everytime i start my car in the morning it does a rattle or slight knock for a sec. What could it be iv heard its common in the 2v's its really starting to worry me
cold start rattle
- Thread starter sonic281
- Start date
I've had a bearing fail in a motor. And been present when a few were going/gone. In every case the issue was most apparent at high rpms. They would sound fine at idle and if you didn't rev high you might never know what was coming. On the other hand, an "issue" that presents itself only on a cold start for a few seconds at most is not an issue for concern. IMHO. YMMV, of course.
Mine does make a noise on some cold starts, like three rattles on the first three revolutions of the motor. It's now done it for years. I think it's the pistons loose in the bore combnined with an aftermarket oil filter that lets the oil drain totally out of the engine when it's off. I'm going back to motorcraft oil filters on the next oil change, but I don't really expect a change.
Mine does make a noise on some cold starts, like three rattles on the first three revolutions of the motor. It's now done it for years. I think it's the pistons loose in the bore combnined with an aftermarket oil filter that lets the oil drain totally out of the engine when it's off. I'm going back to motorcraft oil filters on the next oil change, but I don't really expect a change.
yeah iv heard its piston slap it dont make any noise in high rpm so your probaly right nothin to worry about.
trinity_gt
10 Year Member
mransr
Founding Member
the timing chain can make a noise like that on a cold start up when it it starting to wear...but ya, what oil filter are you using?
i took it to a place for an oil change last cuz i dont have a filter wrench and couldnt get it off by hand like usual so i dont know what it is. but usually a fram should i use motocraft?
flstang65
10 Year Member
NOOOOO to the Fram. They like to use cardboard in their filters. I use (in this order based on availability) Ford Racing, Motorcraft, Mobil1 or Bosch
What do the other ones use that hold the oil better? I just got my oil changed so i can change the filter
Stumbaugh
Member
If that was the case, it would be a tick at all times while the engine was running, not just on cold start up.
trinity_gt
10 Year Member
Although I haven't tried them all, I have tried a number of different filters over the years in my car and the empirical evidence suggests that the Motorcraft FL820S is the best all-round filter for the modular.
All filters have anti-drainback valves in them that are intended to keep oil in the engine's oil passages from draining back into the pan when the engine is shut off. It seems like the FL820S is among the best at actually holding oil up in the engine. The noise you're hearing is likely being caused by this: It takes a few seconds for the oil pump to re-fill and pressurize the galleries.
You can buy the filter at a dealer and have the oil change place install it while doing a change...
wmburns
SN Certified Technician
The timing chains rattle on cold start is a very common issue. It's caused by the timing chain adjuster needing oil pressure to work. The rattle stops when oil pressure comes up.
If the rattle is excessive, this may be a sign that the timing chain shoes have worn through. Consider getting an oil filter cutter to cut open the oil filter. Look for bits of metal on the filter element.
After having a motor fail because of this same problem, I now routinely cut open the oil filters at every oil change.
If the rattle is excessive, this may be a sign that the timing chain shoes have worn through. Consider getting an oil filter cutter to cut open the oil filter. Look for bits of metal on the filter element.
After having a motor fail because of this same problem, I now routinely cut open the oil filters at every oil change.
flstang65
10 Year Member
That's right, I had forgotten that. I had just assumed it was pistons until a post by wmburns mentioning the timing chains a little while ago. Just forgot about it when I posted.
Is it a sign of wear? My car has 72,000 on it and it's eight years old. The parts can't last forever. Would it simply be smart to plan on replacing them sooner rather than later? It just seems a part that was formerly silent now makes a little noise...
If I'm going to spend the money I'd rather do it before it fails rather than after. What's the suggested replacement schedule for the chain guides? Is there any reasons for doing it early?
Thanks, BTW, because that noise has been bugging me.
1987stangman
Member
- Jul 12, 2006
- 684
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If it helps the engine in my car had 69k on it and a guide broke BUT the original NPI engine I took out was running strong with 143K on it and when I pulled the front cover everything looked great.
Replacing it early would just give you good piece of mind in this case.
lately i been doing a quick tap on the starter twice evermorning then starting it and it dont make the noise
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