-
Hi Guest!
You can help ensure that British Car Forum (BCF) continues to provide a great place to engage in the British car hobby! If you find BCF a beneficial community, please consider supporting our efforts with a subscription.
There are some perks with a member upgrade!**Upgrade Now**
(PS: Subscribers don't see this gawd-aweful banner
Hey - did you know if you click on the title of a thread it will take you to the first unread post since you last visited that thread?
but were afraid to ask: 
STOP!! Never post your email address in open forums. Bots can "harvest" your email! If you must share your email use a Private Message or use the 
smilie in place of the real @
Pretty Please - add it to our Events forum(s) and add to the calendar! >> 
timing sprockets
- Thread starter wdp
- Start date
Share this page
Hello WDP.
I can't comment on these parts (and I don't know which engine you are working on), but it is easy to get confused with timing the cam due to the cam rotating at half crank rotation.
Set your crank at TDC on one and four (or six) and set the cam with the lobes of four (or six) at a Vee configuration. something like exhaust at ten to and the inlet at ten past.
Put the sprockets in the chain and see if the marks line up. Obviously you need to eyeball them to line with the keyways and often you need to make a one tooth adjustment. It should all go together that way?
Alec
I can't comment on these parts (and I don't know which engine you are working on), but it is easy to get confused with timing the cam due to the cam rotating at half crank rotation.
Set your crank at TDC on one and four (or six) and set the cam with the lobes of four (or six) at a Vee configuration. something like exhaust at ten to and the inlet at ten past.
Put the sprockets in the chain and see if the marks line up. Obviously you need to eyeball them to line with the keyways and often you need to make a one tooth adjustment. It should all go together that way?
Alec
I'm working on a B motor and no matter how many times we tried the only way we could get it timed correctly with #1 tdc, cam and crank key ways clocked correctly is with the cam sprocket timing mark 180 out. I was questioning the quality of the County brand, made in India parts.
Both the Bentley and Haynes manuals show the timing marks side by side.
Both the Bentley and Haynes manuals show the timing marks side by side.
jlaird
Great Pumpkin
Offline
Would I be out of line to say the key ways have no bearing.
TDC on crank #1 all the way up.
Dot on crank gear should point to the cam.
Make the cam dot point to the crank dot with the chain on.
Make darn sure the are in line with the center line of the crank and cam.
All should be good, forget the keyways.
TDC on crank #1 all the way up.
Dot on crank gear should point to the cam.
Make the cam dot point to the crank dot with the chain on.
Make darn sure the are in line with the center line of the crank and cam.
All should be good, forget the keyways.
Hello WDP,
yes, the marks should be inside but if the crank and cam are aligned correctly, forget the marks.
If you have the original wheels, check the marks relative to the keyways and compare to the new items. If old and new do match you are doing something wrong, otherwise re-mark your new sprockets, if you like.
Alec
yes, the marks should be inside but if the crank and cam are aligned correctly, forget the marks.
If you have the original wheels, check the marks relative to the keyways and compare to the new items. If old and new do match you are doing something wrong, otherwise re-mark your new sprockets, if you like.
Alec