5.3 engine loud tick/ knock

Asked by Dec 30, 2015 at 10:18 AM about the 2012 Chevrolet Silverado 1500

Question type: Maintenance & Repair

I have a 2012chevy Silverado 4x4 5.3 flex fuel it just turned over 118,000 miles
The engine has ran fine and has never used any oil at all, and the oil has been changed every 5000 miles since its been new. Now just over 118,000 miles its started to knock/ tick and it sounds like its coming from the rocker arms from cylinder 1 and 3. I pulled off the valve cover and checked the rocker arms and watched them when the engine was running. Everything looks ok, but I did notice that the oil only trickles out the rocker arms as if low oil pressure, and my oil pressure usually ran at 40psi at idle, now its at about 30psi and fluctuates up as high as 50 or 60psi during acceleration. I`m guessing its losing oil pressure someplace, Top end leak? Any ideas or similar problems and fixes? I have read about the oil pump pick up tube O-ring and this sounds like my loss in oil pressure, but would like to know if anyone else has replaced this O-ring and it cured their problem!!
Email me at strayufo@gmail.com
with commits and answers

3 Answers

58,285

Yes I have heard about the o-ring ordeal. You took care of that motor, just need to fix a flaw, before adjusting the rocker arms. A little oil flow across the rocker arms is normal. One other thing that has nothing to do with the engines actual oil pressure, Is you may be getting false readings from the gauge. GM had put a fine screen type basket under the oil pressure unit that gets gummed up. The oil pressure sending unit needs to be taken out and that screen fished out and cleaned. Then the gauge will be more accurate.

58,285

If you go to the oil pump pick-up I would replace the oil pump with a high volume pump since you are there. Before doing any of this I would check the oil pressure with a mechanical gauge to help in determining the condition of the engine.

17,830

After replacing the o ring and it still taps try adding some Lucas Engine Oil Stabilizer to oil. Had a friend that had a tap in his engine added stabilizer and let idle in about 45 minutes the tap was gone. Not saying it is going to work for you but it is worth a try.

Your Answer

Add photo

Related Questions

  • Loud knocking noise 5.3 55 answers

    I have a loud knocking noise coming from the engine . At first I thought it was comin from the top but when i get under it it's alot louder sounds like its comin from the oil pan. I had the transmissi...

    2005 Chevrolet Silverado 1500 Z71 Crew Cab 4WD

    -

    Maintenance & Repair

  • I have a 2009 chev silverado 5.3 litre knocking with 200,000KM on it. 1 answer

    Please help, I am a female with a 2009 chev 5.3 litre, with 200,000 kilometers on it. It started knocking in lower part of the engine a bit ago. It only does it when it is warmed up. and it is a kno...

    2009 Chevrolet Silverado 1500 LS Crew Cab

    -

    Maintenance & Repair

  • Is it a bend value 5.3 Chevy 14 answers

    I have no oil pressure and there's a knock. I've taken off the value cover to check the push rods and there's a rocker that has about a 1/2 space between the rod and rocker but the rod still moves...

    Chevrolet Silverado 1500

    -

    Maintenance & Repair

  • 99 chevy 5.3 have put new pump and pressuer sencer still no oil presure 3 answers

    1999 Chevrolet Silverado 1500 LS 4WD Standard Cab SB

    -

    Maintenance & Repair

  • Oil pressure light an loud engine knocking 2 answers

    My 2000 Chevy Tahoe has a loud knocking sound and the oil pressure light comes on

    2000 Chevrolet Tahoe LS

    -

    Maintenance & Repair

Silverado 1500

Looking for a Used Silverado 1500 in your area?

CarGurus has 159,904 nationwide Silverado 1500 listings starting at $1,995.

ZIP:

Search Chevrolet Silverado 1500 Questions

Chevrolet Silverado 1500 Experts

#1 John Carson
John Carson
Reputation 1,910
#2 Rowefast
Rowefast
Reputation 1,670
#3 Silverado_owner_2006
Silverado_owner_2006
Reputation 1,590
View All

Related Models For Sale

Used GMC Sierra 1500
875 Great Deals out of 64,409 listings starting at $1,500
Used Ford F-150
2,410 Great Deals out of 209,424 listings starting at $895
Used Chevrolet Silverado 2500HD
326 Great Deals out of 26,371 listings starting at $2,500
Used Toyota Tundra
511 Great Deals out of 32,114 listings starting at $2,995
Used Toyota Tacoma
527 Great Deals out of 37,484 listings starting at $2,950
Used Chevrolet Tahoe
601 Great Deals out of 27,562 listings starting at $600
Used Ram 1500
920 Great Deals out of 114,271 listings starting at $6,500
Used Chevrolet Colorado
220 Great Deals out of 22,251 listings starting at $2,000
Used Chevrolet Camaro
131 Great Deals out of 35,283 listings starting at $1,995
Used Ford F-250 Super Duty
379 Great Deals out of 47,659 listings starting at $400
Used Ford Mustang
320 Great Deals out of 45,523 listings starting at $2,000
Used Dodge Charger
249 Great Deals out of 27,238 listings starting at $1,997

Used Cars For Sale

2017 Chevrolet Silverado 1500 For Sale
42 Great Deals out of 104,136 listings starting at $18,779
2016 Chevrolet Silverado 1500 For Sale
182 Great Deals out of 6,776 listings starting at $17,025
2015 Chevrolet Silverado 1500 For Sale
202 Great Deals out of 7,433 listings starting at $15,888
2014 Chevrolet Silverado 1500 For Sale
330 Great Deals out of 10,791 listings starting at $10,900
2013 Chevrolet Silverado 1500 For Sale
194 Great Deals out of 5,470 listings starting at $7,900