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        General >> Problems >> Rattle on start up
        
(Message started by: robrs2 on Aug 7^th, 2009, 10:07pm)

Title: Rattle on start up
Post by robrs2 on Aug 7^th, 2009, 10:07pm

Started my sierra 24v bob to hear one hell of a rattle for a few seconds. Thought it may be the chain tensioner so did a search on here.
But is it fixable and what goes wrong.
Is it the hydraulic chain tensioner failing or just down to poor oil pressure as it could do with an oil and filter change.

Also i have hear a loud click/bang as the engine warms up. I've never been able to pin down where or what that may be.

Rob

Title: Re: Rattle on start up
Post by Highlander on Aug 7^th, 2009, 10:11pm

Sounds like the chain guides may be broken as a result of the tensioner failing.

Oilways get blocked and the tensioner doesnt tension the chain, it slaps around and breaks the guides or can even jump on the cogs.

You will probably find them lying in the bottom of the sump beside the oil pick up! :o

Can be disastrous if they block it but doesnt happen very often.

Only way to really check whats happened is to get in and have a look.

Some engines seem to run for long enough with the chain rattle but it a sign something is wrong.

Unless you've spent money on that engine the quickest cheapest solution is another engine :-/

Title: Re: Rattle on start up
Post by - Mike - on Aug 7^th, 2009, 10:40pm

on 08/07/09 at 22:11:53, Highlander wrote:

Oilways get blocked and the tensioner doesnt tension the chain, it slaps around and breaks the guides or can even jump on the cogs.

Can the tensioners and guides be changed in situ ???

Title: Re: Rattle on start up
Post by gozz on Aug 7^th, 2009, 11:56pm

Rob.
The cracking sound as the Cossie warms up is obviously something expanding,mine does exactly that with no detrimental affect.You can change all the timing gear in situ if you have plenty of time and patience ! If you were a mechanic earning you living doing motor repairs,I doubt that the Cossie owner would be prepared to pay what you would have to charge him 8)
GOZZ.

Title: Re: Rattle on start up
Post by Highlander on Aug 8^th, 2009, 10:47am

http://www.fordscorpio.co.uk/timingchain29.htm

Title: Re: Rattle on start up
Post by robrs2 on Aug 9^th, 2009, 12:00pm

Was thinking of taking the BOB out for a Zetec. Looks like its an engine change then.

Title: Re: Rattle on start up
Post by amigafan2003 on Aug 9^th, 2009, 7:54pm

They can go on for ages with a rattle - I wouldn't be swapping it out just Zetec

Title: Re: Rattle on start up
Post by Highlander on Aug 9^th, 2009, 9:29pm

they can but they can also snap with a rattle...
usually late at night when its dark raining and you're in a hurry :)

Title: Re: Rattle on start up
Post by amigafan2003 on Aug 9^th, 2009, 10:03pm

They can just as likely snap without a rattle.

That's what and AA/RAC card is for.

Title: Re: Rattle on start up
Post by robrs2 on Aug 9^th, 2009, 11:44pm

Turned it over until the oil pressure light went out, then let it start. No rattle.
Anyway the engine is coming out to go into a saff i have, just hope its fixable

Title: Re: Rattle on start up
Post by tlundkvi on Aug 10^th, 2009, 6:47am

on 08/09/09 at 22:03:39, amigafan2003 wrote:

They can just as likely snap without a rattle.

That's what and AA/RAC card is for.

Or what I have: Car towing service from the insurance. If left on the road, it covers towing expenses + even hotel for up to 5 days depending on how far home it is (otherwise it covers transport home and back to the serviced car etc.). Only "stupid" thing with it is it doesn't cover repair costs. Not sure if this is a standard insurance in UK, quite common in Finland.

Title: Re: Rattle on start up
Post by amigafan2003 on Aug 11^th, 2009, 1:20pm

Quote:

Turned it over until the oil pressure light went out, then let it start. No rattle.

Oil in the tensioners is draining overnight then - takes a couple of seconds for the pressure in them to build back up, hence the rattle while the chain whizzes round untensioned.

You can take the tensioners off and give them a good clean - sometimes helps. Only £1.80 for each of the gaskets as well.

Quote:

Only "stupid" thing with it is it doesn't cover repair costs. Not sure if this is a standard insurance in UK, quite common in Finland.

AA/RAC etc don't cover repair costs either - hey are simply "recovery" policies - i.e. they'll try an basic "get you home repair" and if that doesn't work then they'll recover your car/get you home/get you to where your going depending on your level of cover.

Title: Re: Rattle on start up
Post by wojtekor on Aug 11^th, 2009, 1:27pm

AA has/had an extra plan for a few quid they cover up to 500£ of repair costs...

Title: Re: Rattle on start up
Post by robrs2 on Aug 12^th, 2009, 1:01am

I'll take them off for a clean

Title: Re: Rattle on start up
Post by a900one on Aug 15^th, 2009, 10:04pm

I will be interested in the result as mine rattles a bit on startup. I think the problem one is the one under the alternator, I have thought of replacing it.