1998 GP, 140k
This noise started yesterday (11/12/2010) when weather got cold.
It started in the morning, I drove a mile, disappeared. (about 9:00)
Around 1:00pm, it wasn’t there when I started, drove to work, no noise. (1:40pm)
It rained VERY hard while I was working inside. When I got off work, 4:00pm, it was worse. That’s when this video was recorded.
Took it to a shop on my way home(30mi, 4:45pm), it was still there. I thought it was somehow related to raining because it was raining on my way home. They added BG MOA, hoping to clean lifters, I was also told that this won’t harm anything.. (hmm?)
So I did some googling last night, and I found a suggestion to rev to 3000rpm for 15 seconds, idle for 15 seconds, repeat.
Tried that this morning(11/13/2010), and it went away after doing it about 5 minutes. So it seems to go away when enough oil pressures builds up? I guess?
I tried driving anyway with the noise, it doesn’t seem to affect its drivability, but if I don’t get rid of the noise with revving up, it will follow me to my destination. ::
Here’s some records that’re done recently.
11/9/2010 had a coolant leak. Replaced: hose fitting, t-stat, upper radiator hose, water outlet(L elbow I think), upper intake plenum, EVAP solenoid.
10/25/2010 regular oil change. Changed brand from Quakerstate to Valvoline.
I read somewhere Valvoline can cause this..but I can’t find it again.
Here’s the video:
YouTube - lifter noise when cold
Any suggestion is appreciated.
PS - disregard my low coolant light.. bad sensor.
