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Do you tick/knock part 2

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Do you tick/knock part 2  

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  • 1 month later...
Shaners Senior Enthusiast

Shaners

Posted
Posted

The cold start knock is definatly there in my 6.0L...  I don't care for it, but I'm not too concerned.

 

As for the constant tick, I have heard it in my motor at times too.  I almost believe the "carbon buildup" theory that GM is using, because after running the truck hard (ie towing) it goes away for awhile.

samuriarte Enthusiast

samuriarte

Posted
Posted

Mine started cold start noise at about 9000-1000 miles. It has a warm tick that sounds liek lifters sometimes. GM has opened a case for the cold noise, but Ihave to take it to the dealer to be diagnosed(per my CAC-chev customer assistance, letter).

CapnDean Enthusiast

CapnDean

Posted
Posted

My 2001 4.8 occasionally has the cold start tap.

 

23,000 miles.

 

The tap goes away after about 10 seconds though.  Not worried...love the motor, love the truck, love the mileage!

 

CapnDean

  • 3 years later...
Halen5150 Enthusiast

Halen5150

Posted
Posted

Mine ticks ALL the time...and it's really loud. Took it to the dealership to have it looked at, but they wanted to keep it overnight, even if I brought it to them at 7:00 that morning. Eff that. I've been told it was a lifter tick. I bought the truck at 50K miles and ran quaker state 10w-30 every 3-4K until 95K when I switched to Mobil-1 10w-30. I've been using the AC Delco PF59 from day one. I've also got the cold start knock. 107K miles and still runnin' strong.

Z71GUY Enthusiast

Z71GUY

Posted
Posted

Honestly I think I've only heard this "knock" about 5-6 times in the life of the truck....and when I did hear it, it lasted maybe 10 seconds or so. Seemed to happen the most when the truck sat for more than 1 - 2 weeks without being driven.

 

I run my truck pretty hard and use Mobil 1 5-30. Its a 99 w/ 5.3 & 59,000 miles.

MS3DALE Senior Enthusiast

MS3DALE

Posted
Posted

No knock on my '04 with 12,000 miles on it,I run Mobil1 5W-30 and an AC-Delco filter.

Now my '99 I had did it from almost day one,I ran it 90,000 miles and never had any problems with it,It never used or burned any oil and gas mileage wasn't affected.

Cheekster96 Enthusiast

Cheekster96

Posted
Posted

2003 Sierra with the 4.8L and 65K miles and still ticks when i start it up. maybe for just a minute. i dont think it is piston slap but rather the upper valve train making some noise...rockers possibly.

i use castrol syn blend. i might go full synthetic next time.

Lee

Rylandnc Enthusiast

Rylandnc

Posted
Posted

2001 Sierra with the 6.0 with 53k miles here. It has the start up knock for about 15-20 seconds. I bought it used two years ago with 29k miles and it did it then too. I've been running Mobil 1 since I've had it. Other than that and rough idling when the throttle body needs cleaning, it runs great.

RyanZ71 Senior Enthusiast

RyanZ71

Posted
Posted

1999 Silverado 5.3L 98,000 miles = Standard Valvoline 5W30 Oil =slight knock on cold start up, less noticable or not existant when running Mobil-1 5W30 Full Synthetic, (useing AC/Delco Filter)

 

2001 Sierra 4.8L 84,000 miles= ticking Running Valvoline 5W30 standard oil. (Ticks at idle sometimes, sometimes doesn't, always ticks at cold start up)

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