ls1_chevelle

iTrader: (8)

block could be cracked or headgasket failed. Only way for coolant to get into the cylinder in the amount that it would come out of the plug holes when turning over.

Duanek48

I'm really thinking that the heads are cracked. Because they are 642s. Supposedly the junkiest heads chevy made.

RedXray

Like Custom 68 said #3 piston notch is in the wrong direction. If indeed the motor has never been opened the factory F'd up. On a SBC when the piston pins are pressed on the rods, you have four notches one way and four the other, so the flats on the big end of each rod faces the adjacent rod, while the radius side of the rods face the cranks counterweights.

It could be #3 piston is in backwards because the assembler had five piston and rod assemblies for the right bank (2-4-6-8) and only three for (1-3-5-7) and said F it flipping #3 so that rod would point in the correct orientation, ensuring the rotating assembly would live. Look carefully at #3's rod orientation on the crank during disassembly.

Duanek48

Ty Red