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Author Topic: Cold Start Rattle  (Read 1686 times)

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puffa

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Cold Start Rattle
« on: 19 September 2008, 09:30:28 »

Ok here goes,, i have a problem,, since returning from my hols in Yorkshire every the car starts with its normal roar every morning, however as soon as you touch the throttle there is a rattle coming from the engine bay,, if you leave the car to idle for a minute or two she roars in the normal fashion,, it only does it the first time she is started and is fine all day long its just the first start of the day I have changed Oil to GM 10w40, and Oil filter (GM part) last weekend but rattle is still there,, it would seem that the oil is not getting up top quick enough, can anyone guide me as to where to look first,, is it a feeder pipe that may be blocked or something else...

I am sure the rattle is not healthy and need to sort it asap

Steve
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cem_devecioglu

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Re: Cold Start Rattle
« Reply #1 on: 19 September 2008, 09:33:33 »

Quote
Ok here goes,, i have a problem,, since returning from my hols in Yorkshire every the car starts with its normal roar every morning, however as soon as you touch the throttle there is a rattle coming from the engine bay,, if you leave the car to idle for a minute or two she roars in the normal fashion,, it only does it the first time she is started and is fine all day long its just the first start of the day I have changed Oil to GM 10w40, and Oil filter (GM part) last weekend but rattle is still there,, it would seem that the oil is not getting up top quick enough, can anyone guide me as to where to look first,, is it a feeder pipe that may be blocked or something else...

I am sure the rattle is not healthy and need to sort it asap

Steve

I think if there is a problem with the oil pump oil lamp must be on..

whats the mileage ?
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puffa

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Re: Cold Start Rattle
« Reply #2 on: 19 September 2008, 09:35:02 »

96k on the clock no warning lights are on though ?
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cem_devecioglu

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Re: Cold Start Rattle
« Reply #3 on: 19 September 2008, 09:40:00 »

if there are no warning lights my estimation is about classical problems..

Air leak is very common..

Oxidation in sockets also can be a problem..

And Did you changed normal service items..?
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cem_devecioglu

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Re: Cold Start Rattle
« Reply #4 on: 19 September 2008, 09:42:29 »

And with rattle, you mean engine not working properly like shaking ?

if you are talking about weird noises on startup  ,an old SAI pump also causes  that..
« Last Edit: 19 September 2008, 09:44:00 by cem_devecioglu »
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puffa

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Re: Cold Start Rattle
« Reply #5 on: 19 September 2008, 09:48:17 »

ok changed oil & oil filter,, plugs,,, air filter,, what have i missed ???? fuel filter done last service

steve
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Jimbob

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Re: Cold Start Rattle
« Reply #6 on: 19 September 2008, 09:52:39 »

deffo not exhaust heat shields? roughly under the seats are heatshields that have a tendancy to rattle.  Big jubillee clip tightened round them shuts em up.
not really an engine bay noise though  :-/

If its more of a ticking noise, could be exhaust manifold gasket blowing?

cem_devecioglu

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Re: Cold Start Rattle
« Reply #7 on: 19 September 2008, 09:52:51 »

Have you ever changed exhaust manifold gasket ?
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cem_devecioglu

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Re: Cold Start Rattle
« Reply #8 on: 19 September 2008, 09:53:42 »

Quote
deffo not exhaust heat shields? roughly under the seats are heatshields that have a tendancy to rattle.  Big jubillee clip tightened round them shuts em up.
not really an engine bay noise though  :-/

If its more of a ticking noise, could be exhaust manifold gasket blowing?

Here's  a saying in my language  "long live more than me"  :y
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puffa

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Re: Cold Start Rattle
« Reply #9 on: 19 September 2008, 09:55:31 »

never changed exhaust gaskets,, however rattle goes within minutes and cannot be heard till the following stone cold start up,, sound high up too rather than down the bottom end ?
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cem_devecioglu

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Re: Cold Start Rattle
« Reply #10 on: 19 September 2008, 09:57:20 »

Quote
never changed exhaust gaskets,, however rattle goes within minutes and cannot be heard till the following stone cold start up,, sound high up too rather than down the bottom end ?

symptoms of exhaust manifold gasket  :-/
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The Red Baron

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Re: Cold Start Rattle
« Reply #11 on: 19 September 2008, 10:19:06 »

does sound like the gaskets, my 2.5 does the same when cold, can hardly hear it when warmed up.
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puffa

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Re: Cold Start Rattle
« Reply #12 on: 19 September 2008, 10:21:54 »

would the gaskets sound like an unhealthy rattle or more of a ticking noise though,, this really does sound mechanical ???
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Re: Cold Start Rattle
« Reply #13 on: 19 September 2008, 10:26:14 »

"Tappets" :question - had this on mine rattled for 30 secs then went.  Cured after oil changes.
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jimmas

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Re: Cold Start Rattle
« Reply #14 on: 19 September 2008, 11:01:39 »

sounds like a rattle from the hydraulic lifters, maybe a sticky lifter, you can get some additive that you put in engine that can help free of lifter if sticking, have you got the right viscocity oil in engine, this can contribute to the problem if wrong.
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