The Safer Way to Fix a Known GTR Weak Spot

The jackscrew mod on VR38 GTR heads has gained popularity as a fix for a known weak spot in the combustion chamber. But while it might look like a solution, machining from the oil side into the water jacket creates a whole new risk—coolant leaking into the oil. That’s a failure you don’t come back from. In this video, Matt and I break down why we don’t use the jackscrew method and show how we reinforce the same area without compromising the head’s integrity. Welding. Valvetrain prep. Final results. ➤ What the jackscrew mod really does ➤ Why we think it’s a risky workaround ➤ Our clean, permanent reinforcement fix ➤ A fully finished GTR head with upgraded valvetrain If you’re building a VR38 to win—not just survive—this is what you need to see. — HeadGames Motorworks | Turning Air Into Adrenaline