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Old 10-09-2004, 02:49 PM
Q Q is offline
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Join Date: Aug 2000
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Timing chain order of events


I can't seem to logically figure out what is the best order of events to complete my timing chain install. I am replacing the chaing, guides and tensioner.

Tensioner has to be out for the cam sprockets to come off, right?

Thinking in this order. Please correct me where I'm wrong.

Remove old tensioner
Mark chain and cam sprockets
Remove left cam sprocket
Replace guides
Reinstall sprocket
Same for right side
Install new tensioner
Feed new chain through

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Old 10-09-2004, 04:32 PM
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Old 10-09-2004, 09:06 PM
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The left (passenger) sprocket does not need to be removed, to get at the guide rails at least on a v8. Also, theres some of debate about the need to change out the lower guide rails as they do not wear as quickly as the upper rails. Stevebfl's post here Will someone please look at this parts list from Fastlane andmake sure it's all there convinced me I didnt need to do the extra work on my 87 420.

Pindenski has a great section/tutorial on changing the timing chain on a 126 V8. paying the $29 for a subcription to his site was worth it just for this information. The only imporvement I made to his method was that after I took off the right sprocket to get at the guide rails, I used a bungee cord on the chain to keep it taught (he uses cable ties) . I attached the bungee cord to the garage door guide rails overhead. This kept the chain in contact with the lower spockets but allowed me some wiggle room to move the chain out of the way when I needed to install the guide rods. His site is

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