[penco8]

the car was park for 2 days in the shop for a power steering raplacement.. car was release today. ni hear a clicking noise only when idle . but if i press the gas the clicking noise disappears .... what could it be???/ i had this problem before.... it looks like it comes n go

[cdmccul]

Low oil pressure at idle? Have you ever put a mechanical gauge on it and taken readings?

[UPGI2AYDD]

lol Been a few threads about this lately.

My clicking/ticking/tapping or however you choose to describe it at only idle speeds is now gone, I switched to Mopar oil filters and use Lucas Oil Stabilizer with good brand name oil.

The Lucas is great stuff, it's very very thick, stick like honey so when the engine is off it clings to prevent dry starts, as well being so thick is raises the oil pressure.

Be aware though, I use to run 1L of it in my Ram's V8 all the time and in those -40C nights, with a weak battery she turns hard when starting. :P

As for the noise, no one seems to know, just theory's. Some that don't know these motors say bad lifters, other said loose or wore timing components. It's only present at idle so I don't hold to much worry.

[penco8]

same problem with me i use mpar oil filter.. n mobil 1 oil..... could it be a sticky lifter or i try to take a video so you guys can hear

[UPGI2AYDD]

Great idea, I'll do the same next time I heard it, if I hear it? (PRAYING I DON'T!)

Curious though to see if we share that same "click".

It sounds fine, it's just one of those curious sounds. My mechanic buddy said it sounds like a happy motor. I always originally figured it was the injectors at work. As I have had injected engines make a very similar noise (not DOCH engines)

[penco8]

here is the video let me know what you guys think
http://youtu.be/hp-zf26aNLw

[stopngo]

Have you ever taken a piece of hose one end to the ear used like a stethosope to try to nartrow down the Location

[UPGI2AYDD]

Jesus Christ, that's loud bro.

Mine is much much more quiet, but same type of sound and rhythm...

I'd almost say it's something like the timing chain links rubbing/tapping against a wore guide or a lifter is wore?

[penco8]

yeah is kinda of loud i can hear it when i stop in red light .... but this noise comes only when car is idle.... am not familiar with these sound .... lets wait for the experts...

[UPGI2AYDD]

From the research I've done:

If it were a spun or worn rod bearing, it'll knock/clunk loudly and can be confused for lifters depending on how bad the case is. The sound would be present no matter RPM, and doesn't "come and go". It'll just knock/clunk until it throws a piston out of the bottom or top of the engine.

Something specific to these 2.7's that can be diagnosed as bad lifers or spun rod bearings is a cracked or failing flywheel, said to be a cheap part, around $35?

I also read up on some media and videos that discussed and demonstrated the same sound/rhythm, the coined term for this sound is "valve/lifter chatter", which can be out of timed/spec'd cams or worn lifters or chain tensioner's.

Curious what the pro's think?

[penco8]

hopefully some 1 with knowledge chime in... ")

[cdmccul]

That tap is not lifters or rod bearings - WAY too fast. That is timing chain slap I'd bet.

Have you pulled the upper chain covers or the front covers of the motor to see what they look like? You may get lucky and just have worn chain guides or tensioners.

I really doubt it is rotational noise from the crank

[stopngo]

I have or HAD a Tapping sound as well. But I cannot say that it is identical to the sound in the video.But I never heard it the last time I started it before I drained the oil and pulled the pan for bearing inspection.

The sound I had was non existent at cold startup. But as the Engine approached the halfway warmup is when it occurred and then always dissapeared at full operating Temp.It sounded like a noisy lifter.

Using a Garden hose as a stethoscope the sound concentration was clearly at the Right Bank precisely at the Camshaft Sprocket which caused me to suspect Timing Chain Slap.

I now have the Timing Cover Removed and there is no evidence of such and the Timing chain is as Tight as a Drum absolutely Everywhere...............but as I said the noise stopped a short while ago causing me to wonder wether the Chain Tensioner just happened to spring back into action just prior to my dismanteling. But no sign of chain slap to be seen anywhere.

Any Ideas?? About a noise present only at mid warmup and gone at operating temp?? Rod Bearing is ruled out due to perfect bearing clearances (I think)

[TrepCruzin]

since the shop was messing with the power steering pump I would look at the serpentine belt and namely the the idler pulleys......it seems to me the sound is coming more towards the front of the motor and that general area and at about the right speed......

[TrepCruzin]

yepper as I hear it again I don't think it's engine related