help... timing marks on 20v 2.4 cam belt... - Alfa Romeo Forum
You are currently unregistered, register for more features.    
 1Likes
  • 1 Post By kam325i
 
Thread Tools
(Post Link) post #1 of 14 Old 17-11-12 Thread Starter
Status: broke it!
Newbie
 
Join Date: Aug 2012
Location: United Kingdom
County: Northamptonshire
Posts: 7
Help help... timing marks on 20v 2.4 cam belt...

cambelt failure... and im trying to get it back together...

got a cambelt kit (conti) and the belt doesn't have the bloody timing marks on it. as the cam carrier is off i was kinda relying on these to get it timed. no markings to alighn to anywhere else apart from the 8:30 crank and 1:30 ish cam.

so don't suppose anyone has a marked one kicking about and fancys counting the teeth between them or sticking up a high res pic?

cheers!
jez.

ps. eurocarparts have 30% off if you type SERVICE30 as code at checkout... rockers less than £7 quid each hence having a pop at this myself!
jezbraker is offline  
Sponsored Links
Advertisement
 
bap
Status: -
AO Member
 
Join Date: Nov 2011
Location: United Kingdom
County: Lancashire
Posts: 121

Member car:

SPIDER

Excuse my ignorance... Do these engines require cam setting tools like the 1.9 jtd 16v?
bap is offline  
Status: -
AO Platinum Member
 
David C's Avatar
 
Join Date: Aug 2003
Location: London, England
Posts: 29,993
Quote:
Originally Posted by bap View Post
Excuse my ignorance... Do these engines require cam setting tools like the 1.9 jtd 16v?
Yes, there are locking bolts.
David C is offline  
(Post Link) post #4 of 14 Old 17-11-12 Thread Starter
Status: broke it!
Newbie
 
Join Date: Aug 2012
Location: United Kingdom
County: Northamptonshire
Posts: 7
yup. and locking tools are great if you have a cambelt already on it so they are set correct... as my crank spun at a few thousand k without one i need to align using the only marks i can and they are on the belt (unless anyone has a better way that i can do it!) crank is set a tdc (8:30ish) so wanna get the cam close before i bolt down the carrier. pita the belt ive got is marking free
jezbraker is offline  
Status: -
AO Platinum Member
 
David C's Avatar
 
Join Date: Aug 2003
Location: London, England
Posts: 29,993
Quote:
Originally Posted by jezbraker View Post
yup. and locking tools are great if you have a cambelt already on it so they are set correct...
No.
The CORRECT locking tools lock the cams in the CORRECT position.
It makes no difference what position they are in before, the tools set them correct, they don't just keep them the same as they were before, after all you don't know they were correct before...
David C is offline  
(Post Link) post #6 of 14 Old 17-11-12 Thread Starter
Status: broke it!
Newbie
 
Join Date: Aug 2012
Location: United Kingdom
County: Northamptonshire
Posts: 7
cool - so sounds like the locking tools would be handy then - do they lock the crank in the correct position as well?

either way i dont have them and it seems that many belts have two marks which align to the marks on the cam and crank - if the belts the right way round and the marks on belt align then the timing will be correct (providing the cam near 02:00ish). so though was if i know how many ribs to put the marks on the belt i can lock up the cams closeish, bolt down and then tension. cant see how the timing can be off if the belt marks are aligned.

but as my belt is markless im a little blind at the mo
jezbraker is offline  
Status: I am also Keith......
AO Member
 
kam325i's Avatar
 
Join Date: Sep 2012
Location: United Kingdom
County: Shropshire
Posts: 565
I have never heard of "Timing marks" on cam belts.....EVER....
This could make the manufacturere liable for new engines if the marks were put on the belt wrong....

Timing on engines has always been a combination of marks on the crank and block to set TDC, then either marks on the cam pullys and head OR cam locking tools.....
kam325i is offline  
(Post Link) post #8 of 14 Old 17-11-12 Thread Starter
Status: broke it!
Newbie
 
Join Date: Aug 2012
Location: United Kingdom
County: Northamptonshire
Posts: 7
well if it doesnt i suppose im screwed and inneed of the locking tools David mentions - if they lock the crank as well of course!

https://www.alfaowner.com/Forum/alfa-...-cam-belt.html
Cam Belt Change Guide on Alfa Diesel Engines

seems quite a sensible idea. although some markings on the cam cover and block would be pretty damn useful as well!!!
jezbraker is offline  
kevjtd
Status: - Update
Guest
 
Posts: n/a
Quote:
Originally Posted by kam325i View Post
I have never heard of "Timing marks" on cam belts.....EVER....
This could make the manufacturere liable for new engines if the marks were put on the belt wrong....

Timing on engines has always been a combination of marks on the crank and block to set TDC, then either marks on the cam pullys and head OR cam locking tools.....
they are on the belts on jtds'
 
(Post Link) post #10 of 14 Old 17-11-12 Thread Starter
Status: broke it!
Newbie
 
Join Date: Aug 2012
Location: United Kingdom
County: Northamptonshire
Posts: 7
you know if your 20v had um as well Kev? ive seen the marks on pix on web but you never know if they are the proper part or just a generic piccy!
jezbraker is offline  
Status: I am also Keith......
AO Member
 
kam325i's Avatar
 
Join Date: Sep 2012
Location: United Kingdom
County: Shropshire
Posts: 565
Quote:
Originally Posted by kevjtd View Post
they are on the belts on jtds'
Fook that.......

I would never trust that......
MiLadyZN likes this.
kam325i is offline  
(Post Link) post #12 of 14 Old 17-11-12 Thread Starter
Status: broke it!
Newbie
 
Join Date: Aug 2012
Location: United Kingdom
County: Northamptonshire
Posts: 7
64 looks like the magic number.
http://www.alfaworkshop.co.uk/images...2286-1-800.jpg
if you dont trust the manufacturers of timing belts then how about trusting a couple of home made marks based on a low res pic found on tinternet... lol think i might have to resort to buying anther one.
jezbraker is offline  
kevjtd
Status: - Update
Guest
 
Posts: n/a
Quote:
Originally Posted by kam325i View Post
Fook that.......

I would never trust that......
no need at all to get down and jiggy with it

the marks are on the belt, but i use the timing marks on the casings....which also line up with the marks on the belt

done the 8V, 10V & 16V but not the 20V (not the diesel 20V anyway) and not used any cam-locks etc. the marks are there to do the job without anything like you need on a ts.

and no, i don't just tipex the old positions
 
Status: -
AO Member
 
gammakeith's Avatar
 
Join Date: Nov 2010
Location: United Kingdom
County: Nottinghamshire
Posts: 822

Member car:

156 JTD 2.4 20V

As Kev says. I have a set of timing tools for my 20V and they make the job easier but its certainly acceptable to perform the procedure using the alignment marks on the crank and cam (the fuel pump is not timed). The 20V is the same procedure as the other diesels as the second cam is driven off the first. The diesels have the cam pulley keyed to the cam unlike the petrol engines which need the locking tools.

Keith
gammakeith is offline  
Reply

Go Back   Alfa Romeo Forum > Supported Alfa Romeo Models > Technical & Vehicle Assistance > Alfa 147, 156 & GT

Tags
20v , belt , cam , marks , timing

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

 
For the best viewing experience please update your browser to Google Chrome