I have read that installing a steel plug seat can cause the heat from the spark plug not to transfer to the cylinder head correctly and causing the insert to blow out. Is this true?
Yes and No. Standard thread repair kits do have a problem with expansion and are known to come loose and can eventually blow back out again. Our replacement seat assembly is tapered which gives us the ability to torque the seat into the cylinder head and the small part that protrudes into the cylinder head is very thin. We also use a bonding agent to guarantee the transfer of heat into the cylinder head.
