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

37,975

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.

37,975

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.

16,850

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 53 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

  • Engine knock 2 answers

    Changed the oil in my 2006 Chevy ext now there is a loud knock coming from lower engine could it be used wrong oil filter

    2006 Chevrolet Silverado 1500 Base Extended Cab 4WD Short Bed

    -

    Maintenance & Repair

Silverado 1500

Looking for a Used Silverado 1500 in your area?

CarGurus has 4,797 nationwide Silverado 1500 listings starting at $2,339.

Postal Code:

Search Chevrolet Silverado 1500 Questions

Chevrolet Silverado 1500 Experts

#1 John Carson
John Carson
Reputation 1,660
#2 Silverado_owner_2006
Silverado_owner_2006
Reputation 1,440
#3 tenspeed
tenspeed
Reputation 1,350
View All

Related Models For Sale

Used GMC Sierra 1500
174 Great Deals out of 5,652 listings starting at $2,900
Used Ford F-150
461 Great Deals out of 7,088 listings starting at $426
Used Chevrolet Silverado 2500HD
16 Great Deals out of 611 listings starting at $7,800
Used Toyota Tundra
28 Great Deals out of 671 listings starting at $6,319
Used Chevrolet Tahoe
337 listings starting at $6,477
Used Toyota Tacoma
34 Great Deals out of 598 listings starting at $3,495
Used Ram 1500
324 Great Deals out of 15,174 listings starting at $9,990
Used Chevrolet Colorado
12 Great Deals out of 341 listings starting at $3,500
Used Ford F-250 Super Duty
26 Great Deals out of 423 listings starting at $6,675
Used Chevrolet Camaro
3 Great Deals out of 895 listings starting at $10,995
Used GMC Sierra 2500HD
24 Great Deals out of 761 listings starting at $5,980

Used Cars For Sale

2017 Chevrolet Silverado 1500 For Sale
2,872 listings starting at $29,190
2016 Chevrolet Silverado 1500 For Sale
8 Great Deals out of 454 listings starting at $27,497
2015 Chevrolet Silverado 1500 For Sale
16 Great Deals out of 271 listings starting at $19,422
2014 Chevrolet Silverado 1500 For Sale
26 Great Deals out of 363 listings starting at $14,695
2013 Chevrolet Silverado 1500 For Sale
21 Great Deals out of 216 listings starting at $14,000