My V6 is making a horrible noise, and aside of a short period where it was much better, it always has!
https://www.youtube.com/watch?v=gErkVUU93yMThe story behind it is that the car was once a 2.6. I transplanted a 3.2 block, and then fitted late 3.0 heads (which are the same as 3.2 heads) with 3.2 G and J Cams.
When you start the car from cold, it's silent. Beautifully silent, no tapping or knocking.
As it starts to warm up after a few minutes of idling, (maybe 2-3 minutes) a "tap tap tap" noise starts to creep in... and before long at all it's just like it is in this video.
If you then drive the car for a good distance, say ten miles, it goes quiet(ish) again, but is still detectible.
I don't think it's anything terminal. It's done about 700 miles like it.
New oil went in at the time of the top end rebuild. After 200 miles and this problem still being there, some wynnes lifter treatment went in. No difference.
A further 500 miles later, (today) I dropped the original (I think 5/30 fully synth) oil and let it drain. I then refilled with 10/40, and ran the engine for an hour. I then drained this new oil (which came out looking as good as it went in) and put ANOTHER load of clean 10/40 in.
During this the sump has been off and the strainer is clear.
Does anyone have any views on this noise? Keep plugging on with more short oil changes?
Sometimes I think it sounds like a lifter, and other times I do not!
The car pulls like a train and there are no nasty noises when driving and no oil pressure lights etc.
I'd be v grateful for your views, please
