its in a new to me Durango, 2003 with 155,000 miles and the 4.7 magnum. when i first got it, it tapped some when starting up but after a minute or two it quieted down. I changed the oil to Mobil1 10w30 and it seemed to get worse/last longer. Then I thought well, I better use a thinner grade so the oil will protect better while cold so I switched to Mobil1 5 w30. NOw it takes even longer to go away.
No idea what the dealer had in the engine when i bought it but it looked like it needed to be changed. (dark, etc) come to think of it the Mobil1 I drained out of it after about 100 miles looked crappy as well.
So should I try a thicker oil at this point? the way it was when i got it home, I could have lived with it, just warm it up for 2 minutes and go. Now with the M1 5w30, its noisy for 6 minutes and I swear it never quite goes away.......
And besides that, what is the FIX for this? I see its a common problem, but nowhere have I seen what to do about it. Ive read valve lash adjusters....rocker arms...that there was a service note about using new style rockers with larger/different oil passages....anyone try drilling the old ones out?
What exactly is slapping here, and is it a clearance problem or an oil pressure issue? (in general I mean--of course no one can tell me what is wrong with my engine, but if this IS a big problem as I see it is, what is the likely culprit?
Seems the eventuality here is rocker arms falling off, misfire codes, etc...nothing like that on mine except I DO have an evap purge valve code.....
I have access to cheap used parts...is there anything I can do under the valve covers to address the noise and again, what about oil? If I can get it back to shutting up after 2 minutes I will just drive it till it breaks.
Thanks in advance for any insight!
I should add, it runs well, has PLENTY of power.
Edited by NeilG, March 14, 2013 at 01:20 pm.