Engine has clatter sound at startup
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Engine has clatter sound at startup - 5/4/2008 7:58:34 PM
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MstrMstr
Posts: 10
Joined: 4/6/2008
Status: offline
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My 5.2 has started to make a nasty lifter like sound or noise at startup.
Worse noise when left to sit before restart.
Sounds like marbles in a tin can and is loud.
Goes away when oil pressure kicks in.
( I have a nice newish pump from Mellen putting out perfect pressures.)
Got much worse after a oil change.
(failed anti-drainback valve on the cheap filter?)
My compression is nice and equal.
I really can imagine the lifter gallerys starved at startup...It sounds exactly like I was tuning a solid lifter engine back in the 60's.
I was thinking of putting my hand on the cold engines valve covers to feel the clatter!!
What gives???
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RE: Engine has clatter sound at startup - 5/4/2008 10:22:16 PM
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varsis
Posts: 1255
Joined: 10/8/2006
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Sure it's not something else? Might just be a bad valve guide or something, and once it hits the right temp it expands large enough to stop the clatter...? Maybe a lifter? Does the engine perform different? Like idle badly ect...
Need some ideas to narrow it down? Distinctively one side? both sides? Could just be the manifold bolt or something, and pipe, starter coming loose? I am guessing a manifold...
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RE: Engine has clatter sound at startup - 5/5/2008 4:15:02 AM
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JasonA
Posts: 348
Joined: 3/24/2008
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Sounds like timing chain rattle. But you wouldn't think that would happen all of a sudden. That's not uncommon for engines with long timing chain runs with tensioners, but that's not the case with the 5.2L. So how long does it rattle after you start it? Oil pressure should build IMMEDIATELY after you start it. If it was purely oil-pressure related, you shouldn't hear it for more than 1 second...maybe less. It may be a bad ADBV in your oil filter. That would be a cheap first fix. I've had decent luck with the Mopar-branded oil filters that you can get at Wal-Mart. It's $4.88 for the MO-090 filter, and it's got a quality ADBV and pressure relief valve. It appears to be the same, internally, as the Purolator filter (based on construction techniques).
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RE: Engine has clatter sound at startup - 5/5/2008 3:51:25 PM
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moe7404
Posts: 355
Joined: 7/7/2007
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moe in wichita ks
sounds like an anti-drain back valve in the filter.
the most important thing about oil is to have lots of zinc in the oil. i have done some searching on the internet on oil, filters, additives. i like to have oil as thick as i can and it still start in cold. so here is what i use, 2001 dak v6. Valvoline premium blue 15w-40 oil it has lots of zinc in it. Purolator PL 14670 PURE ONE filter, short ver same length as a fram ph43, use only a PURE ONE filter that is shown by the P in the part no, the long version is PL 30001 the long ver is the same length as a fram ph8a, may not fit all frames. under NO conditions use a fram filter. then you need to go to zddplus.com site and get some zinc from them. my truck starts ok in the winter, but we normally dont get below 0 f.
i did have trouble with 20-50 not wanting to turn over in the winter
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RE: Engine has clatter sound at startup - 5/7/2008 7:24:11 PM
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MstrMstr
Posts: 10
Joined: 4/6/2008
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ANSWER--It IS the anti-drainback valve in the oil filter.
When I had my oil pump changed a bit of flotsam managed to just barely plug the steel valve open just a wee bit.
At the request of my dealer, I now use the newest Mobil 1 filter. It's designed to be more forgiving with a better ADBV neoprene seal. I did a web search and at under $10, its now the filter to beat. Not pushin the brand just the quality.
I am the type of guy who cuts open filters with my trusty pipe cutter just to see what was inside and what the filter does filter.. If the oil pump can crush it, it will go to the filter... wire -casting sand-hardened sludge- the works.
Just for a general chuckle.. Magnum engines are out of production, FACT..
Maybe because I found a guys wristwatch in my oil pan(from the factory) TRUTH.
Davis
Thanks for the help guys!!!
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