Ticking/tapping at idle when warm - just started
#1
Ticking/tapping at idle when warm - just started
I have an 03 Disco in the vin range with 90k. Runs like new but just developed an intermittent ticking/tapping sound (more like a light rapid tap, definitely not a knock) that seems to be emanating from the top of the engine on the driver's side. It happens mainly when warm at idle and disappears at around 1000 rpm. The car when running above that is full of power and quiet.
Before the usual suspects here start screaming - "You're F****d! It's the oil Pump! Get a new truck!" Sorry to disappoint y'all but my cold oil pressure at idle is 25 and cold pressure at 2k is 55. Oil pressure at hot idle is 20 and pressure hot at 2k is 51. So oil pump is good (you could eat off the engine when I bought it at 70k so my gut tells me this one got replaced early on).
I'm **** about oil changes and change oil and KM 301 filter every 2k with Rotella 15-40. I don't think it's a 'slipped liner' because a slipped liner is very rare on an 03 or 04 (different design), especially since it only rears its ugly head at idle and it's intermittent.
Someone here mentioned that sometimes a lifter won't fill and gets stuck and that one can sometimes remedy this right after an oil change by driving for 20 minutes or so at 2k or higher? Urban legend?
Anything else I can try without tearing down the top of the engine?
Thanks in advance. BTW: Truck runs perfect so if I have to live with it, I can.
Before the usual suspects here start screaming - "You're F****d! It's the oil Pump! Get a new truck!" Sorry to disappoint y'all but my cold oil pressure at idle is 25 and cold pressure at 2k is 55. Oil pressure at hot idle is 20 and pressure hot at 2k is 51. So oil pump is good (you could eat off the engine when I bought it at 70k so my gut tells me this one got replaced early on).
I'm **** about oil changes and change oil and KM 301 filter every 2k with Rotella 15-40. I don't think it's a 'slipped liner' because a slipped liner is very rare on an 03 or 04 (different design), especially since it only rears its ugly head at idle and it's intermittent.
Someone here mentioned that sometimes a lifter won't fill and gets stuck and that one can sometimes remedy this right after an oil change by driving for 20 minutes or so at 2k or higher? Urban legend?
Anything else I can try without tearing down the top of the engine?
Thanks in advance. BTW: Truck runs perfect so if I have to live with it, I can.
#5
Mine started tapping about a week or so ago. Have you crawled underneath to see if its louder under more then at the top? Here is what mine sounds like: DSCF2909.mp4 video by 94svt50 - Photobucket
#6
Mine started tapping about a week or so ago. Have you crawled underneath to see if its louder under more then at the top? Here is what mine sounds like: DSCF2909.mp4 video by 94svt50 - Photobucket
Any chance anyone else could post a recording of what their Disco sounds like?
Cheers,
Thomas
#7
That's it
Mine started tapping about a week or so ago. Have you crawled underneath to see if its louder under more then at the top? Here is what mine sounds like: DSCF2909.mp4 video by 94svt50 - Photobucket
What exactly is it? Hydraulic lifter that gets intermittently clogged? Would 10-40 be better than 15-40? It's been very cold this winter in so cal and I'm thinking maybe the 15-40 is too thick. It never did this in the summer.
#9
Mine actually started after I switched to 5w40 synthetic. I have tried going back with 10w40 and 15w40 but it makes no difference. The noise on mine is the loudest directly underneath the engine and equally loud when listening from each front wheel well. Its the quietest when listening under the hood at top of motor thats why I doubt its top end related. My current theory is one or two bigend rod bearings. I need to drop oil pan and have a look, I also ran my oil pressure numbers and they where all in specs.
#10