Jayridium
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TLDR - if your TD4 engine sounds tappety, park it up, vehicle in neutral and rev it to 3000rpm holding that engine speed for one minute or more, and the tick will be gone for a little while. The tick will likely reemerge, so do the 3000rpm / 1min again and immediately before draining the oil and do an oil change, and that will cure it.
Afternoon all, not entirely freelander related, but not entirely irrelevant either... A few months ago, when coming up due for one of my more frequent than prescribed oil changes, my BMW 635d, which has an M57 engine, essentially the big brother of the M47 in the FL1 TD4, developed lifter tick, ie sounded tappety. MY heart really sank thinking damn, thats' going to be a couple of hundred pounds of plifters + a tonne of work. fortunately, I found an easy solution, which I'm about to elaborate on.
I think the M57 is more prone to lifter tick than the M47, but it's closely related, and our M47s are getting old now, so this could be relevant. Essentially the trick is park the vehicle up, and hold the engine at 3000rpm for one minute in neutral. This off-load fast revving increases oil pressure, and flushes the lifters removing the sticky gunge that most likely has formed inside. The M57 seems to be prone to clogging it's lifters because it's got such a wall of torque from tickover than they tend to be clugged at low revs and lower oil pressure's flow rates than would be experienced at higher rpms. So in theory a TD4 driven around the doors at low revsis more likely to be susceptible to this than one doing a higher annual mileage as the motorway work would have the engine further up the tacho for longer periods solving this.
From my own experience, doing the 3000rpm / 1min trick would solve the tick for about a week, then I did an oil change, preceded by a 300rpm / 1min exercise to A: heat the oil to drain easier and B: flush any gunge out the lifters into the soon to be drained oil, and the tick has never re-emerged.
Afternoon all, not entirely freelander related, but not entirely irrelevant either... A few months ago, when coming up due for one of my more frequent than prescribed oil changes, my BMW 635d, which has an M57 engine, essentially the big brother of the M47 in the FL1 TD4, developed lifter tick, ie sounded tappety. MY heart really sank thinking damn, thats' going to be a couple of hundred pounds of plifters + a tonne of work. fortunately, I found an easy solution, which I'm about to elaborate on.
I think the M57 is more prone to lifter tick than the M47, but it's closely related, and our M47s are getting old now, so this could be relevant. Essentially the trick is park the vehicle up, and hold the engine at 3000rpm for one minute in neutral. This off-load fast revving increases oil pressure, and flushes the lifters removing the sticky gunge that most likely has formed inside. The M57 seems to be prone to clogging it's lifters because it's got such a wall of torque from tickover than they tend to be clugged at low revs and lower oil pressure's flow rates than would be experienced at higher rpms. So in theory a TD4 driven around the doors at low revsis more likely to be susceptible to this than one doing a higher annual mileage as the motorway work would have the engine further up the tacho for longer periods solving this.
From my own experience, doing the 3000rpm / 1min trick would solve the tick for about a week, then I did an oil change, preceded by a 300rpm / 1min exercise to A: heat the oil to drain easier and B: flush any gunge out the lifters into the soon to be drained oil, and the tick has never re-emerged.
