Q: Rattling sound in 2004 F-150 Lariat when starting the engine on cold weather

asked by on April 11, 2016

I've got 2004 F-150 Lariat with a 5.4 engine. When I first turn on the engine when it's cold, it sounds like a diesel engine for three seconds--like a rattling sound that quiets down. What could it be? It runs fine after the initial rumble.

Car is making a noise Inspection $79.99 - $99.99 Get a Quote

Unfortunately for you, that is almost always a testing slap. It means that the bearings are worn and that the pistons around are slapping back and forth. If it makes that much noise, have a mechanic listen to and diagnose the noise. Bring it to a mechanic and let it sit in his garage over night and the next day let him start listening. If that’s the case, either decide to get another vehicle or put another engine in, because once they start rattling like that, there’s serious damage inside them. I don’t advise fixing them piece by piece and putting new bearings because you would have to do a crank over. And when you do the crank over, you have to pull the engine out and strip it down.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing


Experienced Mechanic?

Earn up to $70/hr

What others are asking

how do i know which thermostat to replace in 2013 chrysler 200

The only way to test a thermostat is off the vehicle by heating it to specified temperatures and then measuring the valve opening height to see if the height is within specification. If you are sure one of the thermostats...

Car has p052b code and clicking

Code P052B relates to the camshaft position timing not being correct. When this happens, this may causing timing problems as a result of inaccurate readings from the camshaft position sensor due to a variety of reasons, such as a faulty...

Leaking coolant and white smoke from radiator cap

Hi there. A blown head gasket is typically the result of an overheating situation, not the cause. So, if your engine has been overheating recently, it's possible that engine damage has occurred. However, it is more likely that the radiator...

Why am I getting warning messages in my 2006 Jaguar XK8

Hello. If you had gotten this warning message along with an overheating condition then I would be a little mindful about a possible cooling system issue. These can come and go sporadically if the issue is something like a thermostat....

I have a 93 chevy astro and im not getting spark to from my ignition coil

There is a problem on the primary side of the ignition circuit. If your distributor was not replaced and contains a Hall effect pick-up assembly that can be tested using a self powered “indicator light” that is made for this...

No heat coming out of vents?

Hi There, The leak coming from the cracked thermostat housing may have caused an excessive amount of coolant to be leaked out of the system which impacts the functionality of the heater core. The [heater core]((https://www.yourmechanic.com/services/heater-is-not-working-inspection) is a small radiator...

Transmission pan leak

Hello. If the gasket and sealant were applied and allowed to cure properly then you should not need to shift the pan in any sort of way. If the gasket is leaking then re torquing the bolts may repair the...

Rough idle and car dies - 2007 Chevrolet Impala

Hey there. This is a common sign of a dirty or failing idle air control valve. The idle air control valve monitors the air intake as it is mixed with fuel prior to being injected into the engine. This valve...

Acts like its going to stall during idle, sometimes hesitates to go

It sounds like you have a vacuum leak or intake air leak in the hose from the mass air sensor and the throttle body. If the tube has a crack in it somewhere, it will run rough and when you...

Related articles

The Best Used Cars to Buy That Can Be Towed Behind an RV
Summer Summer is a great time for a road trip, but often travelers like bringing all the conveniences of home along, in the form of an RV. Then they tow their car behind it – sometimes this practice is called...
A Buyer’s Guide to the 2012 Ford F-250
When When it comes to large, heavy-duty pickup trucks, the 2012 Ford F-250 only has two competitors – the Chevrolet Silverado HD and the Dodge Ram 2500/3500. Though the F-250 doesn’t outperform the Ram in the towing department, it certainly...
2011 Dodge Ram vs. 2011 Ford F-150: Which One Should I Buy?
Large trucks can be fun to drive, and even more fun to get dirty. Unfortunately, they may also cause you to get phone calls from friends who need to move into a new apartment. Fortunately, just having a truck may...