Last post on Apr 20, 2013 at 12:04 PM
You are in the Chevrolet Avalanche
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Chevrolet Avalanche, Engine, Truck
#13 of 63 Re: Piston Slap [andromador]
Jan 25, 2008 (1:27 pm)
I had a 2001 silverado Z71 on a lease, I had this vhichle 61 mo. on a 60 mo. lease. I loved this truck, but at 9,200 mi I got a ticking noise in the engine, well over and over I went to the dealership, and Finally they admitted this was the "piston slap" that GM was getting a bad rap over. I did not know where to turn because the dealership was saying ther is NOTHING we can do to fix it. I got a tip from an attorney friend of mine, and he said go to the BBB and file a complaint. Well I took his advice and sure enough! Chevrolet called me 2 days later. The lady flat out asked me what I wanted them to do, basically name it. I told her I was a huge fan of Chevrolet and liked my truck, just back up what your dealership is saying "it is not a problem to worry with." She said no problem, we will extend warranty FULL WARRANTY up to 115,000 mi or 72 mo. Well I was ok with that.. So now my lease on that vehicle was fullfilled and I bought a New 2007 Chevy Avalanche. I purchased this Oct. 2006. I now have 10,200 mi and Guess what!!! It started ticking! I just picked it up from the dealer 3 hr ago and they said "WE CAN"T FIX IT"!!!! If you have piston slap I would file W/ BBB.com You will get results!!! Looks like I will be doing it again too...
#14 of 63 Anyone Else????
Jan 25, 2008 (6:13 pm)
Does anyone else have a cold start ticking noise from the 5.3L AV engine, and if so what is your dealer or mechanic saying about it? I need help.... My dealer says it is because Chevrolet has hydralic lifters, and when the oil is cold they tend to ping?? All replys WELCOME.........
#15 of 63 Re: Anyone Else???? [sparky75]
Jan 31, 2008 (10:49 pm)
sparky75 and andromador......I have a cold engine ticking but it's not piston slap. Before you you are convinced by a dealer that it is piston slap, go to www.pistonslap.com and listen to the audio sample. Piston slap can occur in one or more of the cylinders depending on your vehicle. My '07 does NOT sound like that. And, if you have an '07, it is very likely that you do NOT have piston slap since GM changed the method for matching pistons to cylinders (by size & tolerances) for the '07 model year. Incidently, the link I referred to will give you a description and reason behind piston slap. Dealers often use piston slap as an excuse since the problem is widely known.
The tap I have, sparky75, is related to the hydraulic lifters however not as the dealer explained to you. My tap is NOT at every cold engine start. It is only on cold starts after one of the valves for 1, 4, 6 or 7 cylinders (they are the 4 cylinders that shut down in the V4 mode) while one the high-point of the cam. Then, during the cool down period, the hydraulic pressure bleeds off. Then, when started cold, there is valve lash for over 1 minute (sometimes for 2 minutes) until the hydraulic pressure is sufficient to build up the lifter. The resulting tap is the rocker arm slamming on the valve top as a single, metal-to-metal tapping sound.
I still have no resolution with my dealer, but hadn't thought of the BBB as an avenue. Might try that one.
#16 of 63 Re: Chevy engine noise help [mrjwalkr]
Apr 06, 2008 (3:24 pm)
what was your problem/cure.......my 8.1 started this last night and I noticed some play in the serpentine belt tensioner,,,but I know gm is famous for alternator noise....85k miles
#17 of 63 Re: Chevy engine noise help [sp7128]
Apr 22, 2008 (12:46 pm)
I own a 2004 Avalanch, 87K , sqeaking, :o( I have changed my tensoiner and belt, last week, the next day the sqeeking is back. . same issues you guys are having, have you fiqured this one out. please advise
#18 of 63 Re: Chevy engine noise help [alanm311]
May 08, 2008 (5:01 pm)
Not sure if this helps any, but did you check the lower belt and tensioner? I just changed the belts (yes, the hidden one on the bottom and behind the serpentine belt) on my 04'-5.3 and had a problem with the bottom tensioner. I didn't find it until I went to replace the serpentine.
Hope it helps,
#19 of 63 Re: Engine Dying [heath2002]
Dec 17, 2008 (2:56 pm)
I have an 02' 2500 that does the same thing. Engine dies going down the road, pull over wait 10 seconds engine restarts. Will also crank and crank sometimes when starting and will not start. Wait 10 seconds and it will fire right up. Can anyone help me with this. Have taken it to repair shop and they cannot figure it out.
#20 of 63 130,000 miles taping noise
May 11, 2009 (8:12 am)
Just left the dealership and they are telling me it is a bad lift spring or the cam shaft going bad that the engine would need to be replaced. Said they can put a used engine in it with 62,000 for the same price as to tear down and replace cam and lifters. Anybody else with similar problems? Also just had the oil changed and now the taping noise has stoped.
#21 of 63 Re: Chevy engine noise help [mrjwalkr]
May 11, 2009 (8:18 am)
I have 130,000 and it is happening as you discribed. The dealership say's it is not the pulley or belt it is intenal.
Anybody else with same problem?