Who changes their own oil? Raise your hand. Well I have noticed that after I change my oil and I start the engine I get a rattling noise from the engine for the second it has no oil pressure. As soon as it gets pressure in the system the rattling goes away. I do nothing special when I change my oil other than letting the oil drip for a good 10 minutes and I fill the filter with oil before it goes on. WTF?? Oil pump on its way out or something or am I just hearing another normal Ford noise.

 

I change my own oil, but i gots me a different motor.

I remember hearing something about the timing chain rattle. Someone said it was more apparent right after the oil change...

 

IDK, could be dry lifters or somehting. I hear a ticking noise in my truck when i let it sit for a few weeks. Letting the oil drain all down into the pan. I hear it for a short time. Could be that?? Maybe timing chain. I hear they go on 4.0l (oh snap, chainfire beat me to that) lol...

 

I have NEVER filled my oil filter with oil before an oil change. Never even HEARD of doing that. I just dab some oil on the rubber gasket near the threaded hole, and screw it on.

The rattle could just be the lack of oil in the system until you get everything lubed up after letting it run for a few minutes.

 

Really?
Ive always been taught to do that. It helps minimize the time it takes for the oil to get to the engine.

 

Well I the noise is a fast rattle. Next time I change my oil I'll take video of it.

 

I get the same thing. I think it might be what Jimmeh says above... lack of oil in the system for a few seconds. I dont like that noise either.

 

I don't know if the 4.0L SOHC timing chain tensioners are operated from oil pressure, like some engines, but if they are, this would expalin the noise until you have oil pressure. The other possibility would be valve lifters, which do rely on oil pressure.

 

Good point. I'm not sure if the tensionors use oil pressure or not though. I was thinking lifters at first but it sounds too "fast".

 

It is because there is no oil in the filter for a split second. And if there is no oil in the filter then for that split second it is filling the rest of the motor is not getting oil. If you want to prevent this then you can fill your filter before installation next time. WARNING: You might get some oil running down your arm because it is a pain in the *** to do.

 

Mine does that when I change the oil too, It sounds like the bottom end on mine, like it may be main or rod bearings

 

But there is oil in his oil filter. He states that he pre-oils it, just like I do.

 

When you drain the oil it takes most/all the oil out of the motor, resulting in poor/no lubrication in the top end. Even tho you fill the pan with oil from the top of the motor, on initial start-up after an oil change, there is still little/no oil in the top end untill it produces adequate oil pressure. the noise you are hearing is just the valve train starved of oil for a few seconds. It's annoying yes, but not harmful. Think of it this way: Over the life of any motor, how many oil changes will you do? Answer: Hundreds if not thousands.

Nothing is broke or breaking, just lack of lubrication on initial start up. Hopefully this helps.



*Correct me if I'm wrong, I'm only speaking from my own personal experience*

 

spot on

 

They are operated on oil pressure, in fact, there was a TSB on some of the earlier ones for them draining back and hearing this noise at every start-up. I think only the rear chains are oil pressure tensioned. another SOHC fantastic idea

 

Sounds normal, what weight are you using?

 

Agreed, but you might want to redo your math. I doubt most people do 100 oil changes on a motor(assuming 1 oil change every 3000miles).

 

I change my own oil and ive never heard this noise before.

 

5w30.

 

I was tired when I wrote that lol plus I suck at math :P

 

That's what I said. Only not as technical.

lol

 

I do my own oil changes.

I too, put some oil into the new filter going on, but I only fill it up to about an inch below the top - less chance of spillage that way when it is placed on.

I haven't noticed any perceptible noise when I start up the engine after an oil change.

OIl and filter changes are done every 5,000 km (~3,000 miles) like clockwork.

Truck is approaching 300,000 km (~190,000 miles), all original - just recently performed the 295,000 km oil and filter change.

FWIW, I've been running synthetic oil for about the last 4 years or so - 5 W 30 grade, as per specs.

 

I took a vid of the noise but it doesn't do it as bad now that I'm using Amsoil. You can hear it as a slight fast ticking that quickly goes away after it starts.

 

mine does this after a oil change its due to lack of oil the motor isent geting any oil till it fills up the empty oil filter. now if i set and put a half of quart in the new filter and then put it on the noise is gone. every place i have worked at changing oil are seen them changing oil the pre oil the filter it helps prevent dry start up's

 

^^^Yeah you just get a slight lifter tick. When this happens its a really loud rattle that sounds like the chain is going to bust through the timing cover. Completely different sound.