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How to set the timing and balance shaft belts on a 924S/944

 
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edredas  



Joined: 09 Dec 2004
Posts: 839
Location: Charlotte, NC

PostPosted: Sun Aug 18, 2013 1:04 pm    Post subject: How to set the timing and balance shaft belts on a 924S/944 Reply with quote

Ok, I didn't know what to call this thread, but this is not a "how to install, or tension the belts". This is only how to get the timing marks to line up flawlessly with very little effort... I've seen guys trying to rock the crank back and forth, or even try and stretch the belt over the sprockets in hopes they could get it to line up.

Anyway, I've been meaning to do this thread for a long time and I hope that it will save people alot of time and effort. I can change these belts in about 10 minutes with these procedures and they work great, enjoy!

Also, before rotating the cam, you must make sure the crank is at TDC. Don't worry about rotating the cam this tiny bit, this is how professionals install belts.

If you follow these steps you will have no problems, but I'm not liable if you mess up. As mentioned, these instructions do not include how to tension the belts, but you can find hundreds of write ups across the web that cover that.


Part One:

The timing belt...















_________________
'86 944 -Garnet, Fully loaded, Koni suspension
'87 924S -Red, 300hp 951 swap
'87 924S -Red, New Project
'87 924S -White, Automatic
'88 924S -Red, Daily Driver, Bone stock
'93 Mx6 -White, Megan Racing suspension


Last edited by edredas on Sun Aug 18, 2013 1:21 pm; edited 1 time in total
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edredas  



Joined: 09 Dec 2004
Posts: 839
Location: Charlotte, NC

PostPosted: Sun Aug 18, 2013 1:04 pm    Post subject: Reply with quote

Part Two:

The balance shafts!






The timing marks are on the back of the sprocket and plastic belt cover.

Below I have the upper shaft set to -10 degrees or ~1 tooth CCW.



Here's a better look at the timing marks. Notice the line on the face points to the notch on the back of the sprocket. Do not use the "0".


The lower balance shaft timing mark is also on the belt cover, and is just visible below.




Make sure you have the belt installed around the lower BS and tensioner, then lift up on the belt to pull all the slack to the top area and hold it as you perform step 3.




In this photo you can kinda see how the slack has been moved to the lower right side of the shaft.




Here you can see the lower balance shaft and the slack coming off the crank.




Don't be too upset if you can't get step 5 to work, just turn the lower balance shaft and you're ready to set the tension.
_________________
'86 944 -Garnet, Fully loaded, Koni suspension
'87 924S -Red, 300hp 951 swap
'87 924S -Red, New Project
'87 924S -White, Automatic
'88 924S -Red, Daily Driver, Bone stock
'93 Mx6 -White, Megan Racing suspension


Last edited by edredas on Fri Oct 04, 2013 5:17 am; edited 5 times in total
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peterld  



Joined: 10 Dec 2006
Posts: 630
Location: Noosa Heads QLD Australia

PostPosted: Sun Aug 18, 2013 10:17 pm    Post subject: Reply with quote

Great write-up red ass Ed! Thank you.
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PhoenixOO10  



Joined: 10 Jul 2009
Posts: 12
Location: Portage, IN

PostPosted: Mon Aug 19, 2013 4:48 pm    Post subject: Reply with quote

This is great! As someone that is not a very experienced mechanic, i can not thank you enough for this. Bravo, good sir, bravo.
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1988 924S - everyday driver.
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hdrider19  



Joined: 03 May 2016
Posts: 151
Location: Catawissa Missouri(40 mi sw of St Louis)

PostPosted: Sun Mar 19, 2017 3:51 am    Post subject: Reply with quote

Now you have me thinking I should pull the covers off and reset my belts before 1st startup. Another great tip.
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