Question about 2004 Chevrolet Silverado

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Have tapping noise in oil pan area of 2004 5.3l chev silverado owned since new. noise started suddenly. Seems to quieten down some after warmed up. Speeds up with RPM's... opinion on what cause is ? - mileage 130K - oil change every 3k miles, maticulous maintenance records. no engine repairs ever

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Sounds like a worn big end bearing. Not a disaster as you have caught it early. Drain engine of oil and remove pan. Remove spark plugs and disconnect battery. Undo big ends, fit new bearings, refit the big ends and tighten to specified torque. Might be an idea to also replace main bearings as a preventative measure whilst everything is open. The main journals on the crank are probably fine. Check the journal facings of the removed bearings and determine not only how much wear but the wear type. I would try using 5-40 (or 5 -50) fully synthetic multigrade oil but not change it so frequently (15K is plenty). These oils are thin when cold and help avoid high shear forces within the bearings at cold temperatures whilst keeping a good viscosity at high running temperatures - good for the more mature engine. Because they are fully synthetic they keep their properties for a very long time. Good luck

Posted on May 01, 2010

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Sounds like your hydroilc lifters(cam followers) are on the way out

Posted on May 02, 2010


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I ran my 2.2 Vauxhall astra very lo on oil, all of a sudden it started making a loud tapping noise coming from what seems like the very top left hand side of the engine, I immediately filled it up with oil...

Yes the noise is the lack of oil to the cams as these will lose the oil pressure first ,these engines are using hydraulic tappets so no doubt the oil was squeezed out which means the tappet gap is too wide ,i think you may be better off just getting another engine from scrap yard ,new timing belt and fitting this engine as no doubt a local garage will try to give you a complicated excuse for a bodgy repair that will not last long,you would need to remove the rocker at the least and have a better look to get some idea of the damage ,if the cams are damaged then its another engine or trade it in quick after adding a can of STP

Jan 19, 2014 | Cars & Trucks

1 Answer

Clanking noise coming from Allison Transmission on a 2001 Chrevrolet Silverado 8.1 Liter engine

this does sound like theres a loose line tapping the engine/frame,during warm up the engine idles faster which could make it vibrate faster causing the the clanking or tapping noise,if this has started after trans fluid change,then check the lines running from the trani to radiator sometimes the service person might bang into something causing plastic clips that hold the lines to break,try getting under it and have someone start the truck and listen to see where it's coming from also hold the lines & see if the noise stops,the service guy could have unbolted something & never put the bolt back causing the clank ex.line may have a clip holding it thats bolted to the trani pan ?good luck

Dec 29, 2012 | 2001 Chevrolet Silverado 2500HD

1 Answer

I have a 2002 chevy silverado 1500, when I start it and its cold it makes a tapping noise until it warms up. it makes the noise from the top. is this a serious problem?

Sounds like a hydraulic lifter that looses its prime while not running.

A hydraulic valve lifter transfers the rotating motion of the camshaft to the valve train, causing valves to open and close as dictated by crankshaft and ignition requirements. It operates on a cushion of oil in its bore.

It's not uncommon for this to happen, especially if this is what one might consider a "high mileage" engine. Since you've indicated it quietens down after it warms up, it shouldn't be considered a serious problem. Regularly scheduled oil and filter changes, using a good multi viscosity oil and a good oil filter can do wonders to prolong the effective life of your engine. I run Pennzoil 10w30 and Fram filters....but there are many good brands out there.

You might want to consider a good quality oil might improve the situation.

Personally, I'm partial to Lucas Oil products. These are available in most auto parts stores, and I've also seen it in WalMart (usually a little cheaper).

In any event....good luck!

Feb 01, 2011 | 2002 Chevrolet Silverado 1500

2 Answers

Clicking or tappting upon starting

Should be using 10w30 or 10w40. You probably have a lifter knocking. Instead of using 5 quarts of oil replace one of the quarts with an oil additive. I use a quart of Lucas Oil in my vehicles every oil change. The stuff works wonders!

Dec 22, 2009 | 2002 Chevrolet Silverado 1500

1 Answer


If the knock goes away after it warms up there are 3 possible causes for this:
1. The pistons are slapping meaning there is piston or engine wear.
2. There is carbon on the top of the pistons. This is the most likely cause.
GM says this is not detrimental to the engine.
3. The o-ring between the oil pump screen and the oil pump may be cracked causing areation of the oil. This one was supposed to be there from the time the engine was new but I have seen the problem appear at 50k miles. The oil pan will have to come off to replace the o-ring.

Nov 29, 2009 | 1999 Chevrolet Silverado 1500

1 Answer

I have a major tapping noise from a 3lt diesel turbo toyota surf .constant loud tapping ,quietens with oil pick up a little. not a knocking just a tapping

lifters noisy,lots of miles on engine?as oil pressure gets higher and engine warms up(everything expands a little and quietens a little)it gets better,try fresh oil thats thicker for worn engines,and or check tappets(valve adjustment)if its applicable to this engine

Oct 28, 2009 | 1996 Toyota Land Cruiser

3 Answers

5.3 chevy loud hammering noise

My best guess is that you might have thrown a rod. You will experience a great loss of power, and if you were to drain your oil, you would notice a decent amount of metal chunks. Generally a light tapping noise is uncommon for a engine with 80k, but depending on how well it has been taken care of (ie. oil changes, high RPM, low grade fuel) it is possibe to damage an engine with that low mileage. You would be better off taking your vehicle to a reputable mechanic that has access to rebuild parts. Good Luck.

Jun 01, 2009 | 2001 Chevrolet Silverado

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