Question about 2005 Ford Mondeo ST

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Rattle when engine on hold

When the engine is cold no rattle, when warm hard accelerate no rattle, engine off load no ratlle back on the thottle rattle continueous, cannot pin point top or bottom of the engine the rattle is coming from

Posted by Ian Keenan on


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  • 21 Answers

Try looking at motor mounts.

Posted on Aug 02, 2012

  • Ian Keenan Aug 07, 2012

    Thanks Glenn the rattle is in the engine



5 Related Answers


  • 532 Answers

SOURCE: rattling sound inside engine on acceleration

possibly the bearings in the water pump,but that should have been replaced when the timing belt was done,because of the work involved

Posted on May 16, 2009



  • 553 Answers

SOURCE: rattling noise when cold start. noise dissapear

You problem is most likely just lifter noise. This is common with a lot of Ford engines with self adjusting lifters. Although lifter noise is bothersome it doesn't pose a serious problem. Unless your engine starts to miss or your gas mileage drops way off lifter noise is just an annoying problem.
I would recommend that you add some Sea Foam Engine Treatment($6-$8) to your oil. This is not an oil treatment it's more of an engine cleaner. If this works you'll need to add it every 2nd or 3rd oil change.
If this doesn't take care of the problem then depending on your engine you may have adjustable rockers that would allow you to remedy the problem. If not, your options are limited to living with it or replacing the lifters and possibly other valve train parts.

Posted on Jul 20, 2010


  • 16 Answers

SOURCE: cranks fine but runs rough and dies.

you need a new choke

Posted on Dec 17, 2008


Clint Smock

  • 4669 Answers

SOURCE: 86 Ford F350 Cold Start Problem

Does it have a carburetor or is it fuel injected? In 1986 it could be either way. It sounds like a carburetor with a choke problem.

Posted on Mar 24, 2009

jimmy nutron

jimmy nutron

  • 132 Answers

SOURCE: no idle when cold

thats a problem with the eletric choke make shure it is pluged in all the way if it it you will need to replace it.

Posted on Jun 04, 2009

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This might be as simple as an oil filter draining down and delaying oil pressure during cold starts.Recomend usage of Nissan factory filters as theirs has a built in check valve to minimize bleed down.Also recomend oil no thicker than 5W30. You may be also faced with a hydralic lash adjuster bleeding down causing momentarily loose clearance in the valve rocker assembly. This particular ratlle would be half of crankshaft speed which would indicate upper end rattle.

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