A heads up for later yr V8 swappers.

1Gary · Post by **1Gary** » Sun Oct 31, 2010 4:03 pm

This comes from www. engine-builder.com about heads:

GM Castech Cylinder Heads
I’m sure most of you know by now about GM’s 4.8L and 5.3L Vortec Gen III and Gen IV V8 engines with Castech cylinder head castings. GM has sent a Technical Service Bulletin (TSB) for Castech specific cylinder heads that are prone to cracking. GM’s TSB #06-06-01-019B covers 4.8L and 5.3L engines with VINs V, T, M, B, Z from 2001-2006.
Be sure to check for signs of cracking if you encounter these engines/vehicles. And when pricing these jobs be sure to allow for additional costs. The conditions may result in a slow loss of coolant with no sign of leakage, or continued coolant loss after overheating the engine from a cooling system failure. Castech heads are identified by a symbol that looks like a battery on the casting.

Bill Williams
Beaver Ridge Auto
Fairplay, CO

chartman · Post by **chartman** » Thu Feb 03, 2011 8:27 pm

Why would anyone swap a 4.8 or 5.3 ? Do they even fit?

astrozam · Post by **astrozam** » Thu Feb 03, 2011 9:37 pm

Do my eyes decieve me, chartman, is that really you? lol

1Gary · Post by **1Gary** » Thu Feb 03, 2011 9:52 pm

For the later yr vans that have state emissions requirements of you must have the same yr or better engine swaps is where the interest comes from.

chevymaher · Post by **chevymaher** » Thu Feb 03, 2011 11:12 pm

Not to mention 5.3 got 300 plus HP and are LS1 motors

Chevy & GMC Vans

Chevy & GMC Vans

A heads up for later yr V8 swappers.

A heads up for later yr V8 swappers.

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Re: A heads up for later yr V8 swappers.

Re: A heads up for later yr V8 swappers.

Re: A heads up for later yr V8 swappers.