Reusing ARP Head Bolts Across 7M Engine Rebuilds

Engineintermediate✓ Community Verified

Problem

Uncertainty about whether ARP head bolts and hardware can be reused when rebuilding a 7M engine, since OEM fasteners sometimes need replacement and ARP kits are expensive.

Need to rebuild 7M engine and unsure if ARP head bolts must be replacedConcern about cost of purchasing new ARP hardware for each rebuild

Root Cause

Unlike OEM head bolts which are torque-to-yield and may need replacement, ARP head bolts are designed to be reusable as long as threads and hardware are undamaged. OEM head bolts stretch during torquing (torque-to-yield design), but ARP bolts/studs do not have this limitation.

Confidence

High confidence — Multiple community members agreed on this solution

View Original Thread →Posted August 2020 on SupraForums.com