View Single Post
  #4  
Old 02-22-2008, 09:58 PM
Arthur Dalton Arthur Dalton is offline
Registered User
 
Join Date: Aug 1999
Location: Florida / N.H.
Posts: 8,804
'90 300E 3.0L engine timing chain tension

You have to push the pin all the way through and out the the chain side and then re-insert it from the outside...they have a lock/ratchet feature that only allows the pin to lengthen, so they can not retract when the engine is off.. if you do not reset this , the tensioner will still be at the original length and it will be too tight..this can snap the cam right in half..

That post explains it a little better...or do a search ..there are lots of info.
The reason they went to that type is the old ones were hydraulic and they would loose tension when thy sat, resulting in timing chain rattle at start-up and often even jumping timing at start. This ratchet system has eliminated that problem, but many do not know enough to reset it and they wind up breaking expensive valve train stuff...
__________________
A Dalton
Reply With Quote