Using new head bolts when performing a cylinder head installation is always a good idea however, on late-model engines that came from the factory with TTY (torque-to yield) head bolts, replacement is an absolute necessity. TTY bolts are designed to exert the maximum clamping force for a tight head gasket seal, however they permanently stretched and could fail if re-used.
Features & Benefits:
Torque-to-yield bolts are designed so that they can be elongated beyond their elastic limit into the plastic region without problems.
When a specific tightening torque has been reached, the bolts are turned further through a defined angle, which pre-loads them into the plastic region. Consequently, no retorquing is necessary.
Although it is a very effective means to get the maximum, uniform clamping load from each bolt, it permanently distorts the bolts, preventing them from being reusable under any circumstance.
Anmerkung für Kunden in Kalifornien - Warnung: Krebs www.P65Warnings.ca.gov
Erstausrüstung / alternative Artikelnummern: HB33001
VICTOR REINZ Garantie Information:12 Monate/12.000 Meilen
