Engine noise after Hard driving.
#7
You must be in Europe! Don't have that oil here.
In any case, you might consider switching to a diesel truck oil. Most modern car oils have dropped the additives (mainly zinc and phosphorus) that are helpful for flat tappet engines like ours (most car engines these days have roller tappets). That oil, in particular, has dropped those additives for emissions reasons. Unfortunately, I don't know if you have high-ZDDP diesel oil available in Europe.
In any case, you might consider switching to a diesel truck oil. Most modern car oils have dropped the additives (mainly zinc and phosphorus) that are helpful for flat tappet engines like ours (most car engines these days have roller tappets). That oil, in particular, has dropped those additives for emissions reasons. Unfortunately, I don't know if you have high-ZDDP diesel oil available in Europe.
#13
Correct me if I'm wrong, but I thought ZDDP was only required for flat tappet engines, not HLA's like we have.
Most have great luck with the Rotella T6. I've been running it for a few years and it's cleaned my engines up nicely. I'd recommend giving it a try for a few thousand miles, and see if that helps the noise. It doesn't sound like anything piston related to me, and the odds of a collapsed lifter are pretty low.
Edit: I just listened to it again, and it sounds very much like when I cleaned all of my HLA's and they hadn't been pumped full of oil yet. The noise went away after they had filled.
Most have great luck with the Rotella T6. I've been running it for a few years and it's cleaned my engines up nicely. I'd recommend giving it a try for a few thousand miles, and see if that helps the noise. It doesn't sound like anything piston related to me, and the odds of a collapsed lifter are pretty low.
Edit: I just listened to it again, and it sounds very much like when I cleaned all of my HLA's and they hadn't been pumped full of oil yet. The noise went away after they had filled.
#15
Gotcha. I guess I didn't really understand the difference (and I didn't bother to find out before I spoke).
Much I have heard and read about ZDDP has led me to believe that modern oils have diminished the requirement for it to the point of almost nonexistence, and that adding it can seriously diminish the lubricating properties of the oil. Perhaps that is part of the noise issue?
Much I have heard and read about ZDDP has led me to believe that modern oils have diminished the requirement for it to the point of almost nonexistence, and that adding it can seriously diminish the lubricating properties of the oil. Perhaps that is part of the noise issue?
Last edited by dieselmiata; 05-03-2013 at 09:18 AM. Reason: Spelling error
#16
That's correct. The latest specification for oils is more based upon emissions and fuel economy than upon lubricating properties. I'd bet that this is even more so in Europe.
Flat tappet just means that the surface of the lifter that is in contact with the camshaft lobe is a flat, solid surface. The contact point is designed to be a bit off-center so that the lifter rotates in its bore and provides some "rolling action." But that is a far cry from having a true roller.
Rotella T-6 would be good if OP can get it. I'm not sure it's available in Europe though -- and even if it is, the European formulation may be quite different.
Flat tappet just means that the surface of the lifter that is in contact with the camshaft lobe is a flat, solid surface. The contact point is designed to be a bit off-center so that the lifter rotates in its bore and provides some "rolling action." But that is a far cry from having a true roller.
Rotella T-6 would be good if OP can get it. I'm not sure it's available in Europe though -- and even if it is, the European formulation may be quite different.
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