Where are the cracked cylinder heads on a Chevy Silverado?
Where are the cracked cylinder heads on a Chevy Silverado?
Typically, the cracked cylinder heads are marked 706 or 862 in the front corner under the oil filler (as shown in Figure 1). However, these casting numbers alone do not positively identify Castech heads. The only way to verify that the heads are Castech is to remove the valve cover.
How much does it cost to replace a Silverado cylinder head?
For a DIY, the cost of two replacement cylinder heads varies from about $200 used to about $,1000 new or rebuilt. Figure 1. Vortec 4.8 and 5.3 liter cylinder heads and oil cap. Figure 2. Castech heads cracking and coolant leak. Figure 3. Castech cylinder head coolant leak. What causes this problem?
How does the PassLock system on a 2000 Chevy Silverado work?
by David Clair. The 2000 Chevrolet Silverado is equipped with the General Motors Passlock theft-deterrent security system. The system disables fuel to the ignition if a valid key is not used when attempting to start the engine. If the Passlock system is activated, the Silverado will not be able to be started until the system is reset.
Typically, the cracked cylinder heads are marked 706 or 862 in the front corner under the oil filler (as shown in Figure 1). However, these casting numbers alone do not positively identify Castech heads. The only way to verify that the heads are Castech is to remove the valve cover.
Can a cracked Castech Head cause engine damage?
As the coolant/oil emulsion increases, the reduced viscosity oil foams into a frothy mixture, which fails to properly lubricate bearings and fails to pump up the valve lifters; the result is cumulative engine damage. The initial signs of cracked Castech heads are: Mileage of 100,000 to 200,000, but sometimes as low as 60,000.
How much does it cost to replace a cracked cylinder head?
Replacing cracked cylinder heads varies from $200 to $2,000, as described in Step 1. Replacing the oil pump O-ring starts with about $6 for the part and may reach $400 for shop service, depending on your warranty. Otherwise, maintaining fresh, full oil is the most effective prevention of lifter and valve train problems.
What causes a Chevy Silverado engine to crack?
Some cylinder heads, made by the supplier Castech, began to crack, allowing coolant to seep into the oil. If left uncorrected, this coolant contamination of the oil can cause major engine damage. What are the components involved?
Is it possible for a cylinder head to crack?
An internal combustion engine is basically just a fancy air pump. Under extreme conditions, a cylinder head can actually crack. A cracked cylinder head may yield similar symptoms to a blown head gasket or a cracked block, but is more expensive to fix than a blown head gasket.
How to fix a cracked head on a GMC Truck?
Go to your local dealer, refer them to the bulletin, ask if your vehicle applies I had a 2004 chevy 5.3 that i traded in on Friday b/c of a coolant leak w/ no external leaks. It had castech heads and was going through a quart of antifreeze a month. This started about six months ago w/ only 45000 miles on the truck.
What happens if you have a cracked head on a Vortec?
Continuing to drive with a cracked head will likely lead to the crack becoming more severe and more coolant continuing to be lost. If you begin losing too much coolant, you can begin to experience engine overheating which can lead to warped internals. Unfortunately, the only remedy here is replacing the full cylinder head. 3.
Can a cracked cylinder head be Castech casting?
Important: If the cylinder head (s) are Not a Castech casting, follow normal diagnostic procedures in SI to determine the cause of the coolant loss. Refer to the following illustrations on how to identify Castech casting and/or the very specific areas of the cylinder head (s) for a coolant leak from porosity.
