These cylinder heads are aluminum made, with a cathedral-shaped intake port and a D-port exhaust port. Another sign that distinguishes a 6.0L engine is the 6.0 stamp on the engine block. Meanwhile, 6.0L engines are 3rd generation iron block engines, and they also have an intake manifold of a truck. 5.3L engines are 3rd generation aluminum block engines, and they have a truck manifold. 5.3L engines are completely different from 6.0L engines. The loss of compression is due to the larger chamber on the cylinder heads of a 6.0L engine. The 5.3L engines are not the same as 6.0 hence, if you use the same cylinder heads with a cathedral-shaped intake port on both 6.0 and 5.3L engines, you will lose compression in the case of your 5.3L engine. The cylinder heads also have a Torque to Yield (TTY) bolt style. The 826 cylinder heads on LM7 have an intake runner volume of 200cc, exhaust runner volume of 70cc, 1.890 in. They also come with a cathedral-shaped intake port and an oval exhaust port. The cylinder heads are designed with aluminum materials with a 61cc combustion chamber volume. The 862 heads are on the GM’s LM7 engines. On the other hand, the LS6 was introduced in 2001. Meanwhile, if you were contemplating the period within which the LS1 or LS6 engines were introduced, the LS1 was a predecessor to LS6 and they were introduced in 1997. The incredible LR4 heads were available in various GM vans, SUVs, and pickups from their inception until around 2007. They were introduced around 1999 besides the LQ4 and LM7 truck engines which were the first set of LS engines for GM trucks. The LR4 cylinder heads came on the 4.8 LS iron block engines of GM trucks. The LS6 did an incredible job that even the “243” casting was later recycled on LS2.Īlthough GM does not produce the LS2 and LS6 anymore, you can still get brand-new sophisticated bare castings for $850 from any Chevrolet high-performance parts dealers on the automotive parts market. LS6 was specifically designed by General Motors (GM) as the best performance. If you desire a more sophisticated cylinder head for your vehicle’s engine, 706 is an incredible choice compared to 862 heads. On the other hand, the sand cast cylinder heads (862) may not be consistent after porting the cylinder head. The semi-permanent mold (SPM) method is more consistent, even after a porting job. Meanwhile, the 862 heads are relatively sand cast. The 706 heads are superior to 862 heads because they are semi-permanent mold (SPM) made. However, the 706 heads are more sophisticated than the 862 heads. 706, the 862, and 706 heads are awesome vehicle cylinder heads. However, you must consider all factors, including your budget, before undertaking a porting job. Also, 706 heads are considered to be superior to 826 cylinder heads.Ĩ26 cylinder heads are not as sophisticated as some of their counterparts. However, the cylinder heads may not flow well compared to 243 heads. If you are asking, “Are 862 heads any good?” The 862 heads are pretty good because they can deliver better compression after a porting job. However, it can be cheaper if you go to GM for the replacement. The replacement cost is around $1,500 to $2,000 from a regular automobile parts dealer.
So, in order to fix this common cracking issue, you’ll have to get a replacement for the cracked cylinder heads. Failure to fix this issue can result in severe engine damage that can be costly to repair.
The most common problem with the 862 cylinder heads is that they crack in the long run, allowing coolant to flow into the oil. Besides the compression ratio, the 862 cylinder heads come with more sophisticated features. The cylinder head’s compression ratio leads to increased in-cylinder pressure, a higher rate of heat discharge, and quick ignition.Ī relatively high compression ratio is great for a car’s internal engine combustion process. This is an advantage when analyzing 799 Vs. They are sand-cast, with the potential to deliver more compression than their counterparts. The cylinder heads are manufactured with aluminum. Take some time to go through the subsequent sections to find out what you need to know about the 862 cylinder heads before performing a porting job.
To that effect, every car needs a sophisticated cylinder head to gain an incredible power level for performance and efficiency. The degree of airflow and fuel deployment plays a crucial role in a vehicle’s combustion process. The cylinder head controls airflow into and out of the cylinder, as well as the deployment of fuel.
862 heads are some of the best cylinder heads with the capacity to deliver more compression.