Coolant Leaking Problems of Chevrolet Tahoe

The contact owns a 2004 Chevrolet Tahoe. The contact stated that the vehicle used excessive anti freeze. The vehicle was taken to the dealer where it was diagnosed that the vehicle had a defective castech head that leaked coolant. The technician also diagnosed that the castech heads needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 88,000. The VIN was not provided.

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I got an engine light about beginning of November code was p0430, definition is "catalyst system efficiency bank 2", this could be caused by high engine oil or coolant usage. Knowing this I check my Tahoe for coolant leaks, no visible leaks at all, I take the cover off the cylinder head and I find a lot of sludge, now I know where the antifreeze is going. My Tahoe is still running but with the engine light on and with a misfire due to the porous cylinder head, dont know how much more is going to last and can't really stop the Tahoe because it's a daily driver.

The engine has coolant leak at head. Gm is aware that the engines were made with faulty heads by a company called castec that are prone to failure in the oil return ports. They have a bulletin but are unwilling to assume any responsibility. This repair is so costly that a complete engine replacement is more feasible. The average time of this repair seems to be only 100,000 miles.

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The Tahoe has known faulty castech cylinders which cause coolant to leak with no explanation. Over the winter I have had unexplained coolant/antifreeze issue with no found leaks (coolant would be bone dry after a couple weeks of filling it). I was told the issue is probably caused by the faulty porous cylinder heads made by castech installed in gm's from 2001 - 2006. This Tahoe has a total of 80,000 miles now and experiencing issues due to known faulty parts installed by gm. Chevrolet has to be aware of the danger they are putting their customers in by not having a recall of a faulty part located in the engine. How there has not been a recall I do not understand. How Chevrolet expect the customer to pay 3-4k to replace their faulty head is ludicrous.

Drove vehicle out of town on christmas holiday trip. After being parked overnight starting vehicle next am big cloud of white gray smoke upon start. Coolant low. Refilled coolant and drove home. Now vehicle constantly leaks coolant with no apparent leak under vehicle or in engine compartment. Oil sludges between oil changes. White smoke after a 30 min drive every time. Gm has bulletin out for bad heads installed and the part number and symptoms matched cracked heads on my vehicle. Dealer aware and sees often not only in this vehicle but all 5. 3 engines from a certain time span. Dealer states will only fix at cost of consumer even though bulletin is known. This could cause an overheat situation or engine failure at a bad time or worse. Why are they not made to stand behind this when problem is known? a quick search on google will overwhelm a computer with so many accounts of this problem.

The engine cylinder heads for the 5. 3l gm motors built by castech leak coolant into the engine causing engine overheat and internal engine failures. Gm has issued a technical bulletin #060601019b to address the issue and diagnose the issue. Gm will not offer customers any financial help in the replacement of the defective parts. This issue effects the safety of the vehicle and the safety of the persons in and around the vehicle. The fouled engine oil causes the lifters to fail, the oil pressure to drop and the engine to lock up due to lack of lubrication by the fouled oil and the driver has no way of knowing this is happening as there is no external indicators.

Tl- the contact owns a 2004 Chevrolet Tahoe. The contact stated that the cylinder heads crack on the vehicle. The failure caused the vehicle to start to overheat. The contact had the vehicle inspected by a mechanic and it was found that the coolant leaked into the engine. The contact was told that if this continues the engine will eventually fail. The contact found a technical service bulletin 019b for the failure, but the manufacturer stated they would not repair the vehicle because it is not under recall. The VIN was not available. The failure mileage was 115,000 and the current mileage was 117,000. Rl.

I started having problems with my 2004 chevy Tahoe is September 2009 when the vehicle only had 71,000 miles. The vehicle was using a lot of oil and I took it to the dealership and they notified me that their was no oil leaks and performed a compression test. Since that date I have needed to add additional oil in between oil changes. In the last couple of months it started to use a lot of coolant. I have added about 4 gallons of coolant in the past two months. I took the vehicle to the dealer and was notified that the left cylinder head was leaking coolant in the engine. After further research I found that the castech heads in this model were porous which caused them to crack. The dealer is recommending that the engine be replaced at a cost of $6400. I feel chevy should be responsible for this repair since they are aware that the problem has to do with the castech heads.

Cylinder heads are leaking coolant into the engine. This causes excessive lifter noise when first started after the engine has been sitting for several hours and requires coolant to be added almost daily. This condition will eventually ruin the engine requiring the engine to be replaced. This problem is known by gm to be a defect in the casting process, yet no help is offered by gm to fix the problem.

Gm used defective engine cylinder heads for millions of 4. 8/5. 3 liter v8 engines from 2001-2006. The cylinder heads crack causing coolant to flow into the oil and cause excessive sludge to form and cause engine failure. Gm knows about the problem and issued TSB to it's service departments:1 information on gradual coolant loss over time with no evidence of leak found #06-06-01-019b - (06/12/2007). These defective cylinder heads can cause overheating and complete engine failure.

The gm 5. 3l built between 2002 and 2006 using castek corporation engine heads were incorrectly built per gm and castek. The heads leak engine coolant into the combustion chambers and burns off causing the engine to overheat. Gm has issued a technical bulletin regarding this issue and requests the heads be changed out but at the clients expense. With the loss of coolant and inevitable engine damage this is a safety hazard and should be a recall and replaced at gm cost. Technical bulletin 06-06-01-019b issued 6/12/2007.

Coolant loss without signs of leak. Loss of oil with no signs of leak. Lifters chattering on cold start. Puff of white smoke on start-up. Loss of oil pressure. Defective cylinder heads made by castech.

The engine cylinder heads for the 5. 3l gm motors built by castech leak coolant into the engine causing engine overheat and internal engine failures. Gm has issued a technical bulletin #060601019b to address the issue and diagnose the issue. Gm will not offer customers any financial help in the replacement of the defective parts. This issue effects the safety of the vehicle and the safety of the persons in and around the vehicle. The fouled engine oil causes the lifters to fail, the oil pressure to drop and the engine to lock up due to lack of lubrication by the fouled oil and the driver has no way of knowing this is happening as there is no external indicators.

Consuming oil and water - needing 1-2 quarts of oil and 1 gallon water/coolant per 900 miles. No leaks, no dripping, no spots on garage floor. At start up, there is a large cloud of blue/white smoke from exhaust. Sometimes there is a very loud tapping in the engine until well after reaching normal temperature. Oil and water is being consumed internally - due to crack in cylinder head which is a known issue with certain engine blocks.

Continuously having to fill with coolant due to leak. No leak from hoses etc. The problem comes from a defect in heads that are produced by castech. Went on line to research this and found numerous numerous complaints about this and gm/Chevrolet will not fix. Extended warrenty companies will not fix because it is a defective part. Dealerships will not talk about it but if you talk to an mechanic at a dealership and describe the problem they are quick to tell you exactly what it is and that it is a defect. The coolant seaps through the poorly manufactured castech heads. Called some of the local mechanics and they are saying the same thing-defective part. Now like I said I have checked on line and hundreds or more people are having this problem and are having to have the heads replaced and engines at out of pocket. I did not see where a lot of people are complaining on this site because like me they did not know where to go. I found out from a lawyer who also had this problem to complain on this site. He just simply got rid of his Tahoe. One said they were stuck on the side of the interstate with young kids and no phone and no way of affording to getting home from out of town. Now that is bad.

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The contact owns a 2004 Chevrolet Tahoe. The contact stated that coolant was slowly leaking into the cylinder head, causing the engine to overheat. The dealer was notified of the failure who advised that the cylinder head be replaced. There were no recalls for the failure. The manufacturer was notified who advised that the contact should take the vehicle to the dealer for repairs. They offered no further assistance. The failure mileage was 75,000 and the current mileage was 105,000.

The drives seat bolts I believe are broken/gears get stuck in park constantly/right side head gasket had to be replaced due to massive leak of coolant/sound system makes whinnin gnoise on rear speakers and cd is inoperative/defective.

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