broken timing chain - SaabCentral Forums
* site search:  
Home Saab Pictures Saab Classifieds Saab Dealer Listings Saab Forum Saab Forum

Go Back   SaabCentral Forums > Saab 9000 > Saab 9000 Workshop
Saab 9000 Workshop Saab 9000 (1985-1998) Technical Forum

SaabCentral.com is the premier Saab Forum on the internet. Registered Users do not see the above ads.
Reply
 
Thread Tools Display Modes
  #1  
Old 17th April 2005
domperignon domperignon is offline
Junior Member
 
Join Date: Dec 2003                                                
Location: north carolina USA
Posts: 6
Default broken timing chain

The timing chain on my 9000 cd turbo broke, while I was driving, (of course) but thankfully not at high speed or rpm. What I am trying to find out is if saab has built in enough clearance so the valves don't slap the pistons. Hubby can do the timing chain itself, but do we need to be concerned about piston damage? Any help is appreciated. Thanks, dom
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 18th April 2005
boxman's Avatar
boxman boxman is offline
Saab on the Brain!
 
Join Date: Nov 2003                                                
Location: south west_UK
My Saabs: 9-3 SS Aero TTiD + 9-3 SV Aero
Posts: 7,970
Default

i cant say for sure but what i can say is the valves do pertrude past the head to block mating face when open so its possible that the valves and pistons have met, you wont know until the engine is dismantled i'm afraid, unless any one else out there knows for sure
Reply With Quote Quick reply to this message
  #3  
Old 18th April 2005
klarking1075 klarking1075 is offline
Saab Lunatic
 
Join Date: Feb 2005                                                
Location: Midlothian, Scotland
My Saabs: MY98 9000 CSE B234R
Posts: 1,220
Default

The bad news, is that there is no gurantee at all that you will get away without damage on an 'intrusion' engine (i.e. the valves intrude into the piston stroke). I had the timing belt tensioner go on an 1800 Mondeo (those are intrusion engines), and all 16 valves were bent.

So don't count on being lucky - when the mondeo failed, it was sitting just above idle (1,100 rpm).

If you want to snap the timing belt on a car - certain of the Mazda MX5 engines are non-intrusion (and they are in the minority) - so snap the belt at whatever rpm you want and all you need to do is put the new belt on. Wish everyone did it that way. I guess though, they do intrusion so that if it snaps it costs a fortune to fix. Bah humbug. Back to being cynical again.

Cheers


Kenneth
Reply With Quote Quick reply to this message
  #4  
Old 19th April 2005
Basre Basre is offline
Banned
 
Join Date: Nov 2004                                                
Location: canada
Posts: 637
Default

Unfortunately .. the Saab IS an 'interference' engine.. Valves do hit the Pistons.
Even on the starter.. the Valves.. WILL.. be bent and will require replacement.. sometimes the 'bend' damages the guides as well.
With a lot of luck you 'Might' not have to replace the pistons.
Strange that yrs 'snapped' they rarely do this, usually jumping a tooth on an appalingly worn chain (same result tho :-)..
these are Tough Parts onna Saab.
Reply With Quote Quick reply to this message
  #5  
Old 19th April 2005
domperignon domperignon is offline
Junior Member
 
Join Date: Dec 2003                                                
Location: north carolina USA
Posts: 6
Default

I was surprised too! Didn't worry a lot because of the chain, not a belt. Upon examination, the belt did not show undue wear, don't know what happened, but sure wish it hadn't. Love my car, love the "get up and git" and the luxury it affords. Hubby swears he's gonna make a weinie roast out of it, but over my dead body! lol If it jumped a cog, it did it at the same time, because I never had trouble with starting, running consistantly, and, of course, acceleration. (my personal favorite!)

Last edited by domperignon; 19th April 2005 at 09:19 PM.
Reply With Quote Quick reply to this message
  #6  
Old 20th April 2005
klarking1075 klarking1075 is offline
Saab Lunatic
 
Join Date: Feb 2005                                                
Location: Midlothian, Scotland
My Saabs: MY98 9000 CSE B234R
Posts: 1,220
Default

Sorry, I must be old fashioned - I always knew them as 'intrusion' rather than 'interference'. I guess as long as we all know what I'm talking about.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Bookmarks

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the SaabCentral Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

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

Forum Jump


All times are GMT -4. The time now is 08:43 PM.



Powered by vBulletin® Copyright ©2000 - 2014, vBulletin Solutions, Inc.

top of page | sitemap | email us



copyright © 2003 - 2011 saabcentral.com, All rights reserved http://www.whiter.co.uk - valid xhtml - valid css
SaabCentral is an independently run website and is not affiliated in any way to Saab Automobile AB.


Garage Plus vBulletin Plugins by Drive Thru Online, Inc.