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Username Post: Ticking 6.0        (Topic#359755)
gchemist 
Member #271 Senior Chevytalk Moderator
Posts: 25043
gchemist
Loc: Austin, TX 78748
Reg: 05-09-00
02-09-20 08:44 AM - Post#2786163    

A friend brought me an '04 Denali 6.0 with 233k miles. The right side has a ticking noise. I assume it's a rocker arm. Worse case, a bad lifter. No engine codes are present. Are these motors known to get loose rocker arms? Is zero lash the setting? After it warms up, the noise practically goes away. However, a faint tick can be heard.

'83 Silverardo XST - ZZ4 powered
'95 Jimmy SLT (Bought @131,814)
'96 GMC Jimmy LS Ret. @236651 miles


 
wagonman100 
Super Senior Member
Posts: 14365
wagonman100
Loc: Baltimore, MD
Reg: 11-27-04
02-14-20 06:46 PM - Post#2786534    
    In response to gchemist

It is probably a lifter. The later models with cylinder deactivation had lifter problems.

Jay
Friends don’t let friends drive Fords.

1999 Silverado Z71 4X4 extra-cab short bed
1983 Malibu Fauxmad - tubbed
1978 El Camino Kustomized
1972 Monte Carlo
1957 210 handyman wagon
1957 Nomad sport wagon
1957 Cameo Carrier


 
gchemist 
Member #271 Senior Chevytalk Moderator
Posts: 25043
gchemist
Loc: Austin, TX 78748
Reg: 05-09-00
02-17-20 01:40 PM - Post#2786736    
    In response to wagonman100

Would this 6.0 have deactivation? Too early is it not?

'83 Silverardo XST - ZZ4 powered
'95 Jimmy SLT (Bought @131,814)
'96 GMC Jimmy LS Ret. @236651 miles


 
jktucker92 
Silver Supporting Member
Posts: 341
jktucker92
Loc: West Richland, WA
Reg: 02-05-17
02-17-20 02:08 PM - Post#2786739    
    In response to gchemist

Yes, the Active Fuel Management wasn't available in the 6.0L until 2007. It was available in some GMC and trailblazer 5.3L in 2005.
As for your ticking noise, it could be a lifter. I had a '03 5.3L that developed a ticking noise at 175,000 and it was a lifter. What I discovered is that some of the lifter holders in '03 and '04 warped over time, and the lifter was being held in at a slight angle, which caused the lifter to rub the cam and damage the cam. I caught it pretty early, and just replaced the lifter and had the cam reground. I also replaced all the lifter holders to ensure it wouldn't happen again. It ran great for another 25,000 miles and then I sold it. In order to confirm that, if you can isolate which lifter you think is causing the problem, you can remove a rocker and see if the noise goes away. If it does, you know what the problem is. Unfortunately, you have to remove the head in order to remove a lifter. It is possible to remove a cam without removing the head, but I've never tried it.
The other possibility is piston slap. These engines are notorious for piston slap, which I'm told is harmless, but even my '02 Tahoe had a distinct ticking noise when cold when it was new.



 
gchemist 
Member #271 Senior Chevytalk Moderator
Posts: 25043
gchemist
Loc: Austin, TX 78748
Reg: 05-09-00
02-20-20 05:30 AM - Post#2786913    
    In response to jktucker92

Where's the ticking lifter noise heard? Deep inside the block? Or up high on the valve cover. From hearing the engine run, I think it's the #2 or #4 area making the tick. I'll have to use my mechanic stethoscope to get a better idea. Yup, removing the head is no joke to fix a lifter.

'83 Silverardo XST - ZZ4 powered
'95 Jimmy SLT (Bought @131,814)
'96 GMC Jimmy LS Ret. @236651 miles


 
jktucker92 
Silver Supporting Member
Posts: 341
jktucker92
Loc: West Richland, WA
Reg: 02-05-17
02-20-20 11:15 AM - Post#2786935    
    In response to gchemist

As I recall, the ticking lifter I heard sounds like it's coming from the top of the engine, but not the valve cover area. If the cam is badly worn, you'll hear a ticking noise from the valve cover area because a small gap has developed between the pushrod and the rocker arm. In my case, there was just a scar on the cam and a matching one on the lifter. Below is a link to a Youtube video with damage to a lifter that's a little more severe than mine was.

https://www.youtube.com/watch?v=g8rQdqR00es




 
64ss409 
Senior Member
Posts: 923

Loc: Montana
Reg: 12-04-02
02-21-20 05:43 PM - Post#2787022    
    In response to gchemist

I have had ticks that I thought were valve train, but turned out to be a cracked exhaust manifold. Yours may not be, but I thought I would mention it.
Ron

1964 SS 409/340 4 spd, bought new Oct '63 from Ken Boggs Chevrolet, Geraldine, Montana


 
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