockets. I bought regular 5/16" flat washers, wide (1-5/8") flat fender washers, and 1-1/2" flat rubber washers. The bolts I used were 5/16" diameter, 2" in length. The fender washer distributes the load evenly on the rubber washer. The rubber washer bears against the face of the sprockets to provide "bite" and minimize the tendency to slip.

In the image below, you can see the marks left on the rubber washer by the cam sprockets when it was installed. You just loosely assemble the clamp, place it between the sprockets, and tighten the nut to immobilize the cam sprockets as needed during installation of the new belt. Don't use more force than needed to immobilize the sprockets.


Thanks, that is exactly what we needed. TheMammster

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Old 02-03-2011, 01:01 PM   #19
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Default Re: Replace timing belt on 03 Lw300

we replaced the timing belt last weekend on my L300 2003 sedan
it took 6 hours but saved a ton of money
there are lot of posts on this subject
i remember asking for help and for photos that helped

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Old 02-03-2011, 11:23 PM   #20
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Default Re: Replace timing belt on 03 Lw300

Glad to hear you got it done.

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