Installing Timing Chain
05-02-2019 | 06:44 AM
#1
Thread Starter
New Member
Joined: 01-20-2018
Posts: 15
From: MA
Installing Timing Chain
Hello,
I'm installing the timing chain on my Ecotech 2.2. The sprockets and marks on the chain all line up. When I rotate the engine a couple of times the marks never line up again.
What I've read says the marked chain links should line up with the sprocket every two revolutions. Any suggestions as to what I'm doing wrong?
I'm installing the timing chain on my Ecotech 2.2. The sprockets and marks on the chain all line up. When I rotate the engine a couple of times the marks never line up again.
What I've read says the marked chain links should line up with the sprocket every two revolutions. Any suggestions as to what I'm doing wrong?
05-02-2019 | 06:55 AM
#2
Platinum Member
Joined: 12-06-2009
Posts: 11,431
From: Alabama
Hello,
I'm installing the timing chain on my Ecotech 2.2. The sprockets and marks on the chain all line up. When I rotate the engine a couple of times the marks never line up again.
What I've read says the marked chain links should line up with the sprocket every two revolutions. Any suggestions as to what I'm doing wrong?
I'm installing the timing chain on my Ecotech 2.2. The sprockets and marks on the chain all line up. When I rotate the engine a couple of times the marks never line up again.
What I've read says the marked chain links should line up with the sprocket every two revolutions. Any suggestions as to what I'm doing wrong?
They won't line up again until many revolutions later. Can't remember the exact amount, but it's a bunch. Just the way the design is based on sprocket teeth and number of chain links. These aren't old V8's with a simple 2 gears and short chain which will realign after 2 rotations.
FYI. Don't rotate the engine backwards while checking the chain marks. The tensioners aren't designed to work backwards and could easily allow the chain to jump a tooth or 2.
05-02-2019 | 07:50 AM
#3
Thread Starter
New Member
Joined: 01-20-2018
Posts: 15
From: MA
You read something wrong.
They won't line up again until many revolutions later. Can't remember the exact amount, but it's a bunch. Just the way the design is based on sprocket teeth and number of chain links. These aren't old V8's with a simple 2 gears and short chain which will realign after 2 rotations.
FYI. Don't rotate the engine backwards while checking the chain marks. The tensioners aren't designed to work backwards and could easily allow the chain to jump a tooth or 2.
They won't line up again until many revolutions later. Can't remember the exact amount, but it's a bunch. Just the way the design is based on sprocket teeth and number of chain links. These aren't old V8's with a simple 2 gears and short chain which will realign after 2 rotations.
FYI. Don't rotate the engine backwards while checking the chain marks. The tensioners aren't designed to work backwards and could easily allow the chain to jump a tooth or 2.
05-02-2019 | 08:08 AM
#4
Platinum Member
Joined: 12-06-2009
Posts: 11,431
From: Alabama
Nope. Number of teeth on the sprockets(cam and crank) versus number of links in the chain.
Couple of years ago we had a discussion about this in this forum. When my memory says a bunch of revolutions, I seem to recall it was over a hundred until they all lined back up.
Remember that you're not timing the chain, you're timing the sprockets (the cams to crank relation) The cams and crank return to the same "timed" spot after 2 rotations.
The marks on the chain are just there for the initial install.
Couple of years ago we had a discussion about this in this forum. When my memory says a bunch of revolutions, I seem to recall it was over a hundred until they all lined back up.
Remember that you're not timing the chain, you're timing the sprockets (the cams to crank relation) The cams and crank return to the same "timed" spot after 2 rotations.
The marks on the chain are just there for the initial install.
05-02-2019 | 08:26 AM
#5
Thread Starter
New Member
Joined: 01-20-2018
Posts: 15
From: MA
I found this formula...........# of turns equals the lowest common multiplier of all sprockets divided by the number of teeth of the sprocket being turned.
If I counted correctly, each cam sprocket has 46 teeth and the balance shaft sprocket has 42.
If this formula is right then it's 23 turns.
I'll find out when I wake up.
Thanks again.
If I counted correctly, each cam sprocket has 46 teeth and the balance shaft sprocket has 42.
If this formula is right then it's 23 turns.
I'll find out when I wake up.
Thanks again.
05-02-2019 | 04:09 PM
#7
Thread Starter
New Member
Joined: 01-20-2018
Posts: 15
From: MA
I rotated the crank a few more times. The intake sprocket and the exhaust sprocket lined up with the crank every two revolutions.
I'll let you know when I get a sticker.
Once again. THANK YOU very much.
Time to go to work...
I'll let you know when I get a sticker.
Once again. THANK YOU very much.
Time to go to work...
05-02-2019 | 05:53 PM
#8
Platinum Member
Joined: 12-06-2009
Posts: 11,431
From: Alabama
Well. If I did my math correct, it will take 74 revolutions (at the crank) until all the timing marks and corresponding links on the chain all line back up.
05-02-2019 | 08:56 PM
#9
Thread Starter
New Member
Joined: 01-20-2018
Posts: 15
From: MA
Because when I get off of night shift I'm demented. I gave up on that idea when I woke up.
05-02-2019 | 09:47 PM
#10
Moderator
Joined: 01-23-2009
Posts: 25,345
From: Fredericksburg,VA
Thread closed for wasting air.
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