Suspected Head Gasket Time M35 (VQ25de)

[sketchaa]

Hi Guys,

First post so if my etiquette or teminology is terrible be kind.

Just replaced radiator and having a persistent overheating issue when the car is driven, but no issue when it idles other than a steaming exhaust. Sifted around the internet a little and seems like it's going to be a waterpump, blown head gasket or cracked head (more likely the last two from the steam symptom), so the motor probably gonna have to come out of the car.

Anyone recommend any N/A tune type mods/tuning that should be done at the same time. (tension/replace timing chain probably a given as engine at +180,000)

Any advice would be great.