'06 Monte SS DOD/AFM problem
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'06 Monte SS DOD/AFM problem Hi folks, about 3 weeks ago I bought a mint '06 SS with the 5.3 LS4 and 87k miles. The only mod so far is Hooker Aero Chamber mufflers. Since day one the engine has made a noticeable clicking sound when in 4 cylinder mode (only at low speed...can't hear it on the freeway). Then today on the freeway I noticed a large puff of blue smoke coming out of the exhaust when the engine switches from 4 cyl to 8 cyl mode. This only happens when on the gas a little, not while coasting. The blue smoke goes away after a second or two. Are the noise and smoke related and what exactly is the problem here? I'd like some input before I take it back to the dealer.
The ticking is usuallu the timing chain. It doesn't mean there s a problen its just audible. Blue smoke is usually burnt oil. Could be a bad valve or lifter. Are you burning oil?
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It's like the engine has to be in 4 cyl mode for a while for the smoke to appear. If it's only been in 4 cyl mode for ~30 seconds on the freeway, the smoke does NOT appear when switching back to 8.
There's also that loud clicking sound that I hear in 4 cylinder mode, but I only hear it at low speeds with the windows down. I'm sure the smoke and clicking/ticking sound from the valve train are related, but not sure how.
I had been complaining abt an audible "chatter" at low speeds when driving through the city in 4-cyl mode. The noise would stop as soon as I slowed to <25mph, the threahold at which DoD would kick it back into 8-cyl mode. Never figured out what it was, but was told it was possibly bad DoD lifters. I know that when I selected a non-DoD tune w the Diablo, there was no more noise.
I have a Diablo for sale, cheap, lol.
I have a Diablo for sale, cheap, lol.
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Hey Chris, glad nobody was hurt and you are probably correct about time to move on.
You asked, "How does the timing chain relate to the DoD". Well it is not really the timing chain as much as it is the timing chain deflectors (guides), they are made of plastic/nylon and when your car is new the chain actually rubs against them. They have been documented as breaking and/or falling off into the oil pan in as early as 10.000 miles. Once this happens you get the famous DoD timing chain chatter as there is nothing to take up the slack which is created during DoD mode (not enough constant pressure on all the lifters)
Any way good luck in the hunt for new wheels!
You asked, "How does the timing chain relate to the DoD". Well it is not really the timing chain as much as it is the timing chain deflectors (guides), they are made of plastic/nylon and when your car is new the chain actually rubs against them. They have been documented as breaking and/or falling off into the oil pan in as early as 10.000 miles. Once this happens you get the famous DoD timing chain chatter as there is nothing to take up the slack which is created during DoD mode (not enough constant pressure on all the lifters)
Any way good luck in the hunt for new wheels!
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You asked, "How does the timing chain relate to the DoD". Well it is not really the timing chain as much as it is the timing chain deflectors (guides), they are made of plastic/nylon and when your car is new the chain actually rubs against them. They have been documented as breaking and/or falling off into the oil pan in as early as 10.000 miles. Once this happens you get the famous DoD timing chain chatter as there is nothing to take up the slack which is created during DoD mode (not enough constant pressure on all the lifters)
The other sound is a very loud clicking sound that I hear when in 4 cylinder mode at low speeds. I don't hear it in 4 cylinder mode on the freeway, probably because of all the other noise.
The loud clicking in 4 cylinder mode is probably the DoD lifters from what I'm told. The softer ticking while at idle is what I'm confused about.
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Just to clarify, the engine makes two different sounds. The first is a slight "tick" at idle. I hear it whether the engine is cold or warm. It's not a huge deal but definitely annoying.
Your car is an 06 so you probably have the EATON lifters and yes the Delphi`s are somewhat better, there has been a few updates to the Delphi`s. There is one thing you can check for the idle (cold/warm tick) http://www.gmls4.com/index.php/topic,2098.0.html
The other sound is a very loud clicking sound that I hear when in 4 cylinder mode at low speeds. Keep your shift lever in the 3 position at any speeds below 50 mph, this way your Chev 5.3 will not go into DoD mode. I don't hear it in 4 cylinder mode on the freeway, probably because of all the other noise.
The loud clicking in 4 cylinder mode is probably the DoD lifters from what I'm told.This is a possibility but you can eliminate the chatter if you simply put the gear selector in 3rd under 50 mph and if your chatter is no longer there it is the timing chain chatter you were hearing. The softer ticking while at idle is what I'm confused about.
Your car is an 06 so you probably have the EATON lifters and yes the Delphi`s are somewhat better, there has been a few updates to the Delphi`s. There is one thing you can check for the idle (cold/warm tick) http://www.gmls4.com/index.php/topic,2098.0.html
The other sound is a very loud clicking sound that I hear when in 4 cylinder mode at low speeds. Keep your shift lever in the 3 position at any speeds below 50 mph, this way your Chev 5.3 will not go into DoD mode. I don't hear it in 4 cylinder mode on the freeway, probably because of all the other noise.
The loud clicking in 4 cylinder mode is probably the DoD lifters from what I'm told.This is a possibility but you can eliminate the chatter if you simply put the gear selector in 3rd under 50 mph and if your chatter is no longer there it is the timing chain chatter you were hearing. The softer ticking while at idle is what I'm confused about.
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From: CT
DOD 4 cyl. mode? what's that?? 
hahaha... disabled that **** 1 month after I bought my car new in 2005... no issues at all here, no burning oil, etc etc....
hahaha... disabled that **** 1 month after I bought my car new in 2005... no issues at all here, no burning oil, etc etc....
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06MonteSS / DiabLew Tune
2014 Camaro 2SS/RS - LS3, 6-speed manual, short-throw performance shifter, NPP dual-mode performance exhaust, 1LE front splitter, ZL1 rockers, Z28 Rear Spoiler, all paint-matched Red Rock Metallic, BMR strut tower brace, Cold Air Inductions cold air intake, Apex Motorsports, Inc. catch-can, Custom DiabLew Tune
www.diablewtune.com -- www.diablocustomtune.com -- www.diablocustomtunegm.com
06MonteSS / DiabLew Tune
2014 Camaro 2SS/RS - LS3, 6-speed manual, short-throw performance shifter, NPP dual-mode performance exhaust, 1LE front splitter, ZL1 rockers, Z28 Rear Spoiler, all paint-matched Red Rock Metallic, BMR strut tower brace, Cold Air Inductions cold air intake, Apex Motorsports, Inc. catch-can, Custom DiabLew Tune
www.diablewtune.com -- www.diablocustomtune.com -- www.diablocustomtunegm.com
