Timing chain position
10-09-2016, 06:05 AM
#1
Timing chain position
Hi guys,
I have a question about my timing chain.
I removed the head and pistons a while ago, had to turn the crank a few times in order to get to the rod bolts... and while doing this, the timing chain probably jumped some teeth on on the crank sprocket.
Now that I have my head installed again, I wanted to install the idler gear again. I'm just doing exactly as the book is telling me.
The crank pulley is positioned at TDC, so the idler gear must be mounted with the two stripes flat on deck.
In this position, the timing chain should be in a specific position. The chain has two black links, which on TDC should be positioned at the dot on the idler gear.
Like this: Paint skills
Thing is: because the chain probably jumped some teeth while turning the crank, the two black links are not positioned at the dot at TDC.
IMO it should'nt matter in what position the chain is, as long as the crank and idler gear are in the correct position.
But since the service manual is specifically referring to this chain position, I thought I'd ask for your opions.
I tried jumping the chain a few teeth on the crank... but that's not just gonna work
For that I'd have to remove the crank pulley and the timing chain cover plate. I'd prefer not to.
Hope someone can help me out here
Thanks!
Jasper
I have a question about my timing chain.
I removed the head and pistons a while ago, had to turn the crank a few times in order to get to the rod bolts... and while doing this, the timing chain probably jumped some teeth on on the crank sprocket.
Now that I have my head installed again, I wanted to install the idler gear again. I'm just doing exactly as the book is telling me.
The crank pulley is positioned at TDC, so the idler gear must be mounted with the two stripes flat on deck.
In this position, the timing chain should be in a specific position. The chain has two black links, which on TDC should be positioned at the dot on the idler gear.
Like this: Paint skills
Thing is: because the chain probably jumped some teeth while turning the crank, the two black links are not positioned at the dot at TDC.
IMO it should'nt matter in what position the chain is, as long as the crank and idler gear are in the correct position.
But since the service manual is specifically referring to this chain position, I thought I'd ask for your opions.
I tried jumping the chain a few teeth on the crank... but that's not just gonna work
For that I'd have to remove the crank pulley and the timing chain cover plate. I'd prefer not to.
Hope someone can help me out here
Thanks!
Jasper
10-09-2016, 07:32 AM
#2
The main thing is to have the cams aligned with the crank at TDC. If you did that you should be fine, otherwise adjust the cams until they line up with piston 1 at TDC. Get a straw or something you can mark and shove down the spark plug tube. Verify piston 1 is at TDC with the cam marks lined up and you shouldn't have any problems.
10-09-2016, 08:20 AM
#3
That's what I thought... If the idler gear, cams and crank are all in the correct position (TDC of piston 1,4), then what does it matter in what position the chain is? 
Just wanted to clarify because of the info from the service manual as posted above.
Just wanted to clarify because of the info from the service manual as posted above.
10-09-2016, 09:39 AM
#4
Interesting point in the manual, I never noticed that.
My chain is not aligned at that dot and it's still working, I'm guessing it was messed up at the same time as my cam gears where switched.
My chain is not aligned at that dot and it's still working, I'm guessing it was messed up at the same time as my cam gears where switched.
10-09-2016, 11:42 AM
#6
To add the white mark on the crank pulley is fool proof, as the damper is keyed to the crankshaft.
10-09-2016, 12:28 PM
#7
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10-09-2016, 03:13 PM
#8
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BTW, very clean engine. How many miles and what oil do you use?
that would drive me crazy to.