Hemi Valve Seats at Emmett Andrew blog

Hemi Valve Seats. I have had a few heads come thru. Overheating the engine is the most common issue here. People know the interference fit is bad, they know overheating. Early 5.7 hemi engines are known to drop valve seats, especially if the engine is overheated, doing catastrophic damage to the cylinder heads and even the long block in some. Lift for the exhaust ports. It is known that the bore for the valve seats were cut without sufficient interference fit. The numbers, in the big. The majority of the dropped valve seats have occurred with the 05, 06 and a few 07 hemi's. There seems to be no definitive answer for why the gen 3 hemi drops valve seats. Chrysler has reportedly had problems with the exhaust valve seats loosening up and dropping out in some of its late model. Beyond that, i've only heard of one 2008 that dropped one.

5.7 Hemi Valve Seat Drop
from dodgeforum.com

Early 5.7 hemi engines are known to drop valve seats, especially if the engine is overheated, doing catastrophic damage to the cylinder heads and even the long block in some. Overheating the engine is the most common issue here. The majority of the dropped valve seats have occurred with the 05, 06 and a few 07 hemi's. Lift for the exhaust ports. There seems to be no definitive answer for why the gen 3 hemi drops valve seats. Chrysler has reportedly had problems with the exhaust valve seats loosening up and dropping out in some of its late model. It is known that the bore for the valve seats were cut without sufficient interference fit. People know the interference fit is bad, they know overheating. I have had a few heads come thru. The numbers, in the big.

5.7 Hemi Valve Seat Drop

Hemi Valve Seats The numbers, in the big. I have had a few heads come thru. Overheating the engine is the most common issue here. Beyond that, i've only heard of one 2008 that dropped one. Lift for the exhaust ports. Early 5.7 hemi engines are known to drop valve seats, especially if the engine is overheated, doing catastrophic damage to the cylinder heads and even the long block in some. The majority of the dropped valve seats have occurred with the 05, 06 and a few 07 hemi's. There seems to be no definitive answer for why the gen 3 hemi drops valve seats. It is known that the bore for the valve seats were cut without sufficient interference fit. People know the interference fit is bad, they know overheating. The numbers, in the big. Chrysler has reportedly had problems with the exhaust valve seats loosening up and dropping out in some of its late model.

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