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Good Morning Everyone. My question is about a noise that I believe is coming from my engine... or at least some rotating component attached to the engine. The sound is a sort of clank, not a tick like lifters make, and it doesn't seem to be rapid enough to actually match the engine rpm..... This being said it DOES change with an increase in rpm. It reminds me of the sound older diesel truck engines make at low rpm or when they are cold. The clanking...... The biggest problem I have in diagnosing the sound is that it only happens under load, and is the worst at low rpm. For example, when I drive home there is a water/runoff dip in the road right before a hill. So I slow down, go over the dip and accelerate up the hill; at this point in 2nd gear I'm around 1500-2000 rpm.This is when the noise is the most prominent, possibly because there is little wind noise at that slow a speed and the engine noise in limited at that low a rpm. The engine ALSO has a ticking noise that either fades or stops suddenly when the engine is warmed usually. I have (according to the oil pressure gauge) upwards of 65-psi at 3000+ rpm and 15-psi at idle which I believe is appropriate for this vehicle. This I'm figuring IS a stuck lifter that frees up when the engine warms but I thought it was worth mentioning. Any ideas? Thanks.
