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Engine rattles on cold start up - 1998 Volvo V70

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Oil pump weak

Posted on May 02, 2010

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Posted on Jan 02, 2017

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1 Answer

Vdj76r turbo diesel v8 wagon. Why does it have an occasional engine rattle when cold?


A brief engine rattle occurs when starting the car because the oil has not reached all of the engine, do not apply accelerator when starting in the morning. On diesel engines, if the oil is not changed regularly, the oil gets thick and loses it's viscosity.

Aug 18, 2015 | Cars & Trucks

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Rattle when engine on hold


try looking at motor mounts.

Aug 02, 2012 | 2005 Ford Mondeo ST

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Rattle noice engine around the calelitic converter. rattle noice when starting car up when cold. poor gas mileage.


Sounds like you may have a exhaust loose or either the cat converter is stopping up. Some of these have baffles inside which will break loose and cause a rattling noise. When the engine is cold, start the vehicle and crawl under and hold the converter with your hand and even the exhaust to see if any pressure will stop the or alter the noise. Careful it don't take long for the exhaust to heat up. If these baffles are broke inside, it can cause the converter to become stopped up and rattle, this will also give an engine false info when it comes to the fuel and air ratio mixture. Not going to far into it, so i don't confuse you. Good Luck

Mar 04, 2011 | 2008 Subaru Impreza

1 Answer

My Audi A4 2009 makes a rattling noise on cold starts which resolves in less than 30 seconds. Dealer says its an air pump. This doesn't seem correct. The noise comes from the front of the care. Does not...


READ THIS (happy ending so far...):
audi a4 2L turbo quattro, manual transmission with 98,000 KM. Perfect conditions, no oil leaks whatsoever.

Left the car off for two weeks in very cold weather (-10C down to -25C). When I restarted, it started immediately but with heavy rattling noise due to camshaft adjuster not getting enough oil pressure. After 3 minutes of warming up (outside temp.: -12C) at very low rpm (below 2,000rpm), I start moving the car. Still hearing heavy rattle noise. As soon as I pass 2,000 rpm, I get a scary red warning, low oil pressure. Turn off the engine immediately. In 1 minute, I re-start the car and the engine lights check ok, so I drive in first gear super slow (1,200rpm) hearing the same rattling noise. After another minute, finally the noise all the sudden disappears and the car starts running just fine.

Called Audi dealer and they told me that in extreme weather conditions, I should warm the engine for 10-15 minutes if necessary before start moving.
Take away: luckily, I didn't screw up the engine since I was using it at extremely low rpm (easy to do with clutch and manual transmission) until the oil reached full pressure. I am pretty sure now that the problem was leaving the car off for such a long time in freezing weather. All the oil flows back to the bottom, and when I restarted it, the cold oil with high viscosity took a long time to reach all the parts of the engine, specially the camshaft adjusters that are actuated by using oil pressure. Next day, the car started at -9C perfectly without making any noise (as usual). Basically, the longer you leave your audi in cold weather, the longer you might hear the rattling noise until the oil reach full pressure inside the engine. My car took 6 minutes to fix it after couple of weeks in cold weather. This makes sense to me; in fact, in the past I only heard the rattling noise after leaving the car off for a couple of days in the winter.
So far, this has had an happy ending....

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Dec 19, 2010 | 2009 Audi A4

1 Answer

On a 1988 toyota pickup i have a valve rattle problem i think its running leen til its worm how long dose the start injectot stay on the valves are quite once its worm


no its not running lean,,,the velves will rattle when cold,,its the way they are,,,the cold start will only stay on for a fuw minuets till the engine temp censor tell it to shut off

Jun 27, 2010 | 1988 Toyota Pickup

2 Answers

I have a 2001 Ford ranger supercab that makes rattling noises. It has a 4.0L SOHC. It makes a very fast and loud metallic rattle wich softens anfter about a second or so when I first start it for the day....


4.0l's are notorious for valve rattle on cold start-up. There is really nothing you can do to make it go away short of completely replacing the valve train in the top end, and that isn't a permanent fix. It's is an top end oiling issue from the factory. Just don't race your engine on cold start-up until the rattle stops.

The rattle in the transmission sounds to me to be more of a loose dust shield/heat shield around the transmission or exhaust than a mechanical issue.

Oct 20, 2009 | 2000 Ford Ranger SuperCab

1 Answer

A rattling noise from the engine bay


Check the heat shields on the exhaust system. They get loose from the extreme heat fluctuations work loose and rattle. Especially the one between the engine and firewall where the 02 sensor screws in. It probably rattles less after warm up because heat causes expansion which makes it tighter. Hope this helps.

Apr 05, 2009 | 2003 Toyota Corolla

1 Answer

Noisy rattle in engine compartment of 2003 Impala on cold start.


Take a broom handle(with the broom removed) or long heavy dowel rod , start the engine when cold and place one end of handle to your ear and the other to different parts non-moving parts of the engine compartment,including the engine to narrow down  the location of the noise. 

Dec 22, 2008 | 2003 Chevrolet Impala

3 Answers

Engine noise at cold start-up.


Sounds like your oil pump inside the engine is not pumping oil fast enough when you start your vehicle its common problem for mitsubishi motors my car does the same thing.

good luck

Nov 04, 2008 | 2002 Mitsubishi Montero

2 Answers

Cold engine startup rattle


The problem might be fuel injectors...

Jun 22, 2008 | 2004 Chevrolet Monte Carlo

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