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

71,255

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.

71,255

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.

18,790

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

  • 5.3 engine loud tick/ knock 3 answers

    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 bee...

    2012 Chevrolet Silverado 1500

    -

    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

  • 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

  • 5.3 2012 engine 1 answer

    I have a 2009 Chevy Silverado lifter collapsed so I bought another engine a 2012 supposed to fresh build put it in truck month later oil pressure dropped done everything oil pump pick up tube filt...

    2012 Chevrolet Silverado 1500 LS Crew Cab 4WD

    -

    Maintenance & Repair

  • 2000 Chevy Silverado 5.3 liter 5 answers

    My truck has a tick tick tick tick when warming up and then goes away. What might it be?

    2000 Chevrolet Silverado 1500 Ext Cab Short Bed 2WD

    -

    Maintenance & Repair

Silverado 1500

Looking for a Used Silverado 1500 in your area?

CarGurus has 6,684 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 2,330
#2 Rowefast
Rowefast
Reputation 1,920
#3 Silverado_owner_2006
Silverado_owner_2006
Reputation 1,640
View All

Related Models For Sale

Used GMC Sierra 1500
158 Great Deals out of 7,843 listings starting at $3,333
Used Ford F-150
303 Great Deals out of 8,874 listings starting at $1,600
Used Chevrolet Silverado 2500HD
8 Great Deals out of 836 listings starting at $4,949
Used Toyota Tundra
10 Great Deals out of 714 listings starting at $4,999
Used Toyota Tacoma
15 Great Deals out of 826 listings starting at $10,500
Used Chevrolet Tahoe
494 listings starting at $4,995
Used Ram 1500
358 Great Deals out of 23,034 listings starting at $710
Used Chevrolet Colorado
12 Great Deals out of 1,330 listings starting at $3,500
Used Chevrolet Camaro
848 listings starting at $8,995
Used Ford F-250 Super Duty
16 Great Deals out of 712 listings starting at $4,500
Used Ford Mustang
4 Great Deals out of 1,358 listings starting at $5,980
Used GMC Sierra 2500HD
15 Great Deals out of 1,015 listings starting at $6,490

Used Cars For Sale

2017 Chevrolet Silverado 1500 For Sale
10 Great Deals out of 4,976 listings starting at $24,715
2016 Chevrolet Silverado 1500 For Sale
14 Great Deals out of 158 listings starting at $27,995
2015 Chevrolet Silverado 1500 For Sale
23 Great Deals out of 386 listings starting at $19,900
2014 Chevrolet Silverado 1500 For Sale
21 Great Deals out of 356 listings starting at $16,999
2013 Chevrolet Silverado 1500 For Sale
15 Great Deals out of 199 listings starting at $12,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.