Manifold/header/muffler/tail Pipe Problems of Chevrolet Silverado 1500 - part 1

My truck had an afm collapsed lifter failure. It occurred under a hard acceleration event to change lanes. The dealer replaced the lifter, returning the vehicle to me. I got down the road, tested it under hard acceleration and it happened again! this time there was a lot of internal engine noise, really loud. I asked the dealer if they ntested it under a hard acceleration; they did not. They replaced the #6 piston and the valves associated with the #6 piston. All work performed was done on #6, even the initial collapsed lifter. I picked it up again and again a hard acceleration produced misfires! I had it towed it back to the dealer and asked them if they had tested it with hard acceleration. The response was @ 3300 rpm. I told the service writer that, if you do not test it under hard acceleration you will not even have it misfire! he redid the test and voila, he can see it now! technical resources told them to replace vlom, or "valve lifter oil manifold". I got it back and it does work, more or less. A hard acceleration will produce uneven acceleration but without the previous issues. I am working for now. . Read more...

See all problems of the 2015 Chevrolet Silverado 1500 🔎.

The cabin of the vehicle fills with carbon monoxide. This is known because a 4 gas monitor in the vehicle read carbon monoxide levels in excess of 400 ppm. The source of the leak after being taken to the dealership was found to be a broken bolt in the exhaust manifold. The parts only estimate was $1,700 with approximately 9 labor hours. Online research found numerous complaints. Failure to correct the condition may lead to drivers fainting while driving and cause brain injury to a child or infant. A leak in the exhaust before reaching the catalytic converters also results in possibly excessive untreated emissions. The exhaust leak may or may not pose a fire hazard.

Exhaust manifold bolts coming off heads are falling off pause an exhaust leak and giving me headaches. From the looks of it has been off for quite some time I'm just now noticing it.

See all problems of the 2005 Chevrolet Silverado 1500 🔎.

Hello just wanted share this about my 2015 Chevrolet silverado my started making a strange knock sound sqealing noise on engine so took it to Chevrolet dealer to have it ckecked out they called me and told that it had exhaust manifold bolts broke off in engine block it will cost $4000 dollars to repair I feel that is a gm manufacture issue even my extended warranty will not cover this problem I feel that shouldn't pay someone needs to investigate why these bolts broke off.

On the exhaust manifold, the bolts break off at the head of the bolt whether the vehicle is in motion or not. Sometimes the bolts break off flush with the manifold and sometimes they break off flush with the head. I personally have had 6 out of the 12 bolts on my engine break off. The fix is to drill out the remaining piece of bolt (threaded part) and then use a bolt extractor to remove the remaining piece of bolt that is still seized in the head. Well, the most common bolt to break off out of the 12 manifold bolts is the one directly in front of the drivers position. Unfortunately, that is the hardest bolt to remove because of it's location. Most shops I've been to say that the ticking sound that you hear once this bolt breaks off is a loose lifter. That is incorrect! the ticking sound is actually an exhaust leak stemming from, most likely, the broken bolt directly in front of the driver. The sound goes away once the engine warms up because of the metal expanding with the temperature increase. I had 3 mechanics under the hood of my truck for almost 9 hours trying to remove the 6 bolts that had broken on my engine. They had broken every drill bit in their shop (the shop is a 14 lift, 16 bay shop) that could possibly be used to drill a hole for the extractor just trying to get a hole for the extractor to fit in and then the bolt extractor broke off in the last bolt which happened to be the one directly in front of the driver. They had the cross member removed and were preparing to drop my engine when I told them to just stop there. I couldn't afford any more of a fix since I was $1,800 deep into this one day at the shop as it was. This is such a common problem that there are aftermarket contraptions to bolt on and cinch the manifold down with another bolt. That isn't the right thing to do. There should be a recall and I should get reimbursed!.

See all problems of the 2000 Chevrolet Silverado 1500 🔎.

Exhaust manifold bolts broke off and is now leaking exhaust fumes in side the truck also emissions is effected for osha or emission test this is a problem of safety I have seen alot of people with same problem and yet no recall ,it is a problem in all phases of operation of the truck only has 49,000 miles don't have a photo but surely you are really familiar with this problem usually its the front and rear bolts cause is inferior materials and workmanship also can cause catalytic converter failure the cost of this repair should be on gm as it can run 1000s to fix.

See all problems of the 2006 Chevrolet Silverado 1500 🔎.

I have a broken exhaust manifold bolt. It is a known problem and is impacting my smog certification and safety.

I am the original owner of this very well maintained silverado. At just 100000 miles I noticed multiple exhaust manifold bolts broken, I had noticed a ticking sound for at least 10000 miles but could not locate the sound, as it turns out it was the broken exhaust bolts. These bolts break off at varying lengths including below flush which is extremely costly to have replaced. After a brief internet search I have realized this is a major issue with a majority of these vehicles. This is definitely an epa concern being the raw gasses are flowing out of the vehicle bypassing the catalytic converter and by not allowing these vehicles to pass regulatory smog certifications. This defect could also be considered a safety concern with the potential for the exhaust gasses to get into the passenger compartment. I truly hope that you can investigate these defective bolts and at the very least get Chevrolet to acknowledge the issue and help with a portion of the cost to repair.

See all problems of the 2001 Chevrolet Silverado 1500 🔎.

I have an exhaust leak, due to a broken exhaust manifold bolt. Gm used the wrong bolts on my 5. 3liter engine. My chevy dealer says it's going to cost me $1200 to $1400 to repair my engine. My truck only has 87000 miles on it.

See all problems of the 2002 Chevrolet Silverado 1500 🔎.

Like so many others, I started to hear a ticking at startup and sometime an exhaust smell in the cab. I found 2 exhaust manifold bolts broken on each side. It can get bad enough to open a window at times. Dealer said it's a common problem. There should be a recall on a emissions and safety issue. I take very good care of my truck and this should not happen. I see it has been a problem since 1999. What can we do to get reimbursed for the cost of repair? if I have an independent repair would gm ever cover it or does it have to be done by a high cost dealership? they got vw for emissions what about gm?.

The contact owns a 2004 Chevrolet Silverado 1500. The contact stated that the vehicle emitted a strong burning odor. The vehicle was taken to an independent mechanic who performed an inspection that located the engine valve failed and caused the engine oil to leak on the manifold. The vehicle was not repaired. The dealer stated that the vehicle was not included in NHTSA campaign number: 15v701000 (engine and engine cooling). The manufacturer was not notified. The failure mileage was 180,000.

See all problems of the 2004 Chevrolet Silverado 1500 🔎.

4 broken exhaust manifold bolts.

The exhaust manifold bolts broke off causing exhaust leak. It will cause engine light to come on,very expensive repair. This is not from normal wear and tear defective material in the bolts. There should be a recall on this.

See all problems of the 2008 Chevrolet Silverado 1500 🔎.

3 exhaust manifold bolts broke off manifold.

Several of the exhaust manifold bolts have snapped/sheared causing exhaust leaks between the exhaust manifold and exhaust port on the cylinder head. I'm learning that this is a common issue that has gone unaddressed by the manufacturer, but is clearly an emissions and functionality issue. Please help in holding the manufacturer accountable for this apparent mechanical defect. As of now, they offer no assistance in repairing the issue.

See all problems of the 2003 Chevrolet Silverado 1500 🔎.

Broken/loose bolts on exhaust manifold causing tapping and exhaust and emissions leak.

Started to hear engine exhaust getting loud, started to look for exhaust leak and found that # 8 and #7 piston leaking at exhaust manifold due to broken bolts and then engine error code O2 sensor bank 1 will not turn off, can not get truck to pass inspection have found out others truck owners have same problem.

Noticed that the front left exhaust manifold bolt broke off; no one has ever touched this part so the bolt was installed as original. Searching the internet I found this is a major -- and known -- problem affecting millions of these engines. The patter starts with a bolt or two then culminates with more broken bolts, an exhaust leak, overheated catalytic converter, damaged parts and potential fires.

See all problems of the 1999 Chevrolet Silverado 1500 🔎.

The contact owns 2003 Chevrolet Silverado 1500 hd. The contact stated that the vehicle was making a loud noise. After inspecting the vehicle he noticed that four of the exhaust header manifold bolt heads were missing. The vehicle was taken to a dealer. The technician diagnose that the exhaust manifolds and bolts needed to be replaced. The vehicle was not repaired. The manufacturer has been notified of the failure. The approximate failure mileage was 108,000.

I went to start my truck in morning to get to work and this loud ticking noise from under the hood, I shut engine off panicking and opened the hood. Went back and started truck again and looked around, I didn't see anything but heard it. Checked oil since it sounded like the lifters but had plenty of oil. Stopped on way to work and got some slick50 supercharge engine treatment. At breaktime checked oil again and added the slick50, started engine and had lifter noise again but quieted down within 30 secs. At the end of my work day started it up and again lifter noise but quieted down again within 30 sec. Broken exhaust manifold bolts were found.

The manifold bolts have broken off into the head of the engine. Resulting in failure of seal to head from the exhaust manifold. In turn, has caused the catalytic converter to fail and now the vehicle requires extensive work to pass emissions testing in California. It only takes one bolt to break on the exhaust manifold to cause this issue. The bolts are obviously the weak link. The engineering design needs to be modified immediately. It is not listed as a maintenance item in any gm owners manual. Why should the consumer be responsible for an item that causes catastrophic failure to the emission system, which is a mandated and governed by the federal government and fee'd accordingly via state and county guidelines.

See all problems of the 2007 Chevrolet Silverado 1500 🔎.

Truck has an exhaust leak at manifolds. 4 bolts have broken off of the manifold. My mechanic said this is very common with this truck and could cost up to and over $1,000. 00 to fix. Check engine light is on so unless I fix it I can't go to state inspection. Also the brake lines are corroded and also need to be replaced. These are all defects not maintenance issues. . Read more...

Went to change exhaust manifold and gasket when number one cylinder manifold bolt broke off under minimal pressure. Bolt broke off flush/recessed to gasket surface of cylinder head. Inspected bolt and came to the conclusion that the bolt was fractured when it was installed during vehicle assembly. Spoke with dealership and representative pulled up VIN history in computer. History showed an error with number one cylinder during vehicle assembly and dealer service representative stated "that motor should have never made it out of the assembly plant. " no help from dealership to remove broken bolt so exhaust leak can be repaired. Dealership also noticed that the number one spark plug on the same cylinder was sticking out further than the other plugs. Come to find out that the spark plug hole had not been threaded all the way into the cylinder. No help from gm on that one either. Had to buy a tap and finish threading the hole myself at home. Researched broken bolt extraction for silverado exhaust manifold and have found that this is an epidemic and there are multiple videos on youtube about this issue.

Exhaust manifold bolts breaking leaving studs in the heads, heating up engine compartments, releases carbon monoxide, affects O2 sensor and catalytic converter. Will not pass emissions in some states. Gm not standing behind this 1999-2008 issue. It is a safety issue and is expensive to fix. Gm mechanics denying any such issues. Please check- in to this. Our whole fleet and our personal trucks affected by this.

See all problems of the 1998 Chevrolet Silverado 1500 🔎.

Exhaust manifold bolts breaking off in to the head this is causing exhaust leaks in the engine compartment, noise, carbon monoxide in the engine and cab areas, added heat in the engine compartment, and will not meet the emission standards of some states. Very expensive to repair and gm is not standing behind this issue in the truck with v-8 engines years 1999-2008. Almost all have this issue. Safety hazard. Please look at this. Also, causing problems with the catalytic converter and O2 sensor. Make them step up to the plate.

Exhaust manifold bolts breaking off leaving studs in the heads this is very common problem. Heating up engine compartment, releases carbon monoxide,messes up the O2 sensor and catalytic converter. Cannot pass emission standards if need be. This is in gm trucks 1999-2008. Please check this out for safety purposes. Very expensive to repair and gm is not standing behind the issue. Too many trucks this way to be CO-incidental.

Exhaust manifold bolts breaking off leaving studs in the heads (4) my late 2002 chevy z71 developed an exhaust leak and the catalytic converter started banging at idle or after parked. Engine has black exhaust on the head where we found the main leak. So, carbon monoxide has been coming into the cab and the engine compartment seems hotter than normal. When checking into the issue, I found every truck in our company fleet has this same issue and our associates that have personal trucks driving to work checked theirs and they also have the same issue. From 1999 thru 2008 years. When contacting our local chevy dealer, they advised they had never seen or heard of any issues like this. I find that hard to believe. Every person I mention this to, checks their truck and has the same issues with the broken bolts. There is definitely a problem with the exhaust manifold contracting and expanding too much- cheap steel attached to aluminum heads appear on all of the v-8 truck engines. Please look into this as a safety issue with heat and carbon monoxide as well as the costs to repair.

Exhaust manifold bolts breaking off leaving studs in the heads this is causing an exhaust leak, noise, carbon monoxide, added heat in the engine compartment, and will not meet emission standards. Very expensive to repair. Gm not standing behind this issue trucks 1999-2008 models all have this issue. Safety hazard. Please look at this. This is unacceptable. Also, causing problems with the catalytic converter and O2 sensor.

Exhaust manifold bolts breaking off leaving studs in the heads this is very common problem. Gm not standing behind it. Heats up the engine compartment and releases carbon monoxide into the driver. Potentially a safety hazard. It also affects the O2 sensor and the catalytic converter. Some states you cannot pass emissions because of this tragedy. Please check all vehicles from 1999-2008 for this safety issue.

The contact owns a 2004 Chevrolet Silverado 1500. The contact stated that anti-freeze leaked into the engine. The contact took the vehicle to a mechanic and was told that there was a fracture in the intake manifold, which caused the failure. The vehicle was not repaired. The failure mileage was 85,000 and the current mileage was 124,000.

I have a broken exhaust manifold bolt which is all too common on all v-8 gm engines on the silverado sierra series trucks. There are often multiple broken bolts most commonly the front or rear bolts. This should be under recall because it creates exhaust leaks and catalytic converter failure which adds a safety issue and financial burden because it is a very expensive and labor intensive repair. Complaints are all over the internet and youtube. As an ase master auto and truck tech I've repaired dozens and seen dozens more being in a government fleet operation. Gm should carry the financial burden to repair these vehicles not put the burden on the consumer. Please get the word out and lets get gm to pay up.

August 2007 purchased 2003 Chevrolet silverado 41,000 miles found out after purchase manifold bolts on drivers side and passenger side were broke. Took vehicle into Chevrolet dealer had left side manifold replaced and bought up grade bolts from gm. As of February 2, 2011 manifold bolts are breaking again causing manifold leak which is a violation of emissions and also can cause a fire hazard if this problem isn't addressed that gm has faulty manifolds someone may end up seriously injured. The truck now has 72,000 miles on it dealership was notified of the second problem and no help was given.

Exhaust manifold bolts breaking off. One next to a plastic sensor which melted. . Read more...

The contact owns a 2000 Chevrolet Silverado 1500. On September 3, 2008, the contact noticed that his vehicle was leaking antifreeze. He took the vehicle to a local repair shop and was informed that the leak originated from the intake manifold gasket, which was defective. The mechanic advised him to research to see if there was a recall for this failure before having the vehicle repaired. The vehicle has not yet been repaired and the manufacturer has not been notified. The current mileage was 110,200 and failure mileage was 110,000.

Normal use caused significant need for repair of brakes, emission system, and engine.