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2004 Discovery Tap Passenger Side
Bmw m5...hydraulic lifters Porsche 944 & 928..hydraulic lifters Ferrari 355 (i misremembered that it was a Testrossa issue initially)...hydraulic lifters Not to mention chevy small blocks i in spades, 283 & 327s galore in old Corvettes where this has worked as well You were saying?- grumpy_bottom
- Post #10
- Forum: Discovery
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2004 Discovery Tap Passenger Side
I read it. Running 5w 40. 5w is getting through passages cold that 40w isn't when hot, at idle, when oil pressure is low. Rev, build pressure, lifter regains hydraulic pressure. I stand by my diagnosis. And tsbs? Are you serous? Some of the best mechanical diagnostics I've been around...- grumpy_bottom
- Post #8
- Forum: Discovery
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2004 Discovery Tap Passenger Side
I would counter that thirty years of not doing it doesn't make it wrong, nor does it in any way invalidate fourteen years of actual, empirical evidence showing that it works, and that its safe for engines that are subjected to far higher stresses than ours.- grumpy_bottom
- Post #6
- Forum: Discovery
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2004 Discovery Tap Passenger Side
I've been told by Porsche, Ferrari, and BMW techs to rev, its necessary to get the oil pressure up enough to get the atf through the clogged passageways. I've done this on Z8s, Testarossas, and other higher performance cars, but never with 5-6 quarts...1-2 has always been plenty- grumpy_bottom
- Post #4
- Forum: Discovery
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2004 Discovery Tap Passenger Side
Likely a deflated lifter. Drain one or two quarts oil, replace with equal amount atf, run to operating temp, once temp is reached, rev to 3-4k for 3-5 minutes (essentially until tapping goes away). Drain oil and filter, replace with quality 10-40 synth. If it gets better bit doesn't go away...- grumpy_bottom
- Post #2
- Forum: Discovery
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4.6 03 Discovery clicking
Noisy lifters that have lost oil pressure can usually be rehabilitated by draining 1-2 quarts of regular engine oil, adding back the same amount of ATF, and running at no load (i.e. not while driving) between 2000-3000 rpms until they quiet down. Once they do, change oil completely right away...- grumpy_bottom
- Post #18
- Forum: Discovery
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4.6 03 Discovery clicking
Have you already tried the ATF trick for noisy lifters before giving someone lots of $ to tear the top end apart? I sort of assume that Disco Mike would have given you this suggestion as a "first shot" but just in case i figured i would ask.- grumpy_bottom
- Post #12
- Forum: Discovery
