Toyota GR86 Engine Issues and Resolution

Introduction

• Overview of the Toyota GR86 build for a car giveaway.
• Engine issues encountered before giving the car away.
• Decision to buy a stroker kit instead of running through warranty.

The Issue

• FA24 engine history of problems in GR86s.
• Experiencing engine failure due to oil starvation, leading to bearing failure.
• The problem was identified as a bearing failure causing damage to the crankshaft.
• Overuse of sealant potentially contributed to the issue.
• Evidence of sealant and metal particles in the oil sump.

Inspection and Disassembly

• Block appears 99% okay.
• Measurement of parts to ensure reuse.
• Rod and main bearings completely failed.
• Crankshaft damage described as "banana-shaped" causing knocking noise.
• Seals and silicone overuse noted in every engine part.
• Examination of pistons and rods showing mixed good and bad conditions.

Remedial Plan

• Full clean-up of parts to remove excess sealant and contaminants.
• Use of less sealant in the rebuild.
• Installation of new parts featuring:
  • Full gasket kit from Toyota/Subaru.
  • New bearings with better tolerance.
  • ARP bolts for stronger build.
  • HKS stroker kit 2.5L for increased performance.

New Parts and Performance

• Showcase of new parts: crankshaft, rods, pistons, and gaskets.
• HKS parts improving engine robustness and power by 10-12%.
• Speculation on future upgrades and potential for boosting power.

Conclusion

• Update on the GR86 reassembly and future plans.
• Note on the current sales situation of GR86 in Europe; they are no longer available.
• Reminder to visit gap.online for more car giveaways and updates on their road and track app.
• Quick rebuild and the potential track test with the new owner.

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Stay tuned for more updates.