Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: scottydog on 17 February 2009, 19:58:28

Title: how to position camshaft sprockets on a 2.0 dohc
Post by: scottydog on 17 February 2009, 19:58:28

hi everyone i have a 2 litre omega with dohc and i am trying to fit a new timing belt put dont know which marks to line up with what on the camshaft sprockets. if you look at the 2 of them the left one only has one marking on it but the right one has 2 one marking says intake and the other says exhaust which marking goes to the top please help. pics would be even better thanks.                                                  ps i dont have a clue what i am doing

Title: Re: how to position camshaft sprockets on a 2.0 dohc
Post by: Loch View on 17 February 2009, 20:02:16

Buy the DVD from the shop ^^^up there^^^  :y

Title: Re: how to position camshaft sprockets on a 2.0 dohc
Post by: Welung666 on 17 February 2009, 20:14:30

There is a mark on each cam wheel that needs to line up with the first bearing cap at the top. Crank has a similar mark that needs lining up with the mark at the very bottom (6 o'clock position).

Title: Re: how to position camshaft sprockets on a 2.0 dohc
Post by: scottydog on 17 February 2009, 20:16:50

yeah but the right cam has 2 marking dont know which one to use. ?

Title: Re: how to position camshaft sprockets on a 2.0 dohc
Post by: Welung666 on 17 February 2009, 20:21:37

Dependant on it being the inlet or exhaust cam :y

Title: Re: how to position camshaft sprockets on a 2.0 dohc
Post by: scottydog on 17 February 2009, 20:42:40

do you know how to tell

Title: Re: how to position camshaft sprockets on a 2.0 dohc
Post by: Welung666 on 17 February 2009, 20:58:46

The sprocket is normally stamped in or ex

Title: Re: how to position camshaft sprockets on a 2.0 dohc
Post by: scottydog on 17 February 2009, 21:03:20

ok cheers will have a look

Title: Re: how to position camshaft sprockets on a 2.0 dohc
Post by: Welung666 on 17 February 2009, 21:31:47

Do you have a haynes? There's quite a good drawing in there.

Title: Re: how to position camshaft sprockets on a 2.0 dohc
Post by: scottydog on 17 February 2009, 21:58:30

yeah just got one but cant see where it tells me about which mark should go where

Title: Re: how to position camshaft sprockets on a 2.0 dohc
Post by: willyboy on 18 February 2009, 00:11:02

I do recall that one of the marks is miles out when the one on its own is lined up so obviously I used the one that did actually line up then stuck the locking key in  lined up with marks at the top..I imagined that the other mark was cast in it for use as a inlet cam shaft gear also when manufactured, as it serves no purpose
Its shown clearly on page 2B*4..3.5 at top of page in Haynes book it even shows the crankshaft pulley at TDC once those 3 all line up thats when you need to lock it with a key or wedge or something !! then undo tension pulleys & Slide belt off :y

Title: Re: how to position camshaft sprockets on a 2.0 dohc
Post by: scottydog on 18 February 2009, 14:25:15

the belt had snapped and the sprockets are not in line anymore so just need to line them up for the new belt to go on. going to give it a go at the weekend cheers for the advice.

Title: Re: how to position camshaft sprockets on a 2.0 dohc
Post by: Marks DTM Calib on 18 February 2009, 15:09:26

Quote

the belt had snapped and the sprockets are not in line anymore so just need to line them up for the new belt to go on. going to give it a go at the weekend cheers for the advice.

I wouldn't bother, if the belts snapped the valves will be bent.

For info, the exhaust cam is on the right by the exhaust manifold (hence the Exh mark) and the inlet is on the left (obvious really) when viewed from the front