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greendak
Dodge Dakota
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2/28/2005
22:10:56
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 Subject: Noisy 4.7
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I just purchased a used 2001 club cab SLT green dak with 62000 kms. It has the 4.7 auto, and 3.55 rear end. Cold engine starts are very noisy with a loud ticking or tapping sound for 3-5 min. Once it has warmed up the noise is less but still there. I don't think it is the purge valve or the injectors. Any ideas on what this noise is?
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Gaston
Dodge Dakota
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3/01/2005
00:42:22
|  RE: Noisy 4.7
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Previous owner probably used Pennzoil, and now the lifters are gummed up.
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Figols
Dodge Dakota
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3/01/2005
09:28:15
| RE: Noisy 4.7
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It's the hydraulic valve lash adjusters. It seems to be common for the 4.7. I ran some Auto-Rx through mine and it seemed to help quite a bit. It's still there to some degree, but is much better. I have new lash adjusters to put in, but I'm in no hurry since it's been tapping for over 20K miles now.
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Read This
Dodge Dakota
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3/01/2005
23:27:17
| RE: Noisy 4.7
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Here's all the Service Manual says about it:
" A tappet-like noise may be produced from several items. Check the following items.
(1) Engine oil level too high or too low. This may cause aerated oil to enter the adjusters and cause them to be spongy.
(2) Insufficient running time after rebuilding cylinder head. Low speed running up to 1 hour may be required.
(3) Turn engine off and let set for a few minutes before restarting. Repeat this several times after engine has reached normal operating temperature.
(4) Low oil pressure.
(5) The oil restrictor in cylinder head gasket or the oil passage to the cylinder head is plugged with debris.
(6) Air ingested into oil due to broken or cracked oil pump pick up.
(7) Worn valve guides.
(8) Rocker arm ears contacting valve spring retainer.
(9) Rocker arm loose, adjuster stuck or at maximum extension and still leaves lash in the system.
(10) Oil leak or excessive cam bore wear in cylinder head.
(11) Faulty lash adjuster. "
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greendak
Dodge Dakota
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3/02/2005
22:23:41
| RE: Noisy 4.7
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Message:
Thanks for all of your answers. I'm taking it to the dealership tommorrow to hopefully fix the problem. Thankfully the truck still has the powertrain warranty. I will post the outcome when I get the truck back.
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