RE: Timing chains - tendency to break

["Santamaria, Joseph (Joseph)" <jsantamaria@domain.elided>]

Peter, the only reason I questioned the Rimmer provided chains was because
of a comment by  Dave Biggs, which I have attached below.

As he suggests soft chains stretch and hard chains may break - there is
obviously some sense here. I just wanted to know how prevelent the problem
of breaking is - the problem of stretching is well known or at least often
spoken about.


P.S Dave - hope you don't mind me re-transmitting your thought on the chains



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Extract from Comment by Dave Biggs 10 th June 99 on the list

Each Stag engine has 2 timing chains one 104 links and one 106 links -
so you need one of each !

The German timing chains are more resistant to stretching but some may
say that they can break without warning so you pays your money and takes
your choice !

Regards,

Dave.

-- 
	Dave Biggs                       
	Senior Design Engineer 	
	Fujitsu Telecommunications Europe Ltd, 
	Birmingham Business Park,Solihull Parkway, Birmingham, B37 7YU.
	mailto:D.Biggs@domain.elided  tel: 0121 717 6094  efax: 0121 717 6014

END OF EXTRACT FROM Dave Biggs
____________________________________________________________________________
_____________________


Regards,
Joe Santamaria
* Lucent Technologies Australia Pty Ltd
Professional Services
*Tel:   +61 2 93529287
*Fax:  +61 2 93529287
* mailto:jsantamaria@domain.elided

> ----------
> From: 	PGAHOWELLS@domain.elided[SMTP:PGAHOWELLS@domain.elided]
> Sent: 	Monday, 14 June 1999 7:05
> To: 	Santamaria, Joseph (Joseph); stag@domain.elided
> Subject: 	Re: Timing chains - tendency to break
> 
> I think it is highly unlikely Rimmer would be selling them (German chains)
> if 
> they didn't work.
> I think that provided you keep from overheating and change the oil each
> 3000 
> they will last for many miles.
> Why do they stretch or break anyway.
> My own theory is that something must happen to impede their smooth
> running.
> Like a camshaft that lost its free turning ability due to slight warping
> of 
> the head, or a siezed water pump, caused through not changing the oil or
> for 
> this same reason they cut into the rubber slippers in the adjusters, get 
> sloppy and jump the sprockets or break when the load comes on.
> 
> One obviously changes regular chains when the adjusters are fully out
> (Peep 
> down the oil filler cap hole with a small torch).
> 
> If german chains do not stretch, then adjusters don't come out, so I don't
> 
> know when you change them. 
> Hopefully someone will clue me up on this.
> Peter H
>  
>  
>