INSPECTION AFTER REMOVAL Recirculation Valve

- Check that diaphragm lifts and the valve (B) opens when applying negative pressure with a handy vacuum pump (commercial service tool) (A).

  Standard | : Refer to Recirculation Valve (GT-R certified NISSAN dealer).

- If it exceeds the standard, replace recirculation valve.

Checking Charge Air Cooler

- Visually check that there is no incident and damage on the charge air cooler core and air tank (upper side and lower side).
- If there is an unusual condition, replace the charge air cooler.

Cleaning Charge Air Cooler
Check charge air cooler for mud or clogging. If necessary, clean charge air cooler as follows:
■ CAUTION ■

- Be careful not to bend or damage the charge air cooler fins.
- When charge air cooler is cleaned without removal, remove all surrounding parts such as cooling fan shroud and horns. Then tape the harness and connectors to prevent water from entering.

1.Apply water by hose to the back side of the charge air cooler core vertically download.

- Apply water again to all charge air cooler core surfaces once per minute.
- Stop washing if any stains no longer flow out from the charge air cooler.

2.Blow air into the back side of charge air cooler core vertically download.

- Use compressed air lower than 490 kPa (5 kg/cm2, 71 psi) and keep distance more than 30 cm (11.81 in).
- Blow air again into all the charge air cooler core surfaces once per minute until no water sprays out.