Small Block Chevy Heads
The head gasket is found between the engine block and the cylinder head or heads in a V-type engine. At the time of this writing, I have categorized some heads as super heads.” The reason is that they are a definite step up in terms of flow, and you need to know about them if you're building a large-displacement short-block of 550 inches or more. A look at the combustion chamber design on Trick Flow big block Chevy heads.
If we were aware of these issues going in, the smart move would have been to order a complete Brodix top-end package that includes the heads, intake, valve covers, and every other hardware part and gasket needed to install it under one discounted part number.
All 1995 and earlier LT-series engines use the same head bolt torque (65 ft.-lb.) and tightening sequence as the original small block. Look at the head surface and the block along with the gasket for the failure areas. There are two ways to accomplish rebuilding cylinder heads: Buy an already remanufactured cylinder head, or have it rebuilt by a local shop.
Just for the record, on the first set of 290 heads I had the ports cc'ed out at about 300. The lifters are located in the upper deck areas of the block and are held captive by the cylinder head. With a bit more effort to install, you can get a reliable head gasket seal at a cheaper price with our Head Gasket Repair.
The engine block-to-head gasket mating surface will be cleaned, and the head gasket will be inspected to identify failure points that will be scrutinized by the technician. These complications add to both the amount of time required to do the job as well as the skill of the mechanic needed to do them which also contributes to the high cost to repair a blown head gasket.
Mind you, this is an early 2,000's Winston Cup head off of a car we did the Install Heads On A Chevy engine for back then, so even though the valve appears to be shrouded (for illustration purposes) the fact is; this is actually an illusion with these particular heads because the chamber depth is really shallow right there, but you can't see the depth in the image so it looks exactly like a valve would look that needs to be unshrouded.
In the aluminum category, AFR has 265-, 290-, 300-, and 305-cc port heads. Choose a first-rate Chevrolet Avalanche cylinder head replacement at AutoZone to ensure performance that lasts for the long haul. With the current availability and popularity of aluminum heads for both Big and Small Blocks, the question of which to use (iron or aluminum?) is more pertinent now than in the recent past.
Make sure the engine does not overheat during the purging process, or head gasket or head damage could occur again. The price for an independent mechanic to replace a head gasket can be high due to the time-consuming labor involved, so, it is essential to know why you need to replace the head gasket.
The BlueDevil Head Gasket Sealer will seal during the 50 minute idle. The mating surfaces of the engine block and cylinder head assembly must be perfectly clean as well. Two wires in a very tight area cause the copper gasket to ‘stack-up' creating a very tight combustion seal but it causes coolant leaks and may warp the head.
Simply put, flow bench numbers can provide a good idea about a cylinder head's power potential, but they aren't the end all be all. The bowl area is wide around the valve guide - much wider than the old GM cast iron ‘camel-hump' heads. You have replaced your engine cylinder head gasket on your own!